{"title":"Fosi Audio","description":"\u003cp style=\"text-align: center;\"\u003e\u003ca href=\"https:\/\/listenup.com\/pages\/fosi-audio\"\u003eFosi Audio\u003c\/a\u003e delivers high-quality audio products that combine impressive sound performance, modern design, and exceptional value. \u003cbr\u003eFrom amplifiers and DACs to headphones and preamps, \u003cbr\u003eFosi Audio makes premium Hi-Fi listening more accessible to music lovers and audiophiles alike.\u003c\/p\u003e","products":[{"product_id":"fosi-audio-i5-open-back-planar-magnetic-headphones","title":"Fosi Audio i5 Open-Back Planar Magnetic Headphones","description":"\u003ch3\u003eFosi Audio i5 Open-Back Planar Magnetic Headphones\u003c\/h3\u003e \u003cp\u003eExperience exceptional detail, natural sound, and premium craftsmanship with the Fosi Audio i5 Open-Back Planar Magnetic Headphones. Designed for audiophiles and critical listeners, the i5 combines an ultra-large 97mm planar magnetic driver, an advanced 2μm nano-thin diaphragm, and a precision-engineered magnetic system to deliver outstanding clarity, fast transient response, and low distortion. Its open-back design creates a spacious, immersive soundstage that brings out the subtle textures, instrument separation, and dynamics of your favorite recordings.\u003c\/p\u003e \u003cp\u003eAt the heart of the Fosi Audio i5 is an advanced planar magnetic transducer featuring a magnetron-sputtered silver alloy conductive layer and 44 high-strength N50 neodymium magnets. This sophisticated driver architecture provides precise diaphragm control across an extended 10Hz–50kHz frequency response, reproducing everything from deep bass notes to delicate high-frequency details. The acoustically transparent rear grille minimizes unwanted resonance and acoustic resistance, allowing music to sound open, natural, and remarkably lifelike.\u003c\/p\u003e \u003cp\u003ePremium materials and thoughtful ergonomics make the i5 equally impressive in design and comfort. Handcrafted walnut wood chambers complement a CNC-machined aluminum frame, while a flexible memory-steel headband, genuine sheepskin headband covering, and multi-axis adjustable earcups provide a secure, adaptable fit. Breathable, cushioned ear pads and precision silicone adjustment sliders help distribute pressure comfortably during extended listening sessions. With a 28-ohm impedance and 98dB\/mW sensitivity, the i5 is compatible with a variety of headphone amplification setups, although Fosi Audio recommends at least 500mW of output power for optimal performance.\u003c\/p\u003e \u003ch4\u003eSpecifications\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Fosi Audio\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e i5\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Over-ear planar magnetic headphones\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAcoustic Design:\u003c\/strong\u003e Open-back\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDriver Type:\u003c\/strong\u003e Planar magnetic transducer\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDriver Size:\u003c\/strong\u003e 97mm\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDiaphragm Thickness:\u003c\/strong\u003e 2μm ultra-thin diaphragm\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDiaphragm Technology:\u003c\/strong\u003e Nano-thin diaphragm with magnetron-sputtered silver alloy conductive coating\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eConductive Layer:\u003c\/strong\u003e Approximately 1.3μm silver metal voice coil coating\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMagnetic System:\u003c\/strong\u003e 44 N50-grade neodymium magnets total, with 22 magnets per driver\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e 10Hz–50kHz\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNominal Impedance:\u003c\/strong\u003e 28 ohms\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSensitivity:\u003c\/strong\u003e 98dB\/mW at 1kHz\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMaximum Sound Pressure Level:\u003c\/strong\u003e ≥120dB SPL\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTotal Harmonic Distortion:\u003c\/strong\u003e Less than 1% at 100dB SPL\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRecommended Amplifier Power:\u003c\/strong\u003e ≥500mW\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHeadphone Construction:\u003c\/strong\u003e Handcrafted walnut wood chambers and CNC-machined aluminum frame\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRear Grille:\u003c\/strong\u003e Acoustically transparent rigid open-back mesh\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHeadband:\u003c\/strong\u003e Flexible memory-steel construction with genuine sheepskin covering\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHeadband Adjustment:\u003c\/strong\u003e Precision silicone adjustment sliders\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eEarcup Design:\u003c\/strong\u003e Multi-axis pivoting earcups\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eEar Pads:\u003c\/strong\u003e Breathable cushioned pads with memory foam\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApproximate Weight:\u003c\/strong\u003e 550g\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eConnectivity:\u003c\/strong\u003e Wired\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIncluded Cable:\u003c\/strong\u003e 3.5mm headphone cable\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIncluded Adapter:\u003c\/strong\u003e 6.35mm headphone adapter\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAdditional Included Accessories:\u003c\/strong\u003e User manual\u003c\/li\u003e \u003c\/ul\u003e \u003ch4\u003eWhat It's Great At\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eUltra-Large 97mm Planar Magnetic Drivers:\u003c\/strong\u003e Advanced planar magnetic transducers with ultra-thin diaphragms deliver exceptional resolution, accurate instrument separation, and fast transient response for detailed, engaging music reproduction.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eExpansive Open-Back Soundstage:\u003c\/strong\u003e An acoustically transparent rear grille reduces unwanted resonance and allows sound to develop naturally, creating an open and immersive presentation with excellent spatial imaging.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePrecision Magnetic System:\u003c\/strong\u003e A symmetrical arrangement of 44 N50 neodymium magnets provides precise diaphragm control, reducing nonlinear distortion and preserving delicate musical details.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAdvanced Silver Alloy Diaphragm Coating:\u003c\/strong\u003e Magnetron-sputtered conductive material helps improve signal responsiveness, sound clarity, and long-term driver consistency.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePremium Walnut and Aluminum Construction:\u003c\/strong\u003e Handcrafted walnut chambers, CNC-machined aluminum components, and refined finishing details combine durability with a sophisticated audiophile aesthetic.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDesigned for Extended Listening:\u003c\/strong\u003e A flexible memory-steel headband, multi-axis pivoting earcups, adjustable silicone sliders, and breathable cushioned ear pads create an adaptable fit for longer listening sessions.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eExtended Frequency Reproduction:\u003c\/strong\u003e A wide 10Hz–50kHz frequency response supports deep low-frequency extension, articulate midrange reproduction, and detailed high-frequency performance.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eExcellent for Dedicated Hi-Fi Systems:\u003c\/strong\u003e The i5 is well suited to desktop DAC and headphone amplifier setups, with Fosi Audio recommending at least 500mW of amplifier power for optimal results.\u003c\/li\u003e \u003c\/ul\u003e \u003ch4\u003eFAQ Section\u003c\/h4\u003e \u003cp\u003e\u003cstrong\u003eQ: What type of headphones are the Fosi Audio i5?\u003c\/strong\u003e\u003cbr\u003eA: The Fosi Audio i5 are wired, open-back, over-ear planar magnetic headphones designed for high-fidelity music listening. They feature large 97mm planar drivers that deliver detailed sound, fast transient response, and a spacious listening experience.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eQ: What are the benefits of planar magnetic drivers?\u003c\/strong\u003e\u003cbr\u003eA: Planar magnetic drivers use a thin diaphragm controlled by a magnetic field to reproduce sound with precise movement and low distortion. The i5 uses a 2μm ultra-thin diaphragm and 44 N50 neodymium magnets to reproduce subtle musical details, accurate instrument separation, and controlled dynamics.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eQ: Do the Fosi Audio i5 headphones need an amplifier?\u003c\/strong\u003e\u003cbr\u003eA: A dedicated headphone amplifier is recommended for optimal performance. Although the i5 has a nominal impedance of 28 ohms and a sensitivity of 98dB\/mW, Fosi Audio recommends an amplifier capable of delivering at least 500mW of output power.\u003c\/p\u003e","brand":"Fosi Audio","offers":[{"title":"Default Title","offer_id":62887243612319,"sku":"FOS-I5-BRO","price":549.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0495\/6910\/4031\/files\/b3ce8967-796e-49e0-8b91-3847deb115f9.jpg?v=1791557354"},{"product_id":"fosi-audio-k7-desktop-dac-amp-headphone-amplifier","title":"Fosi Audio K7 Desktop DAC \u0026amp; Headphone Amplifier","description":"\u003ch3\u003eFosi Audio K7 Desktop DAC \u0026amp; Headphone Amplifier\u003c\/h3\u003e  \u003cp\u003eUpgrade your desktop audio experience with the Fosi Audio K7 Desktop DAC \u0026amp; Headphone Amplifier, a versatile all-in-one solution designed for high-fidelity music listening, gaming, and everyday entertainment. Combining a premium AKM AK4493SEQ DAC, XMOS XU208 USB processor, and powerful headphone amplification, the K7 delivers detailed, low-distortion sound with support for high-resolution PCM audio up to 32-bit\/384kHz and native DSD256. With up to 2,100mW per channel through its 4.4mm balanced headphone output, the K7 provides the power and precision needed to drive a wide range of headphones while maintaining excellent clarity and dynamic performance.\u003c\/p\u003e  \u003cp\u003eDesigned to serve as the centerpiece of a modern desktop audio system, the K7 offers USB-C, optical, coaxial, and Bluetooth 5.0 connectivity with support for aptX HD and aptX Low Latency. A dedicated 3.5mm microphone input with noise reduction makes it equally useful for online gaming, voice chat, and communication. Choose between 3.5mm single-ended and 4.4mm balanced headphone outputs, or connect powered speakers and external amplifiers using the RCA line outputs. Compatible with PCs, Macs, PlayStation consoles, Nintendo Switch, and other supported digital audio devices, the K7 brings flexibility to nearly any listening environment.\u003c\/p\u003e  \u003cp\u003eBuilt around a fully balanced circuit design, the Fosi Audio K7 achieves exceptionally low distortion while incorporating high\/low gain settings, adjustable bass and treble controls, and an EQ bypass mode for a more direct listening experience. Its precision-machined aluminum alloy chassis features an angled ergonomic design, two large multifunction control knobs, dedicated shortcut buttons, and a 1.5-inch display that provides clear information about playback formats, inputs, and settings. Whether you're enjoying high-resolution music, competing in your favorite game, or building a compact desktop Hi-Fi system, the K7 combines powerful performance with convenient everyday operation.\u003c\/p\u003e  \u003ch4\u003eSpecifications\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Fosi Audio\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e K7\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Desktop DAC, headphone amplifier, and gaming audio interface\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDAC Chip:\u003c\/strong\u003e AKM AK4493SEQ\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUSB Audio Processor:\u003c\/strong\u003e XMOS XU208\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Chip:\u003c\/strong\u003e Qualcomm QCC3031\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHeadphone Amplifier Chip:\u003c\/strong\u003e TPA6120\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCircuit Design:\u003c\/strong\u003e Fully balanced audio circuitry with low-noise LDO voltage regulators\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUSB Audio Resolution:\u003c\/strong\u003e Up to 32-bit\/384kHz PCM and DSD256\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOptical Audio Resolution:\u003c\/strong\u003e Up to 24-bit\/192kHz PCM\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCoaxial Audio Resolution:\u003c\/strong\u003e Up to 24-bit\/192kHz PCM\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Audio Resolution:\u003c\/strong\u003e Up to 24-bit\/48kHz PCM\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDigital Audio Inputs:\u003c\/strong\u003e USB-C, optical, coaxial, Bluetooth\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMicrophone Input:\u003c\/strong\u003e 3.5mm microphone connection with noise reduction\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHeadphone Outputs:\u003c\/strong\u003e 3.5mm single-ended and 4.4mm balanced\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eLine Output:\u003c\/strong\u003e Stereo RCA\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSupported Headphone Impedance:\u003c\/strong\u003e 16–300 ohms\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBalanced Headphone Output Power:\u003c\/strong\u003e At least 2,100mW per channel at 32 ohms, THD+N below 1%\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBalanced Output Signal-to-Noise Ratio:\u003c\/strong\u003e 121dB (A-weighted)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBalanced Output THD+N:\u003c\/strong\u003e Less than 0.0002% (A-weighted)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBalanced Output Dynamic Range:\u003c\/strong\u003e 121dB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBalanced Output Noise Floor:\u003c\/strong\u003e 6.5µV or less (A-weighted)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBalanced Output Frequency Response:\u003c\/strong\u003e 20Hz–20kHz (±0.2dB)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSingle-Ended Headphone Output Power:\u003c\/strong\u003e At least 600mW per channel at 32 ohms, THD+N below 1%\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSingle-Ended Output Signal-to-Noise Ratio:\u003c\/strong\u003e 122dB (A-weighted)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSingle-Ended Output THD+N:\u003c\/strong\u003e 0.0005% (A-weighted)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSingle-Ended Output Dynamic Range:\u003c\/strong\u003e 121dB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSingle-Ended Output Noise Floor:\u003c\/strong\u003e 2.5µV or less (A-weighted)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSingle-Ended Output Frequency Response:\u003c\/strong\u003e 20Hz–20kHz (±0.2dB)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRCA Output Level:\u003c\/strong\u003e At least 2Vrms\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRCA Signal-to-Noise Ratio:\u003c\/strong\u003e 121dB (A-weighted)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRCA THD+N:\u003c\/strong\u003e 0.0005% (A-weighted)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRCA Dynamic Range:\u003c\/strong\u003e 121dB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRCA Noise Floor:\u003c\/strong\u003e 3µV or less (A-weighted)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRCA Frequency Response:\u003c\/strong\u003e 20Hz–20kHz (±0.2dB)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Version:\u003c\/strong\u003e 5.0\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Audio Codecs:\u003c\/strong\u003e SBC, AAC, aptX, aptX HD, aptX Low Latency\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Wireless Range:\u003c\/strong\u003e Up to 13 meters under suitable conditions\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eGain Settings:\u003c\/strong\u003e High and low headphone gain\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTone Controls:\u003c\/strong\u003e Adjustable bass and treble\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eEQ Bypass:\u003c\/strong\u003e Direct-signal mode bypasses internal bass and treble adjustments\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMicrophone Functions:\u003c\/strong\u003e Adjustable microphone volume and mute support in USB Audio Class 1.0 mode\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUSB Audio Modes:\u003c\/strong\u003e UAC 1.0 and UAC 2.0\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUAC 1.0 Audio:\u003c\/strong\u003e 16-bit\/48kHz with microphone communication support\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDisplay:\u003c\/strong\u003e 1.5-inch high-resolution status display\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eControls:\u003c\/strong\u003e Dual multifunction knobs, input\/output selection, power\/UAC selection, tone\/microphone adjustment, and EQ bypass controls\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDisplay Information:\u003c\/strong\u003e Input source, output mode, PCM\/DSD format, sampling rate, Bluetooth codec, EQ settings, and microphone status\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eChassis:\u003c\/strong\u003e CNC-machined aluminum alloy with an angled desktop design\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eComputer Compatibility:\u003c\/strong\u003e Windows, macOS, and Linux\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eGaming Compatibility:\u003c\/strong\u003e Compatible with supported PlayStation and Nintendo Switch USB audio connections\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUSB Driver Requirements:\u003c\/strong\u003e Standard PCM playback is plug-and-play on supported modern Windows and macOS systems; drivers may be required for older Windows versions or DSD playback\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFirmware Updates:\u003c\/strong\u003e XMOS firmware updates supported through USB-C\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePower Requirement:\u003c\/strong\u003e DC 12V\/2A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIncluded Accessories:\u003c\/strong\u003e USB-A\/C to USB-C cable, Bluetooth antenna, Y-splitter cable, 12V power adapter, and user manual\u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003eWhat It's Great At\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eHigh-Resolution Music Playback:\u003c\/strong\u003e The AKM AK4493SEQ DAC and XMOS XU208 processor support PCM up to 32-bit\/384kHz and DSD256, delivering detailed digital-to-analog conversion for high-quality music listening.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePowerful Balanced Headphone Amplification:\u003c\/strong\u003e Delivering at least 2,100mW per channel at 32 ohms through its 4.4mm balanced output, the K7 provides substantial amplification for demanding wired headphones.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile Desktop Connectivity:\u003c\/strong\u003e USB-C, optical, coaxial, Bluetooth, dual headphone outputs, and RCA connections make the K7 an adaptable centerpiece for music, gaming, and desktop audio systems.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eGaming and Voice Communication:\u003c\/strong\u003e The dedicated 3.5mm microphone input, noise reduction, microphone volume adjustment, and UAC 1.0 compatibility support clear communication during compatible gaming and voice-chat applications.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCustomizable Sound and Convenient Controls:\u003c\/strong\u003e Adjustable bass, treble, headphone gain, and EQ bypass settings allow listeners to tailor playback without relying on complicated software menus.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePremium Desktop Design:\u003c\/strong\u003e A durable aluminum chassis, angled control surface, multifunction knobs, and 1.5-inch display combine modern aesthetics with practical everyday operation.\u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003eFAQ Section\u003c\/h4\u003e  \u003cp\u003e\u003cstrong\u003eQ: What is the Fosi Audio K7 used for?\u003c\/strong\u003e\u003cbr\u003e A: The Fosi Audio K7 is a desktop digital-to-analog converter and headphone amplifier designed for high-resolution music playback, gaming, and general computer audio. It can power wired headphones, receive audio from multiple digital sources, and connect to powered speakers or external amplifiers through RCA outputs.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can the Fosi Audio K7 drive high-impedance headphones?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The K7 supports headphones with impedances ranging from 16 to 300 ohms and provides up to at least 2,100mW per channel at 32 ohms through its balanced output. Its high and low gain settings help accommodate headphones with different amplification requirements.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio K7 support balanced headphones?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The K7 features a dedicated 4.4mm balanced headphone output and a standard 3.5mm single-ended output. The balanced connection offers substantially higher rated output power when used with compatible headphones and a properly wired balanced cable.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio K7 support Bluetooth audio?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The K7 features Bluetooth 5.0 with support for SBC, AAC, aptX, aptX HD, and aptX Low Latency codecs. It can receive wireless audio from compatible smartphones, tablets, and computers for playback through connected wired headphones or an external audio system.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can I connect the Fosi Audio K7 to a PlayStation or Nintendo Switch?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The K7 supports compatible PlayStation and Nintendo Switch USB audio connections using USB Audio Class 1.0 mode. This mode also supports microphone communication at 16-bit\/48kHz with the appropriate headset or microphone connections.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can I connect powered speakers to the Fosi Audio K7?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The K7 includes stereo RCA line outputs for connecting powered speakers, integrated amplifiers, or other compatible audio equipment. Use the output selector to switch between headphone playback and RCA line output.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can I adjust the bass and treble on the Fosi Audio K7?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The K7 features adjustable bass and treble controls for customizing your listening experience. An EQ bypass function allows you to disable the tone adjustments when you prefer a more direct audio signal.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio K7 require drivers to work with a computer?\u003c\/strong\u003e\u003cbr\u003e A: Standard PCM playback is plug-and-play with supported modern Windows and macOS computers. Certain older Windows operating systems or DSD playback configurations may require additional drivers. 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Featuring Fosi Audio's proprietary StepSense AI technology, the C3 analyzes in-game audio in real time to identify and enhance critical sounds such as enemy footsteps by 3–9dB with just 10ms of processing latency. Unlike traditional EQ adjustments that boost entire frequency ranges, StepSense intelligently emphasizes footsteps without unnecessarily amplifying gunfire, explosions, or other background effects, helping players identify enemy locations and react with greater confidence.\u003c\/p\u003e  \u003cp\u003eBuilt with audiophile-grade components, the C3 combines an XMOS XU316 USB audio processor, Cirrus Logic CS43131 DAC, and dual Texas Instruments TPA6120 headphone amplifier chips to deliver detailed, low-distortion sound with accurate imaging and excellent clarity. Supporting high-resolution PCM audio up to 32-bit\/384kHz and native DSD256 through USB Audio Class 2.0, the C3 is equally capable of handling demanding music collections and immersive gaming soundtracks. Its 3.5mm headphone output delivers at least 320mW per channel into 32 ohms, while hardware-level 7.1 virtual surround processing creates a more expansive, directional listening experience with compatible multichannel games and movies.\u003c\/p\u003e  \u003cp\u003eDesigned for seamless integration into modern gaming setups, the StepSense C3 features USB-C, optical, and coaxial digital inputs, a dedicated 3.5mm microphone input, and stereo RCA outputs for connecting powered speakers or external amplifiers. AI-powered microphone noise reduction suppresses distracting keyboard clicks, fan noise, and other environmental sounds by up to 40dB for clearer communication during gaming, streaming, and voice calls. Independent headphone and microphone volume controls, one-touch microphone muting, and sidetone monitoring provide convenient control over your gaming audio.\u003c\/p\u003e  \u003cp\u003eThe Fosi Audio C3 also offers customizable parametric EQ, game-specific sound presets, and a browser-based control interface that lets you adjust audio settings without installing traditional desktop software. Its compact aluminum alloy chassis features an ergonomic 5-degree angled design with tactile buttons and sliders for quick adjustments during gameplay. 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DSD playback may require additional drivers or software configuration\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFirmware Updates:\u003c\/strong\u003e USB-C firmware updates through the Fosi Audio web application\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePower Input:\u003c\/strong\u003e DC 5V via USB-C\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePower Source:\u003c\/strong\u003e USB bus-powered\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eChassis Material:\u003c\/strong\u003e Aluminum alloy\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDesign:\u003c\/strong\u003e Compact desktop enclosure with 5-degree angled control surface\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 24-month limited manufacturer warranty\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eEAN:\u003c\/strong\u003e 6976136961284\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIncluded Accessories:\u003c\/strong\u003e USB-A\/C to USB-C cable, 3.5mm Y-splitter cable, and user manual\u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003eWhat It's Great At\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAI-Powered Footstep Detection:\u003c\/strong\u003e Proprietary StepSense technology identifies and enhances enemy footsteps by 3–9dB with approximately 10ms processing latency, helping competitive FPS players recognize important positional audio cues.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eImmersive 7.1 Virtual Surround Sound:\u003c\/strong\u003e Hardware-based spatial processing converts compatible multichannel game and movie audio into an expansive two-channel listening experience with improved directional awareness.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHigh-Resolution Gaming and Music Audio:\u003c\/strong\u003e The combination of XMOS XU316 processing, a Cirrus Logic CS43131 DAC, and dual TPA6120 amplifier chips delivers detailed audio with support for PCM up to 32-bit\/384kHz and DSD256.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eClearer Gaming Communication:\u003c\/strong\u003e AI-powered microphone noise reduction suppresses unwanted background sounds by up to 40dB, while independent microphone volume, mute, and monitoring controls keep communication convenient.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCustomizable Sound Profiles:\u003c\/strong\u003e Browser-based parametric EQ and selectable sound modes let players adjust their listening experience for competitive gaming, movies, or high-fidelity music playback.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFlexible Desktop and Console Connectivity:\u003c\/strong\u003e USB-C, optical, coaxial, dedicated microphone input, headphone output, and RCA connections provide versatile compatibility with computers, supported gaming consoles, wired headphones, and powered speakers.\u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003eFAQ Section\u003c\/h4\u003e  \u003cp\u003e\u003cstrong\u003eQ: What is the Fosi Audio StepSense C3 used for?\u003c\/strong\u003e\u003cbr\u003e A: The Fosi Audio StepSense C3 is a gaming DAC, headphone amplifier, and external sound card designed to improve audio clarity, directional awareness, and communication during gameplay. It also functions as a high-resolution desktop DAC for music listening and connects to compatible headphones, gaming headsets, and powered speakers.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: How does StepSense AI footstep enhancement work?\u003c\/strong\u003e\u003cbr\u003e A: StepSense uses a dedicated on-device AI algorithm to recognize and enhance footsteps in supported FPS games. It boosts detected footsteps by 3–9dB with approximately 10ms processing latency, helping players hear subtle movement without broadly increasing the volume of explosions, gunfire, or ambient effects. StepSense requires UAC 1.0 mode.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio C3 support 7.1 surround sound?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The C3 supports hardware-level 7.1 virtual surround processing that converts compatible 5.1 and 7.1 multichannel audio into a spatial two-channel headphone experience. This feature operates in UAC 1.0 mode with supported multichannel content and is not applied to ordinary stereo sources.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can I use the Fosi Audio C3 with a PlayStation 5 or Nintendo Switch?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The C3 supports compatible PlayStation 5 and Nintendo Switch USB audio connections using UAC 1.0 mode. This mode provides 16-bit\/48kHz audio and supports microphone communication with a properly connected compatible headset.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio C3 improve microphone quality?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The C3 features AI-powered microphone noise reduction designed to suppress background sounds such as keyboard clicks and computer fan noise by up to 40dB. It also includes independent microphone volume, mute, and sidetone monitoring functions in UAC 1.0 mode.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can I use the Fosi Audio C3 for high-resolution music listening?\u003c\/strong\u003e\u003cbr\u003e A: Absolutely. In UAC 2.0 mode, the C3 supports PCM audio up to 32-bit\/384kHz and DSD256. For music listening, users can select Bypass mode to disable audio processing or adjust the parametric EQ to customize the sound.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can I connect powered speakers to the Fosi Audio C3?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The C3 includes stereo RCA line outputs for connecting powered speakers, integrated amplifiers, and other compatible audio equipment. The headphone and RCA outputs operate simultaneously rather than offering independent output selection.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Do I need to install software to customize the Fosi Audio C3?\u003c\/strong\u003e\u003cbr\u003e A: No traditional desktop application installation is required for the main sound customization features. Connect the C3 to a compatible Windows or macOS computer and visit https:\/\/cc.fosiaudio.com to access the browser-based interface, select sound profiles, adjust parametric EQ settings, and manage supported firmware updates. 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Featuring a flagship ESS Sabre ES9039Q2M DAC and four ESS ES9603Q amplifier chips, the MD3 delivers detailed, low-distortion audio with support for PCM up to 32-bit\/384kHz and native DSD256. With a compact magnetic design, customizable rear display, and both 3.5mm single-ended and 4.4mm balanced headphone outputs, the MD3 transforms compatible smartphones, tablets, and computers into high-performance portable listening systems.\u003c\/p\u003e  \u003cp\u003eDesigned for music lovers who want exceptional sound without carrying bulky equipment, the MD3 features a strong N52 magnetic attachment system that securely connects to compatible MagSafe-style smartphones and cases. Its lightweight, pocket-sized construction weighs approximately 50 grams and features rounded corners with a premium leather-finished surface for a comfortable, refined appearance. Whether you're commuting, traveling, working, or relaxing at home, the MD3 keeps your DAC conveniently attached to your phone while delivering the clarity and dynamics expected from a dedicated headphone amplifier.\u003c\/p\u003e  \u003cp\u003eAt the heart of the MD3 is its fully balanced amplification system, delivering at least 180mW per channel into 32 ohms through the 4.4mm balanced headphone output and at least 80mW per channel through the standard 3.5mm connection. Supporting headphones with impedances ranging from 16 to 300 ohms, the MD3 offers flexible pairing with modern in-ear monitors, audiophile headphones, and other compatible wired listening devices. Its ESS Sabre DAC and ultra-low noise floor help preserve subtle musical details, accurate instrument separation, and dynamic contrast across a wide range of music genres.\u003c\/p\u003e  \u003cp\u003eOne of the MD3's most convenient features is its dual USB-C design, which supports simultaneous music playback and pass-through charging. Connect an external power source to the upper USB-C port while using the lower USB-C connection with your phone, allowing you to keep listening while your device charges. The MD3 also features a customizable rear display that can showcase personal photos, favorite images, emojis, and animations. Built-in mini games, including Rolling Dice, Wine Bottle, and Rock Paper Scissors, add a playful element to this unique portable audio device. Combining premium audio components, magnetic convenience, and personalized visual features, the Fosi Audio MD3 MagDAC is an excellent companion for anyone looking to upgrade their mobile listening experience.\u003c\/p\u003e  \u003ch4\u003eSpecifications\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Fosi Audio\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e MD3 MagDAC\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Portable magnetic USB DAC and headphone amplifier\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDAC Chip:\u003c\/strong\u003e ESS Sabre ES9039Q2M\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmplifier Chips:\u003c\/strong\u003e ESS ES9603Q ×4\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmplification Design:\u003c\/strong\u003e Balanced headphone amplification\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUSB Connectivity:\u003c\/strong\u003e Dual USB-C ports\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUpper USB-C Port:\u003c\/strong\u003e Audio decoding, image transfer, and charging input\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eLower USB-C Port:\u003c\/strong\u003e Audio decoding, image transfer, and firmware upgrades\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePass-Through Charging:\u003c\/strong\u003e Supports simultaneous listening and charging through the dual USB-C configuration\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUSB Audio Classes:\u003c\/strong\u003e UAC 1.0 and UAC 2.0\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUAC 2.0 Maximum PCM Resolution:\u003c\/strong\u003e 32-bit\/384kHz\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUAC 2.0 DSD Support:\u003c\/strong\u003e Native DSD256\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUAC 1.0 Maximum Resolution:\u003c\/strong\u003e 16-bit\/48kHz PCM\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHeadphone Outputs:\u003c\/strong\u003e 3.5mm single-ended and 4.4mm balanced\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3.5mm Output Power:\u003c\/strong\u003e At least 80mW ×2 at 32 ohms (1kHz, THD+N below 1%)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e4.4mm Balanced Output Power:\u003c\/strong\u003e At least 180mW ×2 at 32 ohms (1kHz, THD+N below 1%)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSupported Headphone Impedance:\u003c\/strong\u003e 16–300 ohms\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e 20Hz–48kHz (±0.2dB)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3.5mm Signal-to-Noise Ratio:\u003c\/strong\u003e At least 115dB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e4.4mm Signal-to-Noise Ratio:\u003c\/strong\u003e At least 116dB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3.5mm Dynamic Range:\u003c\/strong\u003e At least 115dB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e4.4mm Dynamic Range:\u003c\/strong\u003e At least 116dB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3.5mm Total Harmonic Distortion + Noise:\u003c\/strong\u003e 0.00075% or less\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e4.4mm Total Harmonic Distortion + Noise:\u003c\/strong\u003e 0.00084% or less\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3.5mm Noise Floor:\u003c\/strong\u003e Less than 1.7µV\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e4.4mm Noise Floor:\u003c\/strong\u003e Less than 2.7µV\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMagnetic Attachment:\u003c\/strong\u003e MagSafe-style magnetic mounting system\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMagnet Type:\u003c\/strong\u003e Strong N52 magnets\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCompatible Mounting:\u003c\/strong\u003e MagSafe-compatible smartphones and magnetic cases\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDisplay:\u003c\/strong\u003e 1.28-inch customizable rear LCD display\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDisplay Customization:\u003c\/strong\u003e Personal images, photos, emojis, and animations\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBuilt-In Display Features:\u003c\/strong\u003e Photo album and interactive mini games\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMini Games:\u003c\/strong\u003e Rolling Dice, Wine Bottle, and Rock Paper Scissors\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDesign:\u003c\/strong\u003e Compact portable enclosure with rounded corners\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eExterior Finish:\u003c\/strong\u003e Premium leather-finished surface\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAvailable Colors:\u003c\/strong\u003e Galaxy and Obsidian\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 70 × 45 × 12mm (2.76 × 1.77 × 0.47 inches)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 50g ±2g (approximately 0.11 lb), excluding cable\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAudio Source Compatibility:\u003c\/strong\u003e Compatible USB-C smartphones, tablets, and computers supporting USB audio output\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFirmware Updates:\u003c\/strong\u003e Supported through the lower USB-C port\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer Warranty:\u003c\/strong\u003e 24 months\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIncluded Accessories:\u003c\/strong\u003e Fosi Audio MD3 MagDAC, USB-C to USB-C adapter, user manual, and quick guide\u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003eWhat It's Great At\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eHigh-Resolution Portable Audio:\u003c\/strong\u003e The ESS Sabre ES9039Q2M DAC supports PCM up to 32-bit\/384kHz and native DSD256, delivering precise digital-to-analog conversion for detailed music playback from compatible USB-C devices.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eConvenient Magnetic Smartphone Attachment:\u003c\/strong\u003e Strong N52 magnets allow the MD3 to attach to MagSafe-compatible phones and cases, creating a compact listening setup without a freely dangling DAC.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eBalanced Headphone Amplification:\u003c\/strong\u003e Four ESS ES9603Q amplifier chips provide at least 180mW per channel at 32 ohms through the 4.4mm balanced output, offering substantial power for compatible IEMs and wired headphones.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eListen While Charging:\u003c\/strong\u003e Dual USB-C connectivity allows compatible smartphones to charge while the MD3 continues processing audio, making it particularly useful during long listening sessions, travel, and everyday use.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eCustomizable Rear Display:\u003c\/strong\u003e The personalized display supports photos, images, emojis, animations, and interactive mini games, adding a unique visual experience to a high-performance portable DAC.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eLightweight Everyday Portability:\u003c\/strong\u003e Weighing approximately 50 grams and measuring just 12mm thick, the MD3 fits easily into pockets and travel bags while providing a refined alternative to conventional USB dongle DACs.\u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003eFAQ Section\u003c\/h4\u003e  \u003cp\u003e\u003cstrong\u003eQ: What is the Fosi Audio MD3 MagDAC?\u003c\/strong\u003e\u003cbr\u003e A: The Fosi Audio MD3 MagDAC is a portable USB-C digital-to-analog converter and headphone amplifier designed to improve wired headphone sound quality when connected to compatible smartphones, tablets, and computers. It combines high-resolution audio processing, magnetic smartphone attachment, balanced headphone amplification, and a customizable rear display.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio MD3 support high-resolution audio?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The MD3 uses an ESS Sabre ES9039Q2M DAC and supports PCM audio up to 32-bit\/384kHz and native DSD256 in USB Audio Class 2.0 mode. It also supports USB Audio Class 1.0 playback up to 16-bit\/48kHz for compatibility with supported devices.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio MD3 work with iPhones and Android smartphones?\u003c\/strong\u003e\u003cbr\u003e A: The MD3 is designed for compatible USB-C smartphones, including supported USB-C iPhones and Android devices. Its magnetic attachment works with MagSafe-compatible phones and magnetic cases, while audio playback requires a compatible USB connection. Magnetic attachment and USB audio compatibility should be verified for individual devices and cases.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can I charge my phone while using the Fosi Audio MD3?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The MD3 features dual USB-C connectivity with pass-through charging support. Connecting external power to the upper USB-C port while the lower port is connected to a compatible smartphone allows the phone to charge while music continues playing.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio MD3 have a balanced headphone output?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The MD3 features a 4.4mm balanced headphone output delivering at least 180mW per channel at 32 ohms. It also includes a standard 3.5mm single-ended connection delivering at least 80mW per channel at 32 ohms, making it compatible with a wide selection of wired headphones and in-ear monitors.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can I customize the display on the Fosi Audio MD3?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The MD3 features a customizable rear display that supports personal photos, images, emojis, and animations. It also includes a photo album and interactive mini games such as Rolling Dice, Wine Bottle, and Rock Paper Scissors, bringing a personalized element to your portable listening setup.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Is the Fosi Audio MD3 powerful enough for audiophile headphones?\u003c\/strong\u003e\u003cbr\u003e A: The MD3 supports headphones with rated impedances between 16 and 300 ohms and offers both 3.5mm single-ended and 4.4mm balanced amplification. Its balanced output provides at least 180mW per channel at 32 ohms, making it well suited to many modern IEMs and portable headphones, although particularly demanding headphones may benefit from a more powerful dedicated amplifier.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: How portable is the Fosi Audio MD3 MagDAC?\u003c\/strong\u003e\u003cbr\u003e A: The MD3 measures just 70 × 45 × 12mm and weighs approximately 50 grams without its cable. Its slim design, rounded corners, premium exterior finish, and magnetic attachment make it convenient for commuting, traveling, working, and listening to high-resolution music on the go.\u003c\/p\u003e","brand":"Fosi Audio","offers":[{"title":"Silver","offer_id":62887248461983,"sku":"FOS-MD3-SIL","price":149.99,"currency_code":"USD","in_stock":true},{"title":"Black","offer_id":62887248494751,"sku":"FOS-MD3-BLK","price":149.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0495\/6910\/4031\/files\/067fc934-aa02-4ee7-ad46-42c811a3e7ad.jpg?v=1791559753"},{"product_id":"fosi-audio-za3-balanced-2-1-channel-power-amplifier","title":"Fosi Audio ZA3 Balanced 2.1-Channel Power Amplifier","description":"\u003ch3\u003eFosi Audio ZA3 Balanced 2.1-Channel Power Amplifier\u003c\/h3\u003e  \u003cp\u003eExperience powerful, high-fidelity sound with the Fosi Audio ZA3 Balanced 2.1-Channel Power Amplifier, a compact yet versatile Class-D amplifier designed for audiophiles looking to build or upgrade a stereo Hi-Fi system. Powered by the Texas Instruments TPA3255 amplifier chip, the ZA3 delivers 155 watts per channel into 4 ohms in stereo mode or 235 watts into 4 ohms in mono mode when paired with its included 48V\/5A power supply. With balanced XLR and 1\/4-inch TRS inputs, standard RCA connectivity, and a dedicated powered subwoofer output, the ZA3 combines impressive amplification performance with the flexibility to accommodate a wide range of audio systems.\u003c\/p\u003e  \u003cp\u003eDesigned with versatility in mind, the ZA3 features switchable stereo and mono operating modes, allowing it to power a pair of passive speakers or operate as a dedicated monoblock amplifier. For listeners looking to expand their system, two ZA3 amplifiers can be configured in mono mode to independently power the left and right speakers. The balanced XLR\/TRS combo inputs provide improved resistance to electrical interference and unwanted noise, making the ZA3 an excellent companion for compatible DACs, preamplifiers, and other high-quality audio components. A dedicated RCA subwoofer output also makes it easy to add a powered subwoofer for deeper bass and a more immersive 2.1-channel listening experience.\u003c\/p\u003e  \u003cp\u003eInside its compact aluminum alloy chassis, the ZA3 incorporates premium components, including Japanese NCC and ELNA capacitors, German WIMA capacitors, and Japanese Sumida inductors. Its carefully optimized circuitry delivers a signal-to-noise ratio of at least 106dB, total harmonic distortion below 0.006%, and a SINAD rating of 89dB for clean, detailed sound reproduction. Advanced heat management uses an enlarged chassis, side-mounted ventilation, and protective dust covers to maintain stable performance during extended listening sessions. Five replaceable DIP8 op-amp sockets also provide the opportunity to customize the amplifier's sound using compatible aftermarket operational amplifiers.\u003c\/p\u003e  \u003cp\u003eThe Fosi Audio ZA3 is equally focused on convenience and everyday usability. A 12V trigger input allows automatic power synchronization with compatible audio components, while a precision taper-A volume potentiometer provides smooth, controlled volume adjustments. Its one-piece aluminum alloy enclosure combines an understated modern appearance with durable construction, making it an excellent fit for desktop audio setups, compact listening rooms, and dedicated stereo systems. Whether you're powering bookshelf speakers, adding a subwoofer, or building a dual-mono Hi-Fi system, the ZA3 delivers flexible, high-performance amplification in a space-saving design.\u003c\/p\u003e  \u003ch4\u003eSpecifications\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Fosi Audio\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e ZA3\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e ZA3-48V5A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Balanced Class-D stereo\/mono power amplifier\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eChannel Configuration:\u003c\/strong\u003e 2.0-channel amplification with powered subwoofer output for 2.1-channel systems\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmplifier Class:\u003c\/strong\u003e Class-D\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmplifier Chip:\u003c\/strong\u003e Texas Instruments TPA3255\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOperating Modes:\u003c\/strong\u003e Stereo and PBTL mono\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eStereo Output Power with 48V\/5A Power Supply:\u003c\/strong\u003e 155 watts × 2 into 4 ohms RMS\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMono Output Power with 48V\/5A Power Supply:\u003c\/strong\u003e 235 watts × 1 into 4 ohms RMS\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eStereo Output Power with 32V\/5A Power Supply:\u003c\/strong\u003e 95 watts × 2 into 4 ohms\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMono Output Power with 32V\/5A Power Supply:\u003c\/strong\u003e 110 watts × 1 into 4 ohms\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIncluded Power Supply:\u003c\/strong\u003e 48V\/5A DC power adapter\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSupported Input Voltage:\u003c\/strong\u003e DC 24–48V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSupported Speaker Impedance:\u003c\/strong\u003e 2–8 ohms\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e 20Hz–20kHz (±0.1dB)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSignal-to-Noise Ratio:\u003c\/strong\u003e At least 106dB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDynamic Range:\u003c\/strong\u003e At least 106dB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSignal-to-Noise and Distortion Ratio (SINAD):\u003c\/strong\u003e 89dB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTotal Harmonic Distortion (THD):\u003c\/strong\u003e Less than 0.006%\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNoise Floor:\u003c\/strong\u003e Approximately 150µV\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eInput Sensitivity:\u003c\/strong\u003e 0.775V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBalanced Audio Inputs:\u003c\/strong\u003e Stereo XLR\/1\/4-inch TRS combo connections\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUnbalanced Audio Input:\u003c\/strong\u003e Stereo RCA\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSpeaker Outputs:\u003c\/strong\u003e Two pairs of binding-post terminals\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSpeaker Wire Compatibility:\u003c\/strong\u003e Banana plugs and bare speaker wire\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSubwoofer Output:\u003c\/strong\u003e One RCA line-level output for a powered subwoofer\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e12V Trigger:\u003c\/strong\u003e 3.5mm 12V trigger input for synchronized power operation\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eInput Selection:\u003c\/strong\u003e Switchable RCA and balanced inputs\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVolume Control:\u003c\/strong\u003e Taper-A potentiometer\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVolume Memory:\u003c\/strong\u003e Remembers the previous volume setting after powering off\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eReplaceable Op-Amps:\u003c\/strong\u003e Five swappable DIP8 dual operational amplifier positions\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOp-Amp Locations:\u003c\/strong\u003e Left channel, right channel, balanced input, and subwoofer signal stages\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCompatible Op-Amp Examples:\u003c\/strong\u003e Sparkos SS3602, MUSES02, OPA2604, OPA2134PA, OP249, AD827, LM4562, and other compatible DIP8 dual op-amps\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCapacitors:\u003c\/strong\u003e Japanese NCC, Japanese ELNA, and German WIMA components\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eInductors:\u003c\/strong\u003e Japanese Sumida components\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCircuit Design:\u003c\/strong\u003e Optimized internal layout to minimize interference between audio circuitry sections\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCooling System:\u003c\/strong\u003e Side-mounted ventilation with protective dust covers and an enlarged heat-dissipating chassis\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eChassis Material:\u003c\/strong\u003e Aluminum alloy\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e One-piece molded enclosure with sandblasted exterior finish\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e Approximately 6.1 × 7.2 × 2 inches (15.5 × 18.4 × 5.1cm)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eListed Weight:\u003c\/strong\u003e Approximately 3.92 lbs (1.78kg)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Connectivity:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eWi-Fi Connectivity:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBuilt-In DAC:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePhono Preamplifier:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eEAN:\u003c\/strong\u003e 6976136960270\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer Warranty:\u003c\/strong\u003e 24-month limited warranty\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIncluded Accessories:\u003c\/strong\u003e Fosi Audio ZA3 power amplifier, 48V\/5A power adapter, power cord, and user manual\u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003eWhat It's Great At\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003ePowerful Class-D Stereo Amplification:\u003c\/strong\u003e The Texas Instruments TPA3255 amplifier chip delivers 155 watts per channel into 4 ohms with the included 48V\/5A power supply, providing substantial power for compatible passive bookshelf and floorstanding speakers.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eFlexible Stereo and Mono Operation:\u003c\/strong\u003e Switch between traditional two-channel stereo amplification and 235-watt mono operation, or pair two ZA3 amplifiers for a dedicated dual-mono Hi-Fi system.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eBalanced High-Fidelity Audio Connectivity:\u003c\/strong\u003e XLR and 1\/4-inch TRS combo inputs provide noise-resistant balanced connections for compatible DACs and preamplifiers, while standard RCA inputs offer straightforward integration with traditional audio sources.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eEasy 2.1-Channel System Expansion:\u003c\/strong\u003e A dedicated RCA subwoofer output allows the ZA3 to connect to a powered subwoofer, bringing additional low-frequency impact to music, movies, and everyday listening.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eCustomizable Audiophile Performance:\u003c\/strong\u003e Five replaceable DIP8 op-amp positions let enthusiasts experiment with compatible operational amplifiers to tailor the ZA3's sonic characteristics to their preferences.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003ePremium Components and Efficient Cooling:\u003c\/strong\u003e High-quality Japanese and German audio components, an optimized circuit layout, and upgraded side ventilation support clean, stable amplification in a compact aluminum chassis.\u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003eFAQ Section\u003c\/h4\u003e  \u003cp\u003e\u003cstrong\u003eQ: How much power does the Fosi Audio ZA3 deliver?\u003c\/strong\u003e\u003cbr\u003e A: With the included 48V\/5A power supply, the Fosi Audio ZA3 delivers 155 watts per channel into 4 ohms in stereo mode or 235 watts into 4 ohms in mono mode. Output power varies depending on the connected speaker impedance, power supply, and operating configuration.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can the Fosi Audio ZA3 operate as a monoblock amplifier?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The ZA3 features a switchable mono mode that allows it to function as a dedicated monoblock power amplifier. Using two ZA3 units in mono mode allows each amplifier to power an individual speaker, creating a dual-mono stereo system with independent amplification for the left and right channels.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio ZA3 support balanced XLR connections?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The ZA3 includes balanced XLR\/1\/4-inch TRS combo inputs that help reduce unwanted interference and noise when connected to compatible balanced audio equipment. It also features standard RCA inputs for conventional unbalanced audio sources.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can I connect a subwoofer to the Fosi Audio ZA3?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The ZA3 includes a dedicated RCA subwoofer line output for connecting a powered subwoofer. This allows you to expand a traditional stereo system into a 2.1-channel configuration with additional bass support. The output is designed for powered subwoofers and cannot directly drive a passive subwoofer.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: What speakers are compatible with the Fosi Audio ZA3?\u003c\/strong\u003e\u003cbr\u003e A: The ZA3 supports passive speakers with nominal impedances from 2 to 8 ohms. It can be used with many bookshelf and floorstanding speakers, although overall performance depends on speaker sensitivity, impedance, listening volume, and room size. Speaker connections support banana plugs or bare speaker wire.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can I change the op-amps in the Fosi Audio ZA3?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The ZA3 features five replaceable DIP8 dual op-amp positions, allowing enthusiasts to customize portions of the audio circuitry. Compatible alternatives include models such as the Sparkos SS3602, MUSES02, OPA2134PA, and LM4562. Always verify electrical compatibility, correct orientation, and safe installation procedures before replacing an op-amp.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio ZA3 have Bluetooth or a built-in DAC?\u003c\/strong\u003e\u003cbr\u003e A: No. The ZA3 is a dedicated analog power amplifier and does not include Bluetooth, Wi-Fi, or a built-in digital-to-analog converter. To stream digital music, connect a compatible external DAC, network streamer, or other source component with an appropriate analog output.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can I connect a turntable to the Fosi Audio ZA3?\u003c\/strong\u003e\u003cbr\u003e A: Yes, but the turntable must have a built-in phono preamplifier or be connected through a separate external phono preamp. The ZA3 does not include a dedicated phono stage, so a turntable's raw phono-level signal must be converted to line level before connecting to the amplifier's RCA inputs.\u003c\/p\u003e","brand":"Fosi Audio","offers":[{"title":"Default Title","offer_id":62887250100383,"sku":"FOS-ZA3-48-BLK","price":149.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0495\/6910\/4031\/files\/4696cbb5-d9cb-41df-a153-2f07f17e42e2.jpg?v=1791560627"},{"product_id":"fosi-audio-bt20a-max-bluetooth-2-1-channel-stereo-amplifier","title":"Fosi Audio BT20A MAX Bluetooth 2.1-Channel Stereo Amplifier","description":"\u003ch3\u003eFosi Audio BT20A MAX Bluetooth 2.1-Channel Stereo Amplifier\u003c\/h3\u003e  \u003cp\u003eBring powerful, high-fidelity sound to your home audio system with the Fosi Audio BT20A MAX Bluetooth 2.1-Channel Stereo Amplifier, a compact yet versatile Class-D amplifier designed for music enthusiasts who want exceptional sound quality, modern wireless connectivity, and flexible system integration. Powered by the Texas Instruments TPA3255 amplifier chip with advanced Post-Filter Feedback (PFFB) technology, the BT20A MAX delivers 180 watts RMS per channel into 4 ohms, with a maximum rated output of 300 watts per channel. Featuring Bluetooth 6.0 with LDAC and aptX Lossless support, dual RCA inputs, a dedicated subwoofer output, and an included remote control, the BT20A MAX combines powerful amplification with convenient everyday operation.\u003c\/p\u003e  \u003cp\u003eEngineered for clean, detailed sound reproduction, the BT20A MAX incorporates PFFB technology to minimize distortion and maintain consistent performance across a wide range of speaker loads. Its optimized circuitry features independent digital and analog power supply sections, helping reduce electrical interference and preserve musical detail. With a signal-to-noise ratio of at least 112dB, total harmonic distortion plus noise of 0.003% or less, and a SINAD rating of at least 96dB, the amplifier delivers excellent clarity, dynamic range, and precise stereo imaging. An enhanced cooling system with a built-in quiet fan improves cooling efficiency by approximately 30% compared with the BT20A Pro, supporting stable operation during extended listening sessions.\u003c\/p\u003e  \u003cp\u003eWireless streaming is equally impressive thanks to the integrated Qualcomm QCC3095 Bluetooth processor. Supporting Bluetooth 6.0 and premium audio codecs including LDAC, aptX Lossless, aptX HD, aptX Adaptive, aptX, AAC, and SBC, the BT20A MAX offers high-quality wireless playback from compatible smartphones, tablets, computers, and other Bluetooth devices. With support for audio resolutions up to 24-bit\/96kHz through compatible Bluetooth connections, listeners can enjoy detailed wireless music playback without the complexity of additional streaming components. Two stereo RCA inputs also provide convenient connections for external DACs, CD players, streamers, and turntables equipped with an appropriate phono preamplifier.\u003c\/p\u003e  \u003cp\u003eDesigned to serve as the centerpiece of a compact stereo or 2.1-channel system, the BT20A MAX includes a dedicated RCA subwoofer output for connecting a powered subwoofer. A switchable 80Hz high-pass filter lets your main speakers focus on frequencies above 80Hz while a connected subwoofer handles deeper bass, helping improve clarity and reduce unnecessary low-frequency demands on smaller speakers. Adjustable bass and treble controls allow you to personalize your listening experience, while a dedicated Bypass mode disables the tone adjustments for a more direct audio signal.\u003c\/p\u003e  \u003cp\u003eThe Fosi Audio BT20A MAX also offers thoughtful features that make everyday listening more convenient. Its motorized analog volume potentiometer provides smooth, precise volume adjustments from the front panel or the included infrared remote, which also controls power, input selection, Bluetooth playback, and other functions. A dedicated 12V trigger input enables synchronized power on\/off with compatible audio components, while its compact enclosure makes it an excellent fit for desktop systems, small listening rooms, and modern Hi-Fi setups. Whether you're upgrading a traditional stereo system, adding wireless streaming, or building a versatile 2.1-channel audio setup, the BT20A MAX delivers powerful performance in a convenient, space-saving design.\u003c\/p\u003e  \u003ch4\u003eSpecifications\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Fosi Audio\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e BT20A MAX\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Bluetooth stereo integrated amplifier with powered subwoofer output\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmplifier Class:\u003c\/strong\u003e Class-D\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eChannel Configuration:\u003c\/strong\u003e 2.0 stereo \/ 2.1 with powered subwoofer\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmplifier Chip:\u003c\/strong\u003e Texas Instruments TPA3255\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOperational Amplifier Chip:\u003c\/strong\u003e NE5532\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmplifier Technology:\u003c\/strong\u003e Post-Filter Feedback (PFFB)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMaximum Rated Output Power:\u003c\/strong\u003e 300 watts × 2 at 4 ohms\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRMS Output Power:\u003c\/strong\u003e 180 watts × 2 at 4 ohms\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSupported Speaker Impedance:\u003c\/strong\u003e 2–8 ohms\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e 20Hz–20kHz (±0.5dB)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSignal-to-Noise Ratio:\u003c\/strong\u003e At least 112dB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTotal Harmonic Distortion + Noise:\u003c\/strong\u003e 0.003% or less\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSINAD:\u003c\/strong\u003e At least 96dB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePower Supply Architecture:\u003c\/strong\u003e Independent digital and analog power supply sections\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIncluded Power Supply:\u003c\/strong\u003e 48V\/5A DC power adapter, standard version\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSupported DC Voltage Range:\u003c\/strong\u003e 32–48V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAnalog Audio Inputs:\u003c\/strong\u003e 2 stereo RCA input pairs (RCA1 and RCA2)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eWireless Audio Input:\u003c\/strong\u003e Bluetooth\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSpeaker Outputs:\u003c\/strong\u003e Left and right binding-post speaker terminals\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSubwoofer Output:\u003c\/strong\u003e 1 RCA line-level output for a powered subwoofer\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e12V Trigger:\u003c\/strong\u003e 1 trigger input for synchronized power control\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Version:\u003c\/strong\u003e 6.0\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Processor:\u003c\/strong\u003e Qualcomm QCC3095\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Device Name:\u003c\/strong\u003e Fosi Audio BT20A MAX\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Audio Codecs:\u003c\/strong\u003e SBC, AAC, aptX, aptX HD, aptX Adaptive, aptX Lossless, and LDAC\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMaximum Bluetooth Audio Resolution:\u003c\/strong\u003e Up to 24-bit\/96kHz PCM with compatible sources and codecs\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Wireless Range:\u003c\/strong\u003e Up to 15 meters (approximately 50 feet) under suitable conditions\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eInput Selection:\u003c\/strong\u003e Dedicated front-panel power\/input selection button\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eInput Indicators:\u003c\/strong\u003e LEDs for Bluetooth, RCA1, and RCA2\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVolume Control:\u003c\/strong\u003e Motorized analog potentiometer\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTone Controls:\u003c\/strong\u003e Independent bass and treble adjustment\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTone Bypass:\u003c\/strong\u003e Dedicated rear-panel Tone\/Bypass switch\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHigh-Pass Filter:\u003c\/strong\u003e Switchable 80Hz HPF for main speaker outputs\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHigh-Pass Filter Control:\u003c\/strong\u003e Rear-panel on\/off switch\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRemote Control:\u003c\/strong\u003e Included infrared remote\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRemote Functions:\u003c\/strong\u003e Power on\/off, mute, volume adjustment, input selection, Bluetooth reset, and Bluetooth playback controls\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRemote Battery Requirement:\u003c\/strong\u003e 2 AAA batteries, not included\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e12V Trigger Function:\u003c\/strong\u003e Automatically powers the amplifier on\/off with a compatible component providing a 12V trigger signal\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCooling System:\u003c\/strong\u003e Integrated quiet fan and optimized chassis ventilation\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCooling Efficiency:\u003c\/strong\u003e Approximately 30% improved cooling efficiency compared with the BT20A Pro\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRecommended Speaker Type:\u003c\/strong\u003e Passive bookshelf or floorstanding speakers\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSubwoofer Compatibility:\u003c\/strong\u003e Powered subwoofers with compatible RCA line-level inputs\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Antenna:\u003c\/strong\u003e External detachable antenna\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eWi-Fi Connectivity:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHDMI Connectivity:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOptical\/Coaxial Digital Inputs:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBuilt-In Phono Preamplifier:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHeadphone Output:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer Warranty:\u003c\/strong\u003e 24-month limited warranty\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIncluded Accessories:\u003c\/strong\u003e Fosi Audio BT20A MAX amplifier, Bluetooth antenna, infrared remote control, 48V\/5A power adapter, and user manual\u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003eWhat It's Great At\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003ePowerful Class-D Stereo Amplification:\u003c\/strong\u003e The Texas Instruments TPA3255 amplifier delivers 180 watts RMS per channel into 4 ohms, providing substantial power for compatible passive bookshelf and floorstanding speakers.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eHigh-Resolution Bluetooth 6.0 Streaming:\u003c\/strong\u003e The Qualcomm QCC3095 processor supports LDAC, aptX Lossless, aptX HD, aptX Adaptive, and other Bluetooth codecs for high-quality wireless music playback from compatible devices.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eClean, Detailed Audio with PFFB Technology:\u003c\/strong\u003e Post-Filter Feedback circuitry, independent power supply sections, and a signal-to-noise ratio of at least 112dB help deliver precise stereo imaging, low distortion, and excellent musical clarity.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eVersatile 2.1-Channel System Integration:\u003c\/strong\u003e Dual RCA inputs, a dedicated powered subwoofer output, and a switchable 80Hz high-pass filter make it easy to build a complete stereo system with deeper bass and improved speaker performance.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eConvenient Remote and Audio Controls:\u003c\/strong\u003e A motorized analog volume control, included infrared remote, independent bass and treble adjustments, and Tone Bypass mode provide convenient control over your listening experience.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eReliable Performance and Smart Power Management:\u003c\/strong\u003e An enhanced cooling system and 12V trigger input help maintain stable amplification while making the BT20A MAX easy to integrate with other compatible Hi-Fi components.\u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003eFAQ Section\u003c\/h4\u003e  \u003cp\u003e\u003cstrong\u003eQ: How much power does the Fosi Audio BT20A MAX deliver?\u003c\/strong\u003e\u003cbr\u003e A: The Fosi Audio BT20A MAX is rated to deliver 180 watts RMS per channel into 4 ohms, with a maximum advertised output of 300 watts per channel into 4 ohms. Powered by the Texas Instruments TPA3255 Class-D amplifier chip, it provides substantial amplification for compatible passive speakers. Actual output depends on speaker impedance, power supply, and listening conditions.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio BT20A MAX support Bluetooth streaming?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The BT20A MAX features Bluetooth 6.0 powered by the Qualcomm QCC3095 processor. It supports SBC, AAC, aptX, aptX HD, aptX Adaptive, aptX Lossless, and LDAC codecs, with audio resolutions up to 24-bit\/96kHz when paired with compatible Bluetooth sources and codecs.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can I connect a subwoofer to the Fosi Audio BT20A MAX?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The BT20A MAX features a dedicated RCA subwoofer output for connecting a powered subwoofer. It also includes a switchable 80Hz high-pass filter that reduces low-frequency output to the main speakers, allowing them to focus on midrange and higher frequencies while the subwoofer provides deeper bass. The subwoofer output cannot directly power a passive subwoofer.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio BT20A MAX have a 12V trigger?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The BT20A MAX includes a dedicated 12V trigger input that enables synchronized power on\/off with a compatible preamplifier, DAC, streamer, or other component equipped with a 12V trigger output.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: What audio inputs are available on the Fosi Audio BT20A MAX?\u003c\/strong\u003e\u003cbr\u003e A: The BT20A MAX includes two stereo RCA analog input pairs and Bluetooth wireless connectivity. The RCA connections can accommodate compatible CD players, DACs, streamers, and other line-level sources, while Bluetooth provides wireless audio streaming from smartphones, tablets, and computers. Only one input source can be selected at a time.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can I adjust the bass and treble on the Fosi Audio BT20A MAX?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The BT20A MAX includes independent bass and treble controls for adjusting the sound to your preferences. A rear-panel Tone\/Bypass switch lets you disable these adjustments when you prefer a more direct audio signal without the amplifier's internal tone processing.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio BT20A MAX include a remote control?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The BT20A MAX includes an infrared remote that controls power, volume, mute, input selection, and Bluetooth playback functions. Its motorized analog volume knob physically adjusts when volume changes are made using the remote. The remote requires two AAA batteries, which are not included.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can I connect a turntable to the Fosi Audio BT20A MAX?\u003c\/strong\u003e\u003cbr\u003e A: Yes. A turntable can connect to either RCA input, provided it has a built-in phono preamplifier or is connected through an external phono preamp. The BT20A MAX does not include a dedicated phono stage, so a turntable's phono-level signal must be converted to line level before playback.\u003c\/p\u003e","brand":"Fosi Audio","offers":[{"title":"Default Title","offer_id":62887252328607,"sku":"FOS-BT20AMAX-BLK","price":249.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0495\/6910\/4031\/files\/720a6638-0346-4917-a2c7-2c1aad82f77b.jpg?v=1791561327"},{"product_id":"fosi-audio-merak-cd-player-with-dac-headphone-amplifier","title":"Fosi Audio MERAK CD Player with DAC \u0026 Headphone Amplifier","description":"\u003ch3\u003eFosi Audio MERAK CD Player with DAC \u0026amp; Headphone Amplifier\u003c\/h3\u003e  \u003cp\u003eRediscover your favorite albums with the Fosi Audio MERAK CD Player, a compact, high-fidelity desktop CD player designed to bring exceptional sound quality, modern connectivity, and convenient digital features to your music collection. Combining a precision CD transport, Cirrus Logic CS43131 digital-to-analog converter, and Texas Instruments TPA6120 headphone amplifier, the MERAK delivers detailed, low-distortion sound whether you're listening through headphones, powered speakers, or a dedicated Hi-Fi system. With USB flash drive playback, one-touch CD ripping, optical digital and analog audio outputs, and a 12V trigger output, the MERAK offers a versatile way to enjoy physical media while integrating seamlessly into modern audio systems.\u003c\/p\u003e  \u003cp\u003eEngineered for accurate and reliable CD playback, the MERAK features a dedicated CD mechanism with an optimized servo system that ensures precise disc reading and smooth operation. Its top-loading design provides easy access to your favorite discs, while gapless playback preserves the uninterrupted flow of live albums, classical recordings, and other continuous performances. Built-in Electronic Skip Protection (ESP) provides up to 60 seconds of audio buffering to help prevent playback interruptions caused by vibration or movement. Compatible with standard audio CDs, supported CD-R and CD-RW discs, and the standard CD layer of hybrid SACDs, the MERAK makes it easy to revisit your physical music collection with excellent clarity and consistency.\u003c\/p\u003e  \u003cp\u003eAt the heart of the MERAK is a carefully selected audio chipset consisting of an SC6137D processing chip, Cirrus Logic CS43131 DAC, and Texas Instruments TPA6120 headphone amplifier. The dedicated 3.5mm headphone output delivers at least 210mW per channel into 32 ohms, providing ample power for a wide range of wired headphones with impedances from 16 to 300 ohms. For integration with larger audio systems, the analog line output delivers at least 2Vrms with a signal-to-noise ratio of 124dB and total harmonic distortion plus noise of just 0.0009%. An optical digital output also allows the MERAK to function as a dedicated CD transport, sending a bit-perfect 16-bit\/44.1kHz signal to a compatible external DAC or digital-equipped amplifier.\u003c\/p\u003e  \u003cp\u003eBeyond traditional CD playback, the Fosi Audio MERAK adds convenient ways to enjoy and preserve your music collection. Its USB-A port supports direct playback from compatible flash drives with MP3, WAV, FLAC, AAC, APE, and WMA files. A built-in CD ripping function allows you to convert audio CDs directly into uncompressed 16-bit\/44.1kHz WAV files on a compatible FAT32-formatted USB drive without using a computer. Whether you want to digitize an older collection or listen to music stored on a flash drive, the MERAK combines physical and digital playback in one easy-to-use device.\u003c\/p\u003e  \u003cp\u003eDesigned for everyday convenience, the MERAK features a high-contrast OLED display that shows track information, playback status, and elapsed time, along with intuitive front-panel controls and a distinctive side-mounted volume slider. The included infrared remote offers convenient control over playback, track selection, and listening modes from up to 7 meters away. Its 3.5mm analog line output connects to compatible amplifiers and powered speakers, while the optical output accommodates external DACs. A dedicated 12V trigger output can also synchronize power with compatible components such as the Fosi Audio ZA3 amplifier. With its compact design, flexible connectivity, and impressive audio performance, the Fosi Audio MERAK is an excellent choice for music lovers looking to bring their CD collection back into their everyday listening experience.\u003c\/p\u003e  \u003ch4\u003eSpecifications\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Fosi Audio\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e MERAK\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Desktop CD player, CD transport, DAC, and headphone amplifier\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCD Mechanism:\u003c\/strong\u003e Precision top-loading CD transport with optimized servo system\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAudio Processing Chip:\u003c\/strong\u003e SC6137D\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDAC Chip:\u003c\/strong\u003e Cirrus Logic CS43131\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHeadphone Amplifier Chip:\u003c\/strong\u003e Texas Instruments TPA6120\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCD Playback:\u003c\/strong\u003e Standard audio CDs and compatible recordable discs\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSupported Disc Formats:\u003c\/strong\u003e CDDA, CD-R, and CD-RW (partial compatibility)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRecommended Disc Type:\u003c\/strong\u003e Original pressed audio CDs\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSupported CD-R File Formats:\u003c\/strong\u003e FLAC, WAV, WMA, AAC, and MP3\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSACD Compatibility:\u003c\/strong\u003e CD layer of hybrid SACDs only; high-resolution SACD layer is not supported\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMaximum CD Audio Sampling Rate:\u003c\/strong\u003e PCM 16-bit\/96kHz (manufacturer-listed decoding specification)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eStandard Audio CD Resolution:\u003c\/strong\u003e PCM 16-bit\/44.1kHz\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMaximum USB Audio Sampling Rate:\u003c\/strong\u003e PCM 16-bit\/96kHz\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUSB Drive Audio Formats:\u003c\/strong\u003e MP3, WAV, FLAC, AAC, APE, and WMA\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUSB Playback Capacity:\u003c\/strong\u003e Supports compatible USB flash drives up to 128GB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUSB File System:\u003c\/strong\u003e FAT32\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCD Ripping:\u003c\/strong\u003e Direct audio CD extraction to USB flash drive\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCD Ripping File Format:\u003c\/strong\u003e Uncompressed WAV\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCD Ripping Resolution:\u003c\/strong\u003e 16-bit\/44.1kHz\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCD Ripping USB Requirements:\u003c\/strong\u003e FAT32-formatted USB flash drive up to 32GB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eGapless Playback:\u003c\/strong\u003e Supported\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eElectronic Skip Protection:\u003c\/strong\u003e ESP anti-skip buffering\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eESP Buffer:\u003c\/strong\u003e Up to 60 seconds\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eESP Control:\u003c\/strong\u003e Dedicated rear-panel on\/off switch\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePlayback Modes:\u003c\/strong\u003e Play Once, Repeat One, Repeat All, and Shuffle\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAudio Inputs:\u003c\/strong\u003e CD transport and USB-A flash drive input\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHeadphone Output:\u003c\/strong\u003e 1 × 3.5mm single-ended stereo output\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAnalog Line Output:\u003c\/strong\u003e 1 × 3.5mm stereo line-level output\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDigital Audio Output:\u003c\/strong\u003e 1 × optical TOSLINK\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOptical CD Output Resolution:\u003c\/strong\u003e Bit-perfect PCM 16-bit\/44.1kHz\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e12V Trigger:\u003c\/strong\u003e 1 × 12V trigger output\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e12V Trigger Function:\u003c\/strong\u003e Synchronized power control for compatible downstream components\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUSB-A Port:\u003c\/strong\u003e Flash drive playback, CD ripping, and firmware updates\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUSB-C Port:\u003c\/strong\u003e DC power input\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHeadphone Impedance Compatibility:\u003c\/strong\u003e 16–300 ohms\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHeadphone Output Power:\u003c\/strong\u003e At least 210mW + 210mW into 32 ohms (THD+N below 1%)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHeadphone Output Signal-to-Noise Ratio:\u003c\/strong\u003e 121dB (A-weighted)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHeadphone Output THD+N:\u003c\/strong\u003e 0.002% (A-weighted)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHeadphone Output Dynamic Range:\u003c\/strong\u003e 121dB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHeadphone Output Noise Floor:\u003c\/strong\u003e 3µV or less (A-weighted)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAnalog Line Output Level:\u003c\/strong\u003e At least 2Vrms\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAnalog Line Output Signal-to-Noise Ratio:\u003c\/strong\u003e 124dB (A-weighted)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAnalog Line Output THD+N:\u003c\/strong\u003e 0.0009% (A-weighted)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAnalog Line Output Dynamic Range:\u003c\/strong\u003e 124dB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAnalog Line Output Noise Floor:\u003c\/strong\u003e 3µV or less (A-weighted)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDisplay:\u003c\/strong\u003e High-contrast OLED display\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDisplay Information:\u003c\/strong\u003e Track number, playback status, and elapsed playback time\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDisc Loading:\u003c\/strong\u003e Top-loading lid with clip-style disc holder\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDisc Safety:\u003c\/strong\u003e Hall sensor automatically stops playback when the lid is opened\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVolume Control:\u003c\/strong\u003e Side-mounted sliding volume control\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFront-Panel Controls:\u003c\/strong\u003e Power\/input selection, play\/pause, previous track, next track, stop, and CD ripping\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRemote Control:\u003c\/strong\u003e Included infrared remote\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRemote Operating Range:\u003c\/strong\u003e Up to 7 meters (approximately 23 feet)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRemote Functions:\u003c\/strong\u003e Playback, track selection, listening modes, volume, and input\/output control\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFirmware Updates:\u003c\/strong\u003e Supported through USB-A using a USB flash drive\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePower Requirement:\u003c\/strong\u003e DC 5V\/2A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePower Connection:\u003c\/strong\u003e USB-C\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBuilt-In Battery:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBuilt-In Speakers:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Connectivity:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eWi-Fi Connectivity:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUSB DAC Computer Input:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eEnvironmental Compliance:\u003c\/strong\u003e RoHS 2.0 and REACH\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer Warranty:\u003c\/strong\u003e 24-month limited warranty\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIncluded Accessories:\u003c\/strong\u003e Fosi Audio MERAK CD Player, USB-A to USB-C cable, infrared remote control, and user manual\u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003eWhat It's Great At\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003ePrecision CD Playback:\u003c\/strong\u003e A dedicated CD transport with an optimized servo mechanism and gapless playback delivers reliable, uninterrupted listening for standard audio CDs and supported recordable discs.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eHigh-Fidelity DAC and Headphone Amplification:\u003c\/strong\u003e The Cirrus Logic CS43131 DAC and Texas Instruments TPA6120 headphone amplifier provide clean, detailed audio with at least 210mW per channel at 32 ohms for compatible wired headphones.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eConvenient CD Ripping and USB Playback:\u003c\/strong\u003e Convert audio CDs directly into lossless 16-bit\/44.1kHz WAV files on a compatible USB drive, or play MP3, FLAC, WAV, and other supported digital music formats without a computer.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eFlexible Analog and Digital Outputs:\u003c\/strong\u003e A 3.5mm headphone output, analog line output, and optical digital output allow the MERAK to connect directly to headphones, powered speakers, external amplifiers, or a dedicated DAC.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eReliable Playback with Anti-Skip Protection:\u003c\/strong\u003e Built-in ESP technology provides up to 60 seconds of buffering to help minimize playback interruptions caused by vibration, while the top-loading mechanism offers convenient disc access.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eConvenient System Integration and Control:\u003c\/strong\u003e An OLED display, included infrared remote, adjustable volume slider, and 12V trigger output make the MERAK easy to operate and integrate into a compact desktop or full-size Hi-Fi system.\u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003eFAQ Section\u003c\/h4\u003e  \u003cp\u003e\u003cstrong\u003eQ: What is the Fosi Audio MERAK CD Player?\u003c\/strong\u003e\u003cbr\u003e A: The Fosi Audio MERAK is a compact desktop CD player that combines a dedicated CD transport, Cirrus Logic CS43131 DAC, and Texas Instruments TPA6120 headphone amplifier. It supports standard CD playback, USB flash drive audio, CD ripping, and multiple audio outputs for connecting headphones, powered speakers, amplifiers, and external DACs.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: What types of CDs can the Fosi Audio MERAK play?\u003c\/strong\u003e\u003cbr\u003e A: The MERAK supports standard audio CDs (CDDA) and offers partial compatibility with CD-R and CD-RW discs. It can also play the standard CD layer of compatible hybrid SACDs, but it does not support the high-resolution SACD layer. Original pressed audio CDs are recommended for the most reliable playback.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can the Fosi Audio MERAK rip CDs to a USB drive?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The MERAK includes a built-in CD ripping function that converts audio CDs into uncompressed 16-bit\/44.1kHz WAV files without requiring a computer. For CD ripping, use a FAT32-formatted USB flash drive with a capacity of 32GB or less.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio MERAK support USB music playback?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The rear USB-A port supports direct music playback from compatible flash drives up to 128GB. Supported audio formats include MP3, WAV, FLAC, AAC, APE, and WMA, with decoding support up to 16-bit\/96kHz. The USB-A port also supports CD ripping and firmware updates.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can I connect the Fosi Audio MERAK directly to headphones?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The MERAK includes a dedicated 3.5mm headphone output powered by a Texas Instruments TPA6120 amplifier. It delivers at least 210mW per channel at 32 ohms and supports headphones with impedances ranging from 16 to 300 ohms, making it suitable for many wired headphones and in-ear monitors.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio MERAK have optical and analog audio outputs?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The MERAK features a 3.5mm stereo analog line output for connecting to compatible amplifiers or powered speakers, along with an optical TOSLINK output for connection to an external DAC or digital-equipped amplifier. When used as a CD transport, the optical output delivers a bit-perfect 16-bit\/44.1kHz digital audio signal.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio MERAK have a 12V trigger?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The MERAK includes a 12V trigger output that can automatically synchronize power with compatible downstream audio components. This makes it useful when paired with equipment such as the Fosi Audio ZA3 amplifier that supports a 12V trigger input.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio MERAK have Bluetooth or a built-in battery?\u003c\/strong\u003e\u003cbr\u003e A: No. The MERAK does not include Bluetooth, Wi-Fi, or a built-in rechargeable battery. It is designed for desktop and home audio use and requires a DC 5V\/2A power source through its USB-C power connection. It also does not include built-in speakers, so audio playback requires connected headphones or an external audio system.\u003c\/p\u003e","brand":"Fosi Audio","offers":[{"title":"Default Title","offer_id":62887253409951,"sku":"FOS-MERAK-SIL","price":139.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0495\/6910\/4031\/files\/5441ae19-b5e6-4f54-a205-0a1b6906071e.jpg?v=1791561962"},{"product_id":"fosi-audio-lc30-vu-meter-amplifier-speaker-selector","title":"Fosi Audio LC30 VU Meter Amplifier \u0026 Speaker Selector","description":"\u003ch3\u003eFosi Audio LC30 VU Meter Amplifier \u0026amp; Speaker Selector\u003c\/h3\u003e  \u003cp\u003eBring flexibility, convenience, and classic Hi-Fi styling to your audio system with the Fosi Audio LC30 VU Meter Amplifier \u0026amp; Speaker Selector. Designed for audiophiles who want to compare or switch between multiple amplifiers and speakers without constantly reconnecting cables, the LC30 accommodates up to two stereo amplifiers and two pairs of passive speakers. Its dual analog VU meters provide a visually engaging display of audio signal levels, while convenient front-panel controls and an included infrared remote make switching between components quick and effortless. Supporting up to 250 watts per channel into 4 ohms, the LC30 combines high-power signal handling with a premium aluminum chassis that complements both modern and traditional Hi-Fi systems.\u003c\/p\u003e  \u003cp\u003eAt the heart of the LC30 is its versatile amplifier and speaker switching system. Two sets of stereo amplifier inputs and two sets of passive speaker outputs allow you to create four possible listening configurations, making it easy to compare different amplifiers with the same speakers or evaluate multiple speaker pairs with a single amplifier. Select between Amplifier A and Amplifier B or Speaker 1 and Speaker 2 using dedicated front-panel buttons or the included remote control. The LC30 operates with one amplifier and one speaker pair at a time, providing convenient A\/B comparisons while keeping your system organized and eliminating the need for repeated cable changes.\u003c\/p\u003e  \u003cp\u003eBeyond its switching capabilities, the Fosi Audio LC30 brings a distinctive visual element to your listening space with two large 85 × 45mm analog VU meters. These classic needle-style meters display the signal activity of the left and right audio channels, capturing the dynamics of your favorite music in real time. An adjustable pointer sensitivity knob allows you to fine-tune needle movement to match your system's playback levels, while five backlight settings—100%, 75%, 50%, 25%, and off—let you customize the appearance for different lighting conditions. Whether you're enjoying a quiet evening listening session or showing off your Hi-Fi setup, the LC30 adds a vintage-inspired aesthetic without sacrificing modern convenience.\u003c\/p\u003e  \u003cp\u003eEngineered to preserve the quality of your audio signal, the LC30 uses premium relay-based switching components, thickened copper circuit traces, and high-quality gold-plated speaker terminals to minimize unwanted signal loss. Built-in 390-ohm protective load resistors help reduce the risk of amplifier no-load conditions when switching between connected components. Its broad compatibility accommodates many amplifier designs, including Class A, Class B, Class AB, Class D, BTL, OCL, and compatible tube amplifiers. The precision-engineered internal circuitry is designed for stable, reliable performance while preserving the character of your connected audio equipment.\u003c\/p\u003e  \u003cp\u003eThe LC30's substantial CNC-machined aluminum alloy enclosure provides a durable foundation for desktop listening systems, dedicated Hi-Fi racks, and equipment comparison setups. Its sandblasted and anodized finish delivers a refined appearance that pairs beautifully with traditional stereo equipment and compact modern amplifiers. USB-C power keeps operation straightforward, while the included remote allows convenient control over amplifier selection, speaker switching, and VU meter lighting from your listening position. Whether you're comparing speakers, building a system with multiple amplifiers, or simply looking to add classic analog meters to your setup, the Fosi Audio LC30 is a versatile addition to any serious listening environment.\u003c\/p\u003e  \u003ch4\u003eSpecifications\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Fosi Audio\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e LC30\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSelected Model Variant:\u003c\/strong\u003e LC30-B\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Amplifier selector, passive speaker switcher, and stereo VU meter\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e Switches between two connected stereo amplifiers and two pairs of passive speakers\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmplifier Inputs:\u003c\/strong\u003e 2 stereo speaker-level input sets (Amplifier A and Amplifier B)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSpeaker Outputs:\u003c\/strong\u003e 2 stereo passive speaker output sets (Speaker 1 and Speaker 2)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMaximum Connected Amplifiers:\u003c\/strong\u003e 2\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMaximum Connected Speaker Pairs:\u003c\/strong\u003e 2\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAvailable Switching Configurations:\u003c\/strong\u003e Amplifier A to Speaker 1, Amplifier A to Speaker 2, Amplifier B to Speaker 1, or Amplifier B to Speaker 2\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSimultaneous Operation:\u003c\/strong\u003e One amplifier and one speaker pair at a time\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSpeaker A\/B Switching:\u003c\/strong\u003e Yes\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmplifier A\/B Switching:\u003c\/strong\u003e Yes\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMaximum Supported Power:\u003c\/strong\u003e 250 watts per channel at 4 ohms\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBuilt-In Amplifier:\u003c\/strong\u003e No; the LC30 routes speaker-level signals from external amplifiers\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSupported Amplifier Types:\u003c\/strong\u003e BTL, OCL, Class A, Class B, Class AB, Class D, and compatible tube amplifiers\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAudio Connection Type:\u003c\/strong\u003e Speaker-level connections through binding-post terminals\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmplifier Input Connections:\u003c\/strong\u003e Left and right positive\/negative speaker terminals for Amplifier A and Amplifier B\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSpeaker Output Connections:\u003c\/strong\u003e Left and right positive\/negative speaker terminals for Speaker 1 and Speaker 2\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSpeaker Terminals:\u003c\/strong\u003e Premium gold-plated binding posts\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTerminal Design:\u003c\/strong\u003e Upward- and downward-oriented terminals for convenient speaker cable connections\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSwitching Mechanism:\u003c\/strong\u003e High-quality relay-based switching\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRelay Components:\u003c\/strong\u003e HKE relays\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eInternal Circuitry:\u003c\/strong\u003e Thickened copper foil circuit traces designed to minimize signal loss\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmplifier No-Load Protection:\u003c\/strong\u003e Built-in 390-ohm protective load resistors\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVU Meters:\u003c\/strong\u003e 2 large analog needle-style meters\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVU Meter Channels:\u003c\/strong\u003e Independent left and right channel signal indication\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVU Meter Dimensions:\u003c\/strong\u003e 85 × 45mm each (approximately 3.35 × 1.77 inches)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVU Meter Sensitivity:\u003c\/strong\u003e Adjustable using the central pointer sensitivity knob\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVU Meter Backlighting:\u003c\/strong\u003e Adjustable illumination\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBrightness Settings:\u003c\/strong\u003e 5 levels: 100%, 75%, 50%, 25%, and off\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFront-Panel Controls:\u003c\/strong\u003e Amplifier selection, speaker selection, power, VU meter brightness, and pointer sensitivity\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFront-Panel Indicators:\u003c\/strong\u003e Amplifier A, Amplifier B, Speaker 1, and Speaker 2 selection LEDs\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRemote Control:\u003c\/strong\u003e Included infrared remote control\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRemote Functions:\u003c\/strong\u003e Power, Speaker 1\/2 selection, Amplifier A\/B selection, amplifier switching, speaker switching, VU meter backlight on\/off, and brightness adjustment\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRemote Batteries:\u003c\/strong\u003e 2 AAA batteries required, not included\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePower Requirement:\u003c\/strong\u003e DC 5V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePower Connection:\u003c\/strong\u003e USB-C\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUSB-C Function:\u003c\/strong\u003e Power input only; does not support USB audio or data transfer\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eChassis Material:\u003c\/strong\u003e Aluminum alloy\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eChassis Construction:\u003c\/strong\u003e One-piece CNC-machined enclosure\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eExterior Finish:\u003c\/strong\u003e Sandblasted and anodized aluminum\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 236.6 × 143.5 × 77.4mm (approximately 9.31 × 5.65 × 3.05 inches)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1,560g (approximately 3.44 lbs)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAnalog RCA Inputs:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBalanced XLR Inputs:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Connectivity:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eWi-Fi Connectivity:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDigital Audio Inputs:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBuilt-In DAC:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHeadphone Output:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVolume Control:\u003c\/strong\u003e No; central knob adjusts VU meter pointer sensitivity rather than audio volume\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer Warranty:\u003c\/strong\u003e 24-month limited warranty\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIncluded Accessories:\u003c\/strong\u003e Fosi Audio LC30 amplifier\/speaker selector, infrared remote control, USB-C power cable, and user manual\u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003eWhat It's Great At\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eConvenient Amplifier and Speaker Switching:\u003c\/strong\u003e Connect up to two stereo amplifiers and two pairs of passive speakers, then switch between four possible combinations without repeatedly disconnecting and reconnecting speaker cables.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eEasy A\/B Audio Comparisons:\u003c\/strong\u003e Dedicated front-panel controls and an included remote make it easy to compare amplifiers or speaker pairs while maintaining a consistent listening setup.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eClassic Analog VU Meter Display:\u003c\/strong\u003e Dual 85 × 45mm analog VU meters provide real-time visual feedback for the left and right audio channels, adding vintage-inspired style to a modern Hi-Fi system.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eHigh-Power Signal Handling:\u003c\/strong\u003e Supports amplifier output up to 250 watts per channel into 4 ohms, with relay-based switching, thickened copper circuitry, and premium binding posts designed to preserve audio signal quality.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eAdjustable Visual Experience:\u003c\/strong\u003e Five backlight brightness levels and adjustable VU meter sensitivity allow you to customize the appearance and needle movement to suit your listening environment.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003ePremium Construction and Broad Compatibility:\u003c\/strong\u003e A CNC-machined aluminum enclosure, protective load resistors, and compatibility with many amplifier designs make the LC30 a versatile addition to desktop, home theater, and dedicated two-channel Hi-Fi systems.\u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003eFAQ Section\u003c\/h4\u003e  \u003cp\u003e\u003cstrong\u003eQ: What does the Fosi Audio LC30 do?\u003c\/strong\u003e\u003cbr\u003e A: The Fosi Audio LC30 is an amplifier and speaker selector that allows you to connect up to two stereo amplifiers and two pairs of passive speakers. It lets you switch between different amplifier and speaker combinations without physically swapping speaker cables. Dual analog VU meters display audio signal activity for an added visual element.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can I connect two amplifiers and two pairs of speakers to the Fosi Audio LC30?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The LC30 features two stereo amplifier input sets and two stereo speaker output sets, providing four possible listening configurations. You can select Amplifier A or Amplifier B and route the selected amplifier to Speaker 1 or Speaker 2 using the front-panel controls or included remote.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can the Fosi Audio LC30 play both speaker pairs simultaneously?\u003c\/strong\u003e\u003cbr\u003e A: No. The LC30 operates with only one amplifier and one pair of speakers at a time. It is designed for switching between speaker pairs or amplifiers rather than playing multiple speaker pairs simultaneously.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: How much amplifier power can the Fosi Audio LC30 handle?\u003c\/strong\u003e\u003cbr\u003e A: The LC30 supports up to 250 watts per channel into 4 ohms. It is designed to handle speaker-level signals from compatible external amplifiers without adding its own amplification. The LC30 does not contain a power amplifier and cannot drive passive speakers on its own.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio LC30 have a remote control?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The LC30 includes an infrared remote that allows you to select between amplifiers and speaker pairs, control power, and adjust VU meter illumination. The remote requires two AAA batteries, which are not included.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can I adjust the VU meters on the Fosi Audio LC30?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The LC30 features a central sensitivity adjustment knob that controls the movement of the analog VU meter needles to accommodate different signal levels. The backlighting also offers five settings: 100%, 75%, 50%, 25%, and off. The sensitivity knob does not adjust your system's audio volume.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Is the Fosi Audio LC30 compatible with Class-D and tube amplifiers?\u003c\/strong\u003e\u003cbr\u003e A: The LC30 is designed to accommodate a broad range of amplifier types, including Class A, Class B, Class AB, Class D, BTL, OCL, and compatible tube amplifiers. It incorporates 390-ohm protective load resistors to reduce amplifier no-load conditions. Because some tube amplifiers require a specific speaker load at all times, always confirm switching and load compatibility with the amplifier manufacturer before connecting one.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio LC30 support Bluetooth, RCA audio, or digital inputs?\u003c\/strong\u003e\u003cbr\u003e A: No. The LC30 is a speaker-level amplifier and speaker switcher rather than a music streamer, DAC, or integrated amplifier. Its audio connections consist of speaker-level binding posts for two amplifiers and two passive speaker pairs. The USB-C connection supplies power to the switching electronics and VU meter functions and does not accept digital audio.\u003c\/p\u003e","brand":"Fosi Audio","offers":[{"title":"Default Title","offer_id":62887253934239,"sku":"FOS-LC30B-BLK","price":159.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0495\/6910\/4031\/files\/20c8be56-a41d-4fbe-a65c-744fd828c113.jpg?v=1791562553"},{"product_id":"fosi-audio-zh3-desktop-dac-headphone-amplifier-preamplifier","title":"Fosi Audio ZH3 Desktop DAC, Headphone Amplifier \u0026 Preamplifier","description":"\u003ch3\u003eFosi Audio ZH3 Desktop DAC, Headphone Amplifier \u0026amp; Preamplifier\u003c\/h3\u003e  \u003cp\u003eElevate your desktop listening experience with the Fosi Audio ZH3 Desktop DAC, Headphone Amplifier \u0026amp; Preamplifier, a versatile all-in-one Hi-Fi solution designed for audiophiles, music enthusiasts, and gamers who demand exceptional sound quality. Combining an AKM AK4493SEQ DAC, XMOS XU316 USB processor, and four Texas Instruments OPA1612 operational amplifiers, the ZH3 delivers detailed, low-distortion audio with support for high-resolution PCM playback up to 32-bit\/768kHz and native DSD512. Featuring a fully balanced amplification architecture, powerful headphone outputs, and comprehensive digital and analog connectivity, the ZH3 serves as the centerpiece of a premium desktop or home audio system.\u003c\/p\u003e  \u003cp\u003eEngineered to deliver clean, dynamic sound across a wide range of headphones, the ZH3 incorporates a proprietary dual-power balanced amplifier circuit with ultra-low-noise LDO regulators and carefully selected capacitors. Its 4.4mm balanced headphone output delivers up to 2,570mW per channel into 32 ohms, while the 6.35mm single-ended connection provides up to 640mW per channel. Three selectable gain levels accommodate headphones with impedances ranging from 16 to 300 ohms, making the ZH3 equally capable of driving sensitive in-ear monitors and more demanding over-ear headphones. With a signal-to-noise ratio reaching 121dB and an exceptionally low noise floor of just 1.9µV through the single-ended output, the ZH3 preserves subtle musical details while minimizing unwanted background noise.\u003c\/p\u003e  \u003cp\u003eBeyond headphone listening, the Fosi Audio ZH3 functions as a versatile digital-to-analog converter and stereo preamplifier. USB-C, optical, coaxial, and stereo RCA inputs allow you to connect computers, CD players, streamers, gaming consoles, and other compatible audio sources. Balanced XLR and unbalanced RCA outputs provide connections for powered speakers, integrated amplifiers, and dedicated power amplifiers. Select adjustable preamplifier output for convenient volume control or fixed-level line output when connecting to another component with its own volume adjustment. Dedicated 12V trigger input and output connections allow the ZH3 to synchronize power with compatible equipment, making it an excellent companion for components such as the Fosi Audio ZA3 power amplifier and MERAK CD player.\u003c\/p\u003e  \u003cp\u003eFor listeners who enjoy customizing their sound, the ZH3 includes independent bass and treble adjustments, six selectable digital filters, and a Bypass function that removes the tone control circuit from the signal path. Two replaceable DIP8 operational amplifier sockets also provide an opportunity for enthusiasts to experiment with compatible aftermarket op-amps. USB Audio Class 1.0 and 2.0 support ensures flexibility between high-resolution computer playback and compatible gaming consoles such as the PlayStation 5 and Nintendo Switch. An intuitive front-panel display, multifunction volume knob, and included infrared remote make it easy to select inputs, change output modes, adjust volume, and manage settings without complicated software.\u003c\/p\u003e  \u003cp\u003eHoused in a refined desktop enclosure that complements Fosi Audio's Z-Series components, the ZH3 combines modern aesthetics with practical everyday functionality. Its compact footprint makes it ideal for headphone listening stations, desktop audio systems, and dedicated Hi-Fi setups, while its extensive input and output options provide the flexibility to expand your system over time. Whether you're enjoying high-resolution music, powering audiophile headphones, or building a system around balanced power amplification, the Fosi Audio ZH3 delivers exceptional versatility and high-fidelity performance in one convenient component.\u003c\/p\u003e  \u003ch4\u003eSpecifications\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Fosi Audio\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e ZH3\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Desktop digital-to-analog converter, headphone amplifier, and stereo preamplifier\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAudio Channels:\u003c\/strong\u003e 2-channel stereo\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDAC Chip:\u003c\/strong\u003e AKM AK4493SEQ\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUSB Audio Processor:\u003c\/strong\u003e XMOS XU316\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOperational Amplifiers:\u003c\/strong\u003e Texas Instruments OPA1612 ×4\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmplifier Architecture:\u003c\/strong\u003e Fully balanced, dual-power amplifier circuitry with push-pull differential amplification\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePower Regulation:\u003c\/strong\u003e Multiple ultra-low-noise LDO regulators and capacitors\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMaximum USB PCM Resolution:\u003c\/strong\u003e 32-bit\/768kHz\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMaximum USB DSD Resolution:\u003c\/strong\u003e DSD512\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOptical Audio Resolution:\u003c\/strong\u003e Up to 24-bit\/192kHz PCM\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCoaxial Audio Resolution:\u003c\/strong\u003e Up to 24-bit\/192kHz PCM\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAudio Inputs:\u003c\/strong\u003e 4 input types: USB-C, optical, coaxial, and stereo RCA\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUSB Audio Input:\u003c\/strong\u003e 1 × USB-C\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOptical Digital Input:\u003c\/strong\u003e 1 × TOSLINK\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCoaxial Digital Input:\u003c\/strong\u003e 1 × coaxial S\/PDIF\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAnalog Audio Input:\u003c\/strong\u003e 1 × stereo RCA pair\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAudio Outputs:\u003c\/strong\u003e 4 output types: 4.4mm balanced, 6.35mm single-ended, stereo RCA, and balanced XLR\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBalanced Headphone Output:\u003c\/strong\u003e 1 × 4.4mm\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSingle-Ended Headphone Output:\u003c\/strong\u003e 1 × 6.35mm (1\/4-inch)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAnalog Line Outputs:\u003c\/strong\u003e 1 × stereo RCA pair\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBalanced Line Outputs:\u003c\/strong\u003e 1 × stereo XLR pair\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e12V Trigger Input:\u003c\/strong\u003e 1 × 3.5mm\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e12V Trigger Output:\u003c\/strong\u003e 1 × 3.5mm\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSupported Headphone Impedance:\u003c\/strong\u003e 16–300 ohms\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHeadphone Gain Settings:\u003c\/strong\u003e Low, Medium, and High\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e4.4mm Balanced Output Power, Low Gain:\u003c\/strong\u003e 145mW ×2 at 32 ohms\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e4.4mm Balanced Output Power, Medium Gain:\u003c\/strong\u003e 580mW ×2 at 32 ohms\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e4.4mm Balanced Output Power, High Gain:\u003c\/strong\u003e 2,570mW ×2 at 32 ohms\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e4.4mm Balanced Output Signal-to-Noise Ratio:\u003c\/strong\u003e At least 119dB (A-weighted)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e4.4mm Balanced Output THD+N:\u003c\/strong\u003e 0.00018% or less (A-weighted)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e4.4mm Balanced Output Dynamic Range:\u003c\/strong\u003e At least 119dB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e4.4mm Balanced Output Noise Floor:\u003c\/strong\u003e 4.9µV or less (A-weighted)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e4.4mm Balanced Output Frequency Response:\u003c\/strong\u003e 20Hz–20kHz (±0.1dB)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e6.35mm Output Power, Low Gain:\u003c\/strong\u003e 36mW ×2 at 32 ohms\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e6.35mm Output Power, Medium Gain:\u003c\/strong\u003e 145mW ×2 at 32 ohms\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e6.35mm Output Power, High Gain:\u003c\/strong\u003e 640mW ×2 at 32 ohms\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e6.35mm Output Signal-to-Noise Ratio:\u003c\/strong\u003e At least 121dB (A-weighted)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e6.35mm Output THD+N:\u003c\/strong\u003e 0.00024% or less (A-weighted)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e6.35mm Output Dynamic Range:\u003c\/strong\u003e At least 121dB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e6.35mm Output Noise Floor:\u003c\/strong\u003e 1.9µV or less (A-weighted)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e6.35mm Output Frequency Response:\u003c\/strong\u003e 20Hz–20kHz (±0.1dB)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRCA Line Output Level:\u003c\/strong\u003e 2Vrms in fixed line-output mode\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRCA Output Signal-to-Noise Ratio:\u003c\/strong\u003e At least 122dB (A-weighted)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRCA Output THD+N:\u003c\/strong\u003e 0.00018% or less (A-weighted)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRCA Output Dynamic Range:\u003c\/strong\u003e At least 122dB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRCA Output Noise Floor:\u003c\/strong\u003e 1.7µV or less (A-weighted)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRCA Output Frequency Response:\u003c\/strong\u003e 20Hz–20kHz (±0.1dB)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eXLR Line Output Level:\u003c\/strong\u003e 4Vrms in fixed line-output mode\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eXLR Output Signal-to-Noise Ratio:\u003c\/strong\u003e At least 119dB (A-weighted)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eXLR Output THD+N:\u003c\/strong\u003e 0.00025% or less (A-weighted)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eXLR Output Dynamic Range:\u003c\/strong\u003e At least 120dB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eXLR Output Noise Floor:\u003c\/strong\u003e 4.6µV or less (A-weighted)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eXLR Output Frequency Response:\u003c\/strong\u003e 20Hz–20kHz (±0.1dB)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAnalog RCA Input Support:\u003c\/strong\u003e Accepts compatible line-level stereo sources\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRCA Input to 4.4mm Output Power:\u003c\/strong\u003e Up to 2,100mW ×2 at 32 ohms\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRCA Input to 6.35mm Output Power:\u003c\/strong\u003e Up to 520mW ×2 at 32 ohms\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOutput Modes:\u003c\/strong\u003e PO headphone output, AUX adjustable preamplifier output, and LO fixed line-level output\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFixed Line Output Voltage:\u003c\/strong\u003e RCA 2V \/ XLR 4V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVolume Adjustment:\u003c\/strong\u003e Multifunction rotary volume control with on-screen level indication\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVolume Range:\u003c\/strong\u003e 0–99 for digital inputs; 0–32 with RCA input\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTone Controls:\u003c\/strong\u003e Adjustable bass and treble for supported headphone-output modes\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eEQ Bypass:\u003c\/strong\u003e Disables bass and treble circuitry for direct audio playback\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDigital Filters:\u003c\/strong\u003e 6 selectable DAC filters\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFilter 1:\u003c\/strong\u003e Sharp Roll-off – Powerful, Dynamic\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFilter 2:\u003c\/strong\u003e Slow Roll-off – Neutral, Balanced\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFilter 3:\u003c\/strong\u003e Short Delay Sharp Roll-off – Detailed, Extended Highs\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFilter 4:\u003c\/strong\u003e Short Delay Slow Roll-off – Clear, Well-Defined\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFilter 5:\u003c\/strong\u003e Super Slow Roll-off – Natural, Smooth\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFilter 6:\u003c\/strong\u003e Low Dispersion – Precise, Analytical\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eReplaceable Op-Amps:\u003c\/strong\u003e 2 user-replaceable DIP8 dual-channel op-amp positions\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCompatible Op-Amp Examples:\u003c\/strong\u003e LME49720, NE5532, MUSES02, SS3602, and other electrically compatible dual-channel models\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUSB Audio Modes:\u003c\/strong\u003e USB Audio Class 1.0 and 2.0\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eGaming Compatibility:\u003c\/strong\u003e PlayStation 5 and other supported gaming consoles using UAC 1.0\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eComputer Compatibility:\u003c\/strong\u003e Windows 8, 8.1, 10, 11; macOS X 10.6 or later; Linux\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUSB Driver Requirements:\u003c\/strong\u003e Standard playback is plug-and-play on supported modern systems; additional drivers may be required for certain DSD and 768kHz playback configurations\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFirmware Updates:\u003c\/strong\u003e XMOS firmware updates supported through USB-C\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDisplay:\u003c\/strong\u003e Integrated front-panel digital display\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDisplay Information:\u003c\/strong\u003e Volume, input source, output mode, sampling rate, EQ status, and system settings\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDisplay Brightness:\u003c\/strong\u003e Four adjustable brightness levels with automatic screen-off mode\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRemote Control:\u003c\/strong\u003e Included infrared remote\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRemote Functions:\u003c\/strong\u003e Power, mute, volume, input selection, output selection, filter selection, display brightness, and menu navigation\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRemote Batteries:\u003c\/strong\u003e 2 AAA batteries required, not included\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAutomatic Standby:\u003c\/strong\u003e Optional automatic power-off after 30 minutes without an audio signal\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e12V Trigger Function:\u003c\/strong\u003e Trigger input and output allow synchronized power operation with compatible upstream and downstream components\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePower Requirement:\u003c\/strong\u003e DC 12V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBuilt-In Speaker Amplification:\u003c\/strong\u003e No; requires external amplification for passive speakers\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Connectivity:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eWi-Fi Connectivity:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHDMI Connectivity:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBuilt-In Phono Preamplifier:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer Warranty:\u003c\/strong\u003e 24-month limited warranty\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIncluded Accessories:\u003c\/strong\u003e Fosi Audio ZH3, 6.35mm headphone adapter, 12V trigger cable, infrared remote, USB-A\/C to USB-C cable, DC 12V power adapter, and user manual\u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003eWhat It's Great At\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eExceptional High-Resolution Audio Playback:\u003c\/strong\u003e The AKM AK4493SEQ DAC and XMOS XU316 processor support PCM up to 32-bit\/768kHz and DSD512 through USB for detailed, high-fidelity music listening.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003ePowerful Balanced Headphone Amplification:\u003c\/strong\u003e Delivering up to 2,570mW per channel at 32 ohms through its 4.4mm balanced output, the ZH3 provides substantial power for a wide range of audiophile headphones.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eFlexible DAC and Preamplifier Integration:\u003c\/strong\u003e USB-C, optical, coaxial, and RCA inputs combine with balanced XLR and RCA outputs to accommodate computers, music sources, powered speakers, and external amplifiers.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eCustomizable Listening Experience:\u003c\/strong\u003e Three headphone gain settings, independent bass and treble adjustment, six digital filters, and EQ Bypass allow you to tailor playback for different headphones, recordings, and listening preferences.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eConvenient Hi-Fi System Control:\u003c\/strong\u003e Dedicated 12V trigger input and output connections, selectable fixed or variable line outputs, and an included infrared remote make the ZH3 easy to integrate with compatible audio components.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eVersatile Desktop and Gaming Compatibility:\u003c\/strong\u003e USB Audio Class 1.0 and 2.0 support allows the ZH3 to serve as both a high-resolution desktop DAC and a compatible gaming-console audio solution.\u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003eFAQ Section\u003c\/h4\u003e  \u003cp\u003e\u003cstrong\u003eQ: What is the Fosi Audio ZH3 used for?\u003c\/strong\u003e\u003cbr\u003e A: The Fosi Audio ZH3 is an all-in-one desktop DAC, headphone amplifier, and stereo preamplifier designed for high-resolution music listening, gaming, and home Hi-Fi systems. It converts digital audio into analog sound, powers compatible wired headphones, and connects to powered speakers or external power amplifiers through RCA and XLR outputs.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: How much headphone power does the Fosi Audio ZH3 deliver?\u003c\/strong\u003e\u003cbr\u003e A: The ZH3 delivers up to 2,570mW per channel into 32 ohms through its 4.4mm balanced headphone output and up to 640mW per channel into 32 ohms through its 6.35mm single-ended output when using USB input and high gain. Three selectable gain levels accommodate headphones with different power requirements, including models rated from 16 to 300 ohms.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: What audio inputs and outputs does the Fosi Audio ZH3 have?\u003c\/strong\u003e\u003cbr\u003e A: The ZH3 features four audio input types: USB-C, optical, coaxial, and stereo RCA. It also provides four audio output types: 4.4mm balanced headphones, 6.35mm single-ended headphones, stereo RCA, and balanced stereo XLR. Separate 12V trigger input and output connections support synchronized power control.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio ZH3 have a 12V trigger?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The ZH3 includes both a 12V trigger input and a 12V trigger output. The trigger input allows an upstream component, such as a compatible CD player, to control the ZH3's power, while the trigger output can automatically power compatible downstream equipment such as the Fosi Audio ZA3 amplifier on or off.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can I connect the Fosi Audio ZH3 to powered speakers or a power amplifier?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The ZH3 features stereo RCA and balanced XLR outputs that can connect to compatible powered speakers, integrated amplifiers, or dedicated power amplifiers. Its AUX mode provides adjustable preamplifier output, while LO mode supplies fixed-level 2Vrms RCA and 4Vrms XLR signals for components with their own volume controls.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can I adjust the bass, treble, and sound signature on the Fosi Audio ZH3?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The ZH3 features adjustable bass and treble, six selectable digital filters, and an EQ Bypass function. These customization features are available in supported headphone playback modes, while some adjustments are disabled when using fixed or variable line-level outputs.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio ZH3 work with PlayStation 5 and gaming consoles?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The ZH3 supports USB Audio Class 1.0 for compatibility with gaming systems such as the PlayStation 5 and USB Audio Class 2.0 for high-resolution playback from supported computers and audio devices. Select UAC 1.0 when using a console that requires the older USB audio standard.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can I connect a turntable to the Fosi Audio ZH3?\u003c\/strong\u003e\u003cbr\u003e A: Yes, provided the turntable has a built-in phono preamplifier or is connected through a separate external phono preamp. The ZH3 includes a stereo RCA analog input for line-level sources but does not contain a dedicated phono stage. The turntable's signal must therefore be converted to line level before connecting to the ZH3.\u003c\/p\u003e","brand":"Fosi Audio","offers":[{"title":"Default Title","offer_id":62887254753439,"sku":"FOS-ZH3-BLK","price":199.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0495\/6910\/4031\/files\/491a0a7b-a7b6-408c-9dc7-34d89b97077d.jpg?v=1791563406"},{"product_id":"fosi-audio-psu20-3-channel-40w-linear-power-supply","title":"Fosi Audio PSU20 3-Channel 40W Linear Power Supply","description":"\u003ch3\u003eFosi Audio PSU20 3-Channel 40W Linear Power Supply\u003c\/h3\u003e  \u003cp\u003eUpgrade your Hi-Fi system with the Fosi Audio PSU20 3-Channel 40W Linear Power Supply, a premium power solution designed to deliver clean, stable, and reliable electricity to your favorite audio components. Featuring a custom 80W pure-copper toroidal transformer, three fully isolated power output channels, and ultra-low ripple noise as low as 0.1mV, the PSU20 provides a refined alternative to conventional switching power adapters. With two selectable DC outputs and one USB-A power output, the PSU20 can power up to three compatible devices simultaneously, making it an excellent addition to systems built around DACs, headphone amplifiers, CD transports, and stereo preamplifiers.\u003c\/p\u003e  \u003cp\u003eDesigned to minimize electrical interference and preserve audio system performance, the PSU20 uses a carefully engineered linear power architecture with independent rectification, filtering, voltage regulation, and protection circuits for each output channel. Unlike conventional switching power supplies, which rely on high-frequency switching circuits, the PSU20 uses linear regulation to provide a stable DC output with a controlled noise profile. Premium Nippon Chemi-Con capacitors help reduce unwanted voltage fluctuations and electrical ripple, while a high-performance rectifier and dedicated voltage regulators support clean, consistent power delivery. This approach can help reduce power-related interference in compatible audio equipment, particularly sensitive low-noise components.\u003c\/p\u003e  \u003cp\u003eFlexibility is one of the PSU20's greatest advantages. Its first DC output provides selectable 12V or 15V power with a maximum rated output of 20 watts, while the second DC output offers selectable 5V or 12V power with a maximum rating of 15 watts. A dedicated USB-A connection supplies 5V\/1A power for compatible USB-powered devices. Together, these three independently isolated outputs deliver a combined rated capacity of 40 watts, allowing listeners to replace multiple individual power adapters with one centralized power solution. The included DC-to-DC power cables help reduce cable clutter while creating a cleaner, more organized audio system.\u003c\/p\u003e  \u003cp\u003eInside the PSU20 is a custom pure-copper toroidal transformer rated at 80 watts with a peak capability of up to 100 watts, providing the foundation for stable power conversion and regulation. Its GBU806 rectifier bridge is rated for 600V and 8A, while three LM1085IT regulators and one ST78M05 regulator provide carefully controlled voltage delivery. Each output channel operates through dedicated regulation and protection circuitry to help prevent electrical interaction between connected components. With ripple levels as low as 0.1mV, the PSU20 is engineered to support sensitive audio electronics that benefit from consistent, low-noise power.\u003c\/p\u003e  \u003cp\u003eFor reliable long-term operation, the PSU20 incorporates automatic thermal management and multiple electrical protection systems. A custom low-noise cooling fan activates when the internal temperature reaches approximately 55°C (131°F), operating at a rated noise level of just 30dB. Built-in over-temperature, overvoltage, and overcurrent protection help safeguard the power supply and compatible connected equipment. Its durable desktop enclosure and unified component styling allow it to integrate naturally into modern Hi-Fi systems. Whether you're powering a dedicated headphone listening station, a desktop DAC and preamplifier combination, or multiple compatible low-voltage audio components, the Fosi Audio PSU20 delivers a convenient, organized, and performance-focused power solution.\u003c\/p\u003e  \u003ch4\u003eSpecifications\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Fosi Audio\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e PSU20\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e 3-channel linear DC power supply\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePower Supply Design:\u003c\/strong\u003e Linear regulated power supply\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePower Output Channels:\u003c\/strong\u003e 3 fully isolated channels\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMaximum Connected Devices:\u003c\/strong\u003e 3 compatible devices simultaneously\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTotal Rated Output Power:\u003c\/strong\u003e 40 watts\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTransformer:\u003c\/strong\u003e Custom pure-copper toroidal transformer\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTransformer Rating:\u003c\/strong\u003e 80 watts\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTransformer Peak Power:\u003c\/strong\u003e Up to 100 watts\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAC Power Input:\u003c\/strong\u003e 1 × AC mains power connection\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAC Voltage Selection:\u003c\/strong\u003e Manual 115V\/230V selection\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e115V Setting:\u003c\/strong\u003e Supports 100–120V AC, 60Hz\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e230V Setting:\u003c\/strong\u003e Supports 220–240V AC, 50Hz\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDC Power Outputs:\u003c\/strong\u003e 2 DC barrel-style power connections\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUSB Power Output:\u003c\/strong\u003e 1 USB-A connection\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDC Output 1 Voltage:\u003c\/strong\u003e Selectable 12V or 15V DC\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDC Output 1 Rated Power:\u003c\/strong\u003e 20 watts\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDC Output 2 Voltage:\u003c\/strong\u003e Selectable 5V or 12V DC\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDC Output 2 Rated Power:\u003c\/strong\u003e 15 watts\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUSB-A Output Voltage:\u003c\/strong\u003e 5V DC\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUSB-A Output Current:\u003c\/strong\u003e 1A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUSB-A Output Rated Power:\u003c\/strong\u003e 5 watts\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSupported Output Voltages:\u003c\/strong\u003e 5V, 12V, and 15V DC\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOutput Isolation:\u003c\/strong\u003e Independent rectification, filtering, regulation, and protection for each channel\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage Regulation:\u003c\/strong\u003e Four linear regulator components\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eLinear Regulators:\u003c\/strong\u003e 3 × LM1085IT and 1 × ST78M05\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRectifier Bridge:\u003c\/strong\u003e GBU806\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRectifier Voltage Rating:\u003c\/strong\u003e 600V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRectifier Current Rating:\u003c\/strong\u003e 8A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCapacitors:\u003c\/strong\u003e Premium Nippon Chemi-Con capacitors\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOutput Ripple:\u003c\/strong\u003e As low as 0.1mV\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCooling System:\u003c\/strong\u003e Automatic temperature-controlled cooling fan\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCooling Fan Activation Temperature:\u003c\/strong\u003e 55°C (131°F)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCooling Fan Noise Level:\u003c\/strong\u003e Approximately 30dB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOver-Temperature Protection:\u003c\/strong\u003e Yes\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOvervoltage Protection:\u003c\/strong\u003e Yes\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOvercurrent Protection:\u003c\/strong\u003e Yes\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOperating Temperature Range:\u003c\/strong\u003e -20°C to 40°C (-4°F to 104°F)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFull-Load Temperature Rise:\u003c\/strong\u003e Approximately 25°C (77°F)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCompatible Equipment:\u003c\/strong\u003e Devices requiring supported DC voltages, power levels, polarity, and connectors\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRecommended Applications:\u003c\/strong\u003e Compatible DACs, CD transports, headphone amplifiers, preamplifiers, and low-voltage audio accessories\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePower Distribution:\u003c\/strong\u003e Three independent output channels with a combined 40W rating\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePower Cable Length 1:\u003c\/strong\u003e 1.2 meters (47.2 inches)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePower Cable Length 2:\u003c\/strong\u003e 0.3 meters (11.8 inches)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Black\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCertifications:\u003c\/strong\u003e CE, FCC, and RoHS\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eEAN:\u003c\/strong\u003e 6976136961482\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAnalog Audio Inputs:\u003c\/strong\u003e None\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDigital Audio Inputs:\u003c\/strong\u003e None\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAudio Outputs:\u003c\/strong\u003e None; all three outputs provide electrical power only\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e12V Trigger:\u003c\/strong\u003e No dedicated 12V trigger connection\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBuilt-In Audio Amplifier:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Connectivity:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eWi-Fi Connectivity:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer Warranty:\u003c\/strong\u003e 24-month limited warranty\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIncluded Accessories:\u003c\/strong\u003e Fosi Audio PSU20 Linear Power Supply, 1.2m DC-to-DC power cable, 0.3m DC-to-DC power cable, AC power cord, and user manual\u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003eWhat It's Great At\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eClean, Low-Noise Power Delivery:\u003c\/strong\u003e Linear regulation, premium capacitors, and ripple noise as low as 0.1mV help reduce unwanted power-supply interference in compatible Hi-Fi equipment.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003ePowering Three Components Simultaneously:\u003c\/strong\u003e Two DC outputs and one USB-A connection provide a combined 40 watts of rated power for compatible DACs, headphone amplifiers, CD transports, preamplifiers, and audio accessories.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eFully Isolated Power Channels:\u003c\/strong\u003e Independent rectification, filtering, regulation, and protection circuitry for each output helps minimize electrical interaction between connected components.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eFlexible Voltage Selection:\u003c\/strong\u003e Selectable 5V, 12V, and 15V DC output options accommodate a wide range of supported low-voltage audio devices.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003ePremium Power Supply Components:\u003c\/strong\u003e An 80W pure-copper toroidal transformer, Nippon Chemi-Con capacitors, a GBU806 rectifier, and dedicated linear regulators provide a robust foundation for consistent power delivery.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eReliable, Quiet Operation:\u003c\/strong\u003e An automatic 30dB cooling fan and built-in over-temperature, overvoltage, and overcurrent protection support stable operation during extended listening sessions.\u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003eFAQ Section\u003c\/h4\u003e  \u003cp\u003e\u003cstrong\u003eQ: What is the Fosi Audio PSU20 used for?\u003c\/strong\u003e\u003cbr\u003e A: The Fosi Audio PSU20 is a 3-channel linear power supply designed to deliver clean, stable DC power to compatible audio components. It can replace multiple individual power adapters while supplying electricity to devices such as DACs, headphone amplifiers, CD transports, and stereo preamplifiers. It is not an audio amplifier or signal-processing device.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: How many devices can the Fosi Audio PSU20 power simultaneously?\u003c\/strong\u003e\u003cbr\u003e A: The PSU20 can power up to three compatible devices at the same time. It features two DC barrel outputs and one USB-A power output, providing a combined rated output of 40 watts. The connected devices must remain within the voltage and power limits of their respective outputs.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: What power outputs does the Fosi Audio PSU20 have?\u003c\/strong\u003e\u003cbr\u003e A: The PSU20 provides three isolated outputs. DC Output 1 offers selectable 12V or 15V power with a maximum rating of 20 watts, DC Output 2 offers selectable 5V or 12V power rated at 15 watts, and the USB-A output provides 5V\/1A power rated at 5 watts. All three outputs are dedicated to supplying electrical power rather than carrying audio signals.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: What is the benefit of a linear power supply for Hi-Fi audio?\u003c\/strong\u003e\u003cbr\u003e A: A linear power supply uses transformer-based power conversion and linear voltage regulation to provide stable DC power with a controlled noise profile. The PSU20 offers ripple levels as low as 0.1mV, which may help reduce power-related interference in sensitive audio equipment. The degree of audible improvement depends on the connected components and their internal power regulation.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can I use the Fosi Audio PSU20 with any DAC or headphone amplifier?\u003c\/strong\u003e\u003cbr\u003e A: The PSU20 works with compatible audio equipment that meets its voltage, current, power, connector, and polarity requirements. Before connecting a device, verify that it operates at the selected output voltage and that its power consumption does not exceed the rating of the chosen PSU20 output. Devices requiring higher power levels or different electrical specifications should not be connected.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio PSU20 have a cooling fan?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The PSU20 includes a temperature-controlled cooling fan that automatically activates when its internal temperature reaches approximately 55°C (131°F). The fan operates at a rated noise level of approximately 30dB and helps maintain stable performance during extended use.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio PSU20 include electrical protection features?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The PSU20 includes over-temperature, overvoltage, and overcurrent protection to help safeguard the power supply and connected audio equipment. Each of its three output channels incorporates dedicated regulation and protection circuitry for stable, isolated power delivery.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio PSU20 have audio inputs, outputs, or a 12V trigger?\u003c\/strong\u003e\u003cbr\u003e A: No. The PSU20 is a dedicated electrical power supply and does not include analog or digital audio connections or a dedicated 12V trigger. It features one AC mains input and three DC power outputs: two barrel-style DC outputs and one USB-A power output. Its 12V settings supply continuous DC power rather than trigger-control signals.\u003c\/p\u003e","brand":"Fosi Audio","offers":[{"title":"Default Title","offer_id":62887255408799,"sku":"FOS-PSU20-BLK","price":199.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0495\/6910\/4031\/files\/4dd47364-0ad1-4112-8e37-5012882bf5fa.jpg?v=1791563867"},{"product_id":"fosi-audio-zp3-balanced-stereo-preamplifier","title":"Fosi Audio ZP3 Balanced Stereo Preamplifier","description":"\u003ch3\u003eFosi Audio ZP3 Balanced Stereo Preamplifier\u003c\/h3\u003e  \u003cp\u003eTake control of your home audio system with the Fosi Audio ZP3 Balanced Stereo Preamplifier, a versatile Hi-Fi component designed to bring multiple audio sources, precise volume control, and flexible system connectivity together in one compact device. Featuring a balanced audio architecture, three selectable analog inputs, and dedicated RCA, XLR, and subwoofer outputs, the ZP3 serves as the control center for a high-performance stereo system. With premium audio components, adjustable bass and treble, a three-position high-pass filter, and convenient remote operation, the ZP3 makes it easy to customize your listening experience while preserving the clarity and dynamics of your favorite music.\u003c\/p\u003e  \u003cp\u003eDesigned for listeners who want greater control over their audio systems, the ZP3 features two stereo RCA inputs and one balanced stereo XLR input, allowing you to connect multiple source components such as external DACs, CD players, music streamers, and phono preamplifiers. Balanced XLR and unbalanced RCA outputs provide flexible connections to compatible power amplifiers and powered speakers, while a dedicated subwoofer output allows easy integration of a powered subwoofer for deeper, more impactful bass. The ZP3 also supports conversion between balanced and unbalanced analog signals, making it easier to combine components with different connection types without relying on additional converters.\u003c\/p\u003e  \u003cp\u003eAt the heart of the Fosi Audio ZP3 is an optimized preamplifier circuit incorporating premium ELNA capacitors, an NJR NJU72315 electronic volume control IC, and gold-plated RCA connections. These components help minimize distortion and unwanted noise while preserving musical detail and precise stereo imaging. The balanced XLR output achieves a signal-to-noise ratio of at least 112dB and total harmonic distortion plus noise of 0.0007% or less, while the RCA output delivers a signal-to-noise ratio of at least 115dB with distortion of 0.0008% or less. With a manufacturer-rated SINAD of at least 113dB and channel crosstalk of -130dB or lower, the ZP3 provides a clean, controlled foundation for high-fidelity music reproduction.\u003c\/p\u003e  \u003cp\u003eFor additional flexibility, the ZP3 features independent bass, treble, and left\/right balance adjustments, giving you control over the tonal character and stereo balance of your system. Bass can be adjusted by ±12dB, while treble can be adjusted by ±6dB, allowing you to fine-tune playback for different recordings, speakers, and listening preferences. A dedicated Bypass switch removes the bass and treble adjustment circuitry from the signal path when you prefer a more direct listening experience. The ZP3 also incorporates a three-position high-pass filter with full-range, 80Hz, and 120Hz settings, allowing you to reduce low-frequency output to your main speakers when using a powered subwoofer. This makes it particularly useful for compact bookshelf speaker systems and 2.1-channel Hi-Fi setups.\u003c\/p\u003e  \u003cp\u003eConvenience is another key part of the ZP3's design. Its precision electronic volume control remembers individual volume settings for each input, reducing the need for repeated adjustments when switching between sources with different output levels. Front-panel controls provide direct access to input selection, volume, bass, treble, and stereo balance, while the included infrared remote handles power, mute, volume, and source selection from your listening position. Dedicated 12V trigger input and output connections allow the ZP3 to synchronize power with compatible audio components, including the Fosi Audio ZD3 DAC and ZA3 power amplifier. With its compact desktop-friendly enclosure, premium components, and flexible analog connectivity, the Fosi Audio ZP3 is an excellent choice for building or expanding a dedicated stereo or 2.1-channel Hi-Fi system.\u003c\/p\u003e  \u003ch4\u003eSpecifications\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Fosi Audio\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e ZP3\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Balanced stereo preamplifier\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAudio Channels:\u003c\/strong\u003e 2.0-channel stereo with dedicated subwoofer line output\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSupported System Configuration:\u003c\/strong\u003e Stereo or 2.1-channel with a powered subwoofer\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePreamplifier Architecture:\u003c\/strong\u003e Balanced analog signal architecture\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTotal Audio Inputs:\u003c\/strong\u003e 3 selectable stereo inputs\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRCA Audio Inputs:\u003c\/strong\u003e 2 stereo RCA pairs (RCA 1 and RCA 2)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBalanced Audio Input:\u003c\/strong\u003e 1 stereo XLR pair\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTotal Audio Output Types:\u003c\/strong\u003e 3\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAnalog RCA Output:\u003c\/strong\u003e 1 stereo RCA pair\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBalanced XLR Output:\u003c\/strong\u003e 1 stereo XLR pair\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSubwoofer Output:\u003c\/strong\u003e 1 dedicated RCA line-level output for a powered subwoofer\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBalanced and Unbalanced Signal Conversion:\u003c\/strong\u003e Supports RCA-to-XLR and XLR-to-RCA signal routing\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRCA and XLR Output Operation:\u003c\/strong\u003e Both outputs operate simultaneously and cannot be independently selected\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e12V Trigger Input:\u003c\/strong\u003e 1 × 3.5mm connection\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e12V Trigger Output:\u003c\/strong\u003e 1 × 3.5mm connection\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e12V Trigger Function:\u003c\/strong\u003e Synchronized power operation with compatible upstream and downstream equipment\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVolume Control IC:\u003c\/strong\u003e NJR NJU72315\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCapacitors:\u003c\/strong\u003e Premium ELNA audio capacitors\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRCA Connections:\u003c\/strong\u003e Gold-plated RCA jacks\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOperational Amplifiers:\u003c\/strong\u003e Replaceable left and right channel op-amps\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOp-Amp Customization:\u003c\/strong\u003e Supports replacement with electrically compatible operational amplifiers\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVolume Control:\u003c\/strong\u003e Electronic volume adjustment using the front-panel control or remote\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVolume Memory:\u003c\/strong\u003e Remembers the previous volume setting independently for each input source\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eInput Selection:\u003c\/strong\u003e Front-panel power\/input selector or infrared remote\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eInput Indicators:\u003c\/strong\u003e Dedicated LEDs indicating the selected audio source\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBass Control:\u003c\/strong\u003e ±12dB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTreble Control:\u003c\/strong\u003e ±6dB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eLeft\/Right Balance Control:\u003c\/strong\u003e Adjustable stereo channel balance\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTone Bypass:\u003c\/strong\u003e Dedicated switch to bypass bass and treble adjustment circuitry\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHigh-Pass Filter:\u003c\/strong\u003e Three-position selectable HPF for RCA\/XLR main outputs\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHigh-Pass Filter Settings:\u003c\/strong\u003e Full range, 80Hz, and 120Hz\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFull-Range Frequency Response:\u003c\/strong\u003e 20Hz–20kHz (±0.2dB)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e80Hz HPF Frequency Response:\u003c\/strong\u003e 80Hz–20kHz (±0.2dB)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e120Hz HPF Frequency Response:\u003c\/strong\u003e 120Hz–20kHz (±0.2dB)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSubwoofer Output Frequency Response:\u003c\/strong\u003e 20Hz–200Hz (±0.2dB)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBalanced XLR Output Signal-to-Noise Ratio:\u003c\/strong\u003e At least 112dB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBalanced XLR Output Dynamic Range:\u003c\/strong\u003e At least 112dB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBalanced XLR Output THD+N:\u003c\/strong\u003e 0.0007% or less\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBalanced XLR Output Noise Floor:\u003c\/strong\u003e 6µV or less\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUnbalanced RCA Output Signal-to-Noise Ratio:\u003c\/strong\u003e At least 115dB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUnbalanced RCA Output Dynamic Range:\u003c\/strong\u003e At least 115dB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUnbalanced RCA Output THD+N:\u003c\/strong\u003e 0.0008% or less\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUnbalanced RCA Output Noise Floor:\u003c\/strong\u003e 4µV or less\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer-Rated SINAD:\u003c\/strong\u003e At least 113dB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer-Rated Channel Crosstalk:\u003c\/strong\u003e -130dB or lower\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRemote Control:\u003c\/strong\u003e Included infrared remote\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRemote Functions:\u003c\/strong\u003e Power on\/off, mute, volume increase\/decrease, and input selection\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRemote Compatibility:\u003c\/strong\u003e Supports selected Fosi Audio Z-Series components using dedicated product-selection controls\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRemote Batteries:\u003c\/strong\u003e Batteries not included\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFront-Panel Controls:\u003c\/strong\u003e Power\/input selector, balance, bass, treble, and volume\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRear-Panel Connections:\u003c\/strong\u003e RCA inputs, XLR inputs, RCA outputs, XLR outputs, subwoofer output, and 12V trigger connections\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFilter and Bypass Switches:\u003c\/strong\u003e Located on the underside of the enclosure\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePower Input:\u003c\/strong\u003e AC mains\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eInput Voltage Range:\u003c\/strong\u003e AC 110–240V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBuilt-In Power Amplifier:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSpeaker-Level Outputs:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBuilt-In DAC:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBuilt-In Headphone Amplifier:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHeadphone Output:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBuilt-In Phono Preamplifier:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Connectivity:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eWi-Fi Connectivity:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUSB Audio Input:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHDMI Connectivity:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOptical\/Coaxial Digital Inputs:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApp Control:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eEAN:\u003c\/strong\u003e 6976136960836\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer Warranty:\u003c\/strong\u003e 24-month limited warranty\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIncluded Accessories:\u003c\/strong\u003e Fosi Audio ZP3 Preamplifier, infrared remote control, AC power cord, 12V trigger cable, and user manual\u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003eWhat It's Great At\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile Analog Source Management:\u003c\/strong\u003e Two stereo RCA inputs and one balanced XLR input allow the ZP3 to serve as a central control hub for multiple music sources, including DACs, streamers, CD players, and compatible phono preamplifiers.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003ePremium Balanced Audio Connectivity:\u003c\/strong\u003e Balanced XLR inputs and outputs, unbalanced RCA connections, and support for RCA\/XLR signal conversion make it easy to integrate components with different analog connections while maintaining low-noise performance.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eFlexible 2.1-Channel System Integration:\u003c\/strong\u003e A dedicated powered subwoofer output and selectable full-range, 80Hz, and 120Hz high-pass filter settings let you fine-tune bass management for bookshelf speakers, floorstanding speakers, and powered subwoofers.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eCustomizable Sound and Stereo Balance:\u003c\/strong\u003e Independent bass, treble, and left\/right balance adjustments provide convenient sound customization, while Tone Bypass offers a more direct signal path when additional EQ is not desired.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eConvenient Volume and System Control:\u003c\/strong\u003e Per-input volume memory, an included infrared remote, and dedicated 12V trigger input\/output connections simplify daily operation and integration with compatible audio components.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eHigh-Fidelity Preamplifier Performance:\u003c\/strong\u003e Premium ELNA capacitors, NJR electronic volume control, and carefully optimized analog circuitry provide excellent dynamic range, low distortion, and precise sound reproduction for dedicated Hi-Fi listening.\u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003eFAQ Section\u003c\/h4\u003e  \u003cp\u003e\u003cstrong\u003eQ: What is the Fosi Audio ZP3 used for?\u003c\/strong\u003e\u003cbr\u003e A: The Fosi Audio ZP3 is a stereo preamplifier designed to manage multiple analog audio sources, control volume and tone, and send audio to compatible power amplifiers or powered speakers. It includes two stereo RCA inputs, one balanced XLR input, RCA and XLR preamplifier outputs, and a dedicated powered subwoofer output. It does not contain a built-in power amplifier, so passive speakers require a separate amplifier.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: How many audio inputs and outputs does the Fosi Audio ZP3 have?\u003c\/strong\u003e\u003cbr\u003e A: The ZP3 features three selectable stereo audio inputs: RCA 1, RCA 2, and balanced XLR. It also provides three analog output types: stereo RCA, balanced stereo XLR, and a dedicated RCA subwoofer output. Separate 12V trigger input and output connections support automatic power synchronization with compatible equipment.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio ZP3 have a 12V trigger?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The ZP3 includes both a 12V trigger input and a 12V trigger output. These connections allow compatible source components and power amplifiers to turn on and off together, making the ZP3 an excellent addition to systems built around compatible Fosi Audio products such as the ZD3 DAC and ZA3 power amplifier.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can I connect a powered subwoofer to the Fosi Audio ZP3?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The ZP3 includes a dedicated RCA subwoofer output for connecting a powered subwoofer. Its three-position high-pass filter allows you to select full-range, 80Hz, or 120Hz operation for the main RCA\/XLR outputs, helping reduce unwanted low-frequency demands on your main speakers when a subwoofer handles deeper bass.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can I adjust the bass, treble, and stereo balance on the Fosi Audio ZP3?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The ZP3 provides independent bass adjustment of ±12dB, treble adjustment of ±6dB, and a dedicated left\/right balance control. It also includes a Bypass switch that removes the bass and treble adjustment circuits from the signal path when you prefer a more direct listening experience.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can I use both the RCA and XLR outputs on the Fosi Audio ZP3?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The ZP3's RCA and XLR outputs operate simultaneously, allowing compatible equipment to receive analog audio through both connection types. However, the outputs cannot be independently switched on or off, so connected components should be configured accordingly.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio ZP3 include a remote control?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The included infrared remote allows you to turn the preamplifier on or off, mute playback, adjust volume, and switch between the three available audio inputs. The ZP3 also features per-input volume memory, automatically recalling the previous volume setting when returning to a selected source.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio ZP3 have Bluetooth, a DAC, or a phono input?\u003c\/strong\u003e\u003cbr\u003e A: No. The ZP3 is a dedicated analog preamplifier and does not include Bluetooth, Wi-Fi, a built-in DAC, or a phono preamplifier. Digital sources must be connected through an external DAC or another component with analog outputs, while turntables require a built-in or external phono preamp before connecting to one of the ZP3's RCA inputs.\u003c\/p\u003e","brand":"Fosi Audio","offers":[{"title":"Default Title","offer_id":62887288701087,"sku":"FOS-ZP3-BLK","price":199.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0495\/6910\/4031\/files\/e1fcbf9c-4a53-4938-83f6-ac27291febb3.jpg?v=1791570162"},{"product_id":"fosi-audio-s3-balanced-hi-fi-music-streamer-dac-preamplifier","title":"Fosi Audio S3 Balanced Hi-Fi Music Streamer, DAC \u0026 Preamplifier","description":"\u003ch3\u003eFosi Audio S3 Balanced Hi-Fi Music Streamer, DAC \u0026amp; Preamplifier\u003c\/h3\u003e  \u003cp\u003eBring high-resolution wireless music streaming to your home audio system with the Fosi Audio S3 Balanced Hi-Fi Music Streamer, a versatile all-in-one network streamer, digital-to-analog converter, and stereo preamplifier designed for modern music enthusiasts. Featuring a premium AKM AK4493SEQ DAC, Amlogic A113X streaming processor, and Texas Instruments OPA1612 operational amplifiers, the S3 delivers detailed, low-distortion audio with a signal-to-noise ratio of at least 120dB. With Wi-Fi 6, Bluetooth 5.3, Apple AirPlay 2, Google Cast, Spotify Connect, TIDAL Connect, and Qobuz Connect support, the S3 brings your favorite music services together in a compact component designed for high-fidelity listening.\u003c\/p\u003e  \u003cp\u003eDesigned to make wireless music streaming effortless, the Fosi Audio S3 features dual-band Wi-Fi 6 connectivity supporting both 2.4GHz and 5GHz networks, along with a dedicated Ethernet port for a reliable wired network connection. Enjoy music directly from compatible streaming apps using Spotify Connect, TIDAL Connect, Qobuz Connect, Apple AirPlay 2, or Google Cast, or access music stored on compatible network-attached storage devices through DLNA. Bluetooth 5.3 provides another convenient way to play music from compatible smartphones, tablets, and computers, with support for SBC and AAC codecs. Whether you're listening to curated playlists, discovering new albums, or exploring a personal music library, the S3 delivers flexible streaming options without the need for a separate computer.\u003c\/p\u003e  \u003cp\u003eAt the heart of the S3 is its carefully engineered digital-to-analog conversion system, built around the AKM AK4493SEQ DAC and a fully balanced analog output stage. Featuring dual Texas Instruments OPA1612 operational amplifiers, Japanese ELNA capacitors, ultra-low-noise LDO power regulation, and isolated analog and digital circuitry, the S3 is designed to minimize unwanted noise and preserve musical detail. Its manufacturer-rated total harmonic distortion plus noise is just 0.00018% or less, with a SINAD of at least 117dB. Balanced XLR and unbalanced RCA outputs allow the S3 to connect to compatible power amplifiers, powered speakers, and integrated amplifiers, while an optical digital output makes it possible to use the S3 as a dedicated network transport with an external DAC.\u003c\/p\u003e  \u003cp\u003eMore than just a music streamer, the Fosi Audio S3 can also serve as the centerpiece of a modern stereo or 2.1-channel entertainment system. A dedicated HDMI eARC input lets you connect a compatible television and enjoy TV audio through your existing stereo system, while an optical digital input and stereo RCA analog input provide connections for additional audio sources. A dedicated powered subwoofer output makes it easy to add deeper bass to your listening setup, and a 12V trigger output enables synchronized power control with compatible downstream amplifiers. This flexibility makes the S3 an excellent companion for the Fosi Audio ZA3 power amplifier or other compatible Hi-Fi components.\u003c\/p\u003e  \u003cp\u003eControl your listening experience with the Fosi Audio App, available for compatible iOS and Android devices. The app simplifies network setup, music playback, input management, and sound customization with a built-in 10-band equalizer. An included Bluetooth remote provides convenient control over power, volume, playback, input selection, and output modes from your listening position. Firmware updates help keep the S3 current with supported streaming features and improvements. With a compact chassis measuring just 6.81 inches wide, the Fosi Audio S3 combines powerful streaming capabilities, premium audio engineering, and flexible connectivity in one streamlined addition to your home audio system.\u003c\/p\u003e  \u003ch4\u003eSpecifications\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Fosi Audio\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e S3\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Network music streamer, DAC, and stereo preamplifier\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAudio Channels:\u003c\/strong\u003e 2-channel stereo\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSupported System Configuration:\u003c\/strong\u003e Stereo or 2.1-channel with powered subwoofer\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eStreaming Processor:\u003c\/strong\u003e Amlogic A113X\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDAC Chip:\u003c\/strong\u003e AKM AK4493SEQ\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOperational Amplifiers:\u003c\/strong\u003e Texas Instruments OPA1612\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAnalog Circuit Design:\u003c\/strong\u003e Fully balanced differential amplification\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eInternal Architecture:\u003c\/strong\u003e Isolated analog and digital circuit sections\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCapacitors:\u003c\/strong\u003e Japanese ELNA capacitors\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePower Regulation:\u003c\/strong\u003e Ultra-low-noise LDO regulation\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNetwork Connectivity:\u003c\/strong\u003e Dual-band Wi-Fi 6 and wired Ethernet\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eWi-Fi Standards:\u003c\/strong\u003e IEEE 802.11 a\/b\/g\/n\/ac\/ax\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eWi-Fi Frequencies:\u003c\/strong\u003e 2.4GHz and 5GHz\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eEthernet Connection:\u003c\/strong\u003e 1 × RJ45 LAN port\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eEthernet Speed:\u003c\/strong\u003e 10\/100Mbps\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Version:\u003c\/strong\u003e Bluetooth 5.3\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Profiles:\u003c\/strong\u003e A2DP, AVRCP, and BTLE\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Audio Codecs:\u003c\/strong\u003e SBC and AAC\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApple AirPlay:\u003c\/strong\u003e AirPlay 1 and AirPlay 2\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eGoogle Cast:\u003c\/strong\u003e Supported\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSpotify Connect:\u003c\/strong\u003e Supported\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTIDAL Connect:\u003c\/strong\u003e Supported\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eQobuz Connect:\u003c\/strong\u003e Supported with updated firmware\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDLNA:\u003c\/strong\u003e Supported\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNetwork Music Playback:\u003c\/strong\u003e Supports compatible network-attached storage and DLNA music libraries\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRoon Compatibility:\u003c\/strong\u003e Playback available through AirPlay 2 or Google Cast; native Roon Ready certification remains pending\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMaximum DAC PCM Capability:\u003c\/strong\u003e Up to 32-bit\/768kHz, subject to input method and firmware\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOptical Input Resolution:\u003c\/strong\u003e PCM up to 24-bit\/192kHz\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Input Resolution:\u003c\/strong\u003e PCM up to 24-bit\/48kHz\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eGoogle Cast Resolution:\u003c\/strong\u003e PCM up to 24-bit\/96kHz\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAirPlay 2 Resolution:\u003c\/strong\u003e PCM up to 16-bit\/48kHz\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHDMI eARC Input Resolution:\u003c\/strong\u003e PCM up to 24-bit\/192kHz\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eWi-Fi Streaming Resolution:\u003c\/strong\u003e PCM up to 24-bit\/192kHz in the published input specification table; higher rates depend on the supported playback path\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAudio Inputs:\u003c\/strong\u003e HDMI eARC, optical digital, stereo RCA, Bluetooth, and network streaming\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHDMI Input:\u003c\/strong\u003e 1 × HDMI eARC\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOptical Digital Input:\u003c\/strong\u003e 1 × TOSLINK\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAnalog Audio Input:\u003c\/strong\u003e 1 × stereo RCA pair\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAudio Output Types:\u003c\/strong\u003e Balanced XLR, stereo RCA, optical digital, and powered subwoofer line output\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBalanced Analog Output:\u003c\/strong\u003e 1 × stereo XLR pair\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUnbalanced Analog Output:\u003c\/strong\u003e 1 × stereo RCA pair\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDigital Audio Output:\u003c\/strong\u003e 1 × optical TOSLINK\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSubwoofer Output:\u003c\/strong\u003e 1 × RCA line-level output for a powered subwoofer\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOutput Selection:\u003c\/strong\u003e Selectable optical digital or RCA\/XLR analog output modes\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSubwoofer Output Operation:\u003c\/strong\u003e Remains active independently of the selected main output mode\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e12V Trigger:\u003c\/strong\u003e 1 × 12V trigger output\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e12V Trigger Function:\u003c\/strong\u003e Synchronized power control for compatible downstream audio equipment\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSignal-to-Noise Ratio:\u003c\/strong\u003e At least 120dB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSINAD:\u003c\/strong\u003e At least 117dB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTotal Harmonic Distortion + Noise:\u003c\/strong\u003e 0.00018% or less\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSound Customization:\u003c\/strong\u003e App-based equalization\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eEqualizer:\u003c\/strong\u003e 10-band EQ with supported updated firmware\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eControl App:\u003c\/strong\u003e Fosi Audio App\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApp Compatibility:\u003c\/strong\u003e iOS, iPadOS, and Android\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApp Functions:\u003c\/strong\u003e Initial network setup, playback management, input control, device settings, and equalization\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eComputer App:\u003c\/strong\u003e No dedicated Windows, macOS, or Linux application\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRemote Control:\u003c\/strong\u003e Included Bluetooth remote\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRemote Operating Range:\u003c\/strong\u003e Over 15 meters under suitable conditions\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRemote Functions:\u003c\/strong\u003e Power, playback, volume, mute, input switching, output selection, and pairing\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRemote Batteries:\u003c\/strong\u003e 2 AAA batteries required, not included\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFront-Panel Controls:\u003c\/strong\u003e Power\/input selection, Bluetooth pairing\/output selection, and volume control\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFront-Panel Indicators:\u003c\/strong\u003e LED indicators for input and output status\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eInput Modes:\u003c\/strong\u003e Wi-Fi\/LAN, Bluetooth, RCA, HDMI eARC, and optical\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFirmware Updates:\u003c\/strong\u003e Supported through the network\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePower Requirement:\u003c\/strong\u003e DC 12V\/1.5A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCooling:\u003c\/strong\u003e Passive chassis heat dissipation\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 17.3 × 17.3 × 4.7cm (6.81 × 6.81 × 1.85 inches)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBuilt-In Speaker Amplification:\u003c\/strong\u003e No; requires external amplification for passive speakers\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBuilt-In Headphone Amplifier:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHeadphone Output:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBuilt-In Phono Preamplifier:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUSB Audio Input:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCoaxial Digital Input:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHDMI Outputs:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer Warranty:\u003c\/strong\u003e 24-month limited warranty\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIncluded Accessories:\u003c\/strong\u003e Fosi Audio S3 Balanced Hi-Fi Streamer, Bluetooth remote control, DC power adapter, optical cable, and quick guide\u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003eWhat It's Great At\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eHigh-Resolution Wireless Music Streaming:\u003c\/strong\u003e Wi-Fi 6, Ethernet, Apple AirPlay 2, Google Cast, Spotify Connect, TIDAL Connect, Qobuz Connect, and DLNA provide convenient access to streaming services and personal music libraries.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003ePremium AKM Digital-to-Analog Conversion:\u003c\/strong\u003e The AKM AK4493SEQ DAC, OPA1612 operational amplifiers, and balanced audio circuitry deliver detailed, low-distortion sound with a signal-to-noise ratio of at least 120dB.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eFlexible Stereo and Home Theater Connectivity:\u003c\/strong\u003e HDMI eARC, optical digital, and RCA inputs allow the S3 to accommodate televisions, external audio sources, and music streaming, while a dedicated powered subwoofer output supports 2.1-channel systems.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eBalanced XLR and Digital Audio Outputs:\u003c\/strong\u003e Stereo XLR and RCA outputs provide convenient connections for compatible amplifiers and powered speakers, while optical digital output allows the S3 to operate as a dedicated network music transport.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eConvenient App and Remote Control:\u003c\/strong\u003e The Fosi Audio App provides streaming setup, music playback management, and 10-band EQ customization, while the included Bluetooth remote offers easy everyday control from your listening position.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eEasy Hi-Fi System Integration:\u003c\/strong\u003e A dedicated 12V trigger output, compact enclosure, and versatile analog and digital connections make the S3 an excellent companion for compatible power amplifiers and existing stereo audio systems.\u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003eFAQ Section\u003c\/h4\u003e  \u003cp\u003e\u003cstrong\u003eQ: What is the Fosi Audio S3 Balanced Hi-Fi Streamer?\u003c\/strong\u003e\u003cbr\u003e A: The Fosi Audio S3 is an all-in-one network music streamer, DAC, and stereo preamplifier designed to bring wireless music services and digital audio connectivity to an existing Hi-Fi system. It supports Wi-Fi, Ethernet, Bluetooth, Apple AirPlay 2, Google Cast, Spotify Connect, TIDAL Connect, Qobuz Connect, and DLNA, with balanced XLR, RCA, and optical outputs for connecting compatible audio equipment.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio S3 support Apple AirPlay and Bluetooth?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The S3 supports Apple AirPlay 1 and AirPlay 2, allowing compatible Apple devices to stream audio over a network. It also features Bluetooth 5.3 with SBC and AAC codec support for wireless playback from compatible smartphones, tablets, and computers.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: What music streaming services does the Fosi Audio S3 support?\u003c\/strong\u003e\u003cbr\u003e A: The S3 supports Spotify Connect, TIDAL Connect, Qobuz Connect, Apple AirPlay 2, Google Cast, and DLNA streaming. Qobuz Connect support is available with updated firmware. These technologies allow playback from compatible music apps and network music libraries, although supported features and maximum audio resolutions vary by service and connection type.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio S3 support Roon Ready?\u003c\/strong\u003e\u003cbr\u003e A: Native Roon Ready certification is still pending and should not be considered an active certified feature. However, the S3 can receive audio from Roon through compatible AirPlay 2 or Google Cast connections. Direct Roon Ready integration will depend on future certification and firmware support.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can I connect the Fosi Audio S3 to my television?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The S3 includes one HDMI eARC input for connecting a compatible television and playing TV audio through a connected stereo system. It also features an optical digital input for compatible TVs and other digital sources. The S3 is designed for stereo audio playback rather than multichannel home theater decoding and requires external amplification or powered speakers.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can I connect a powered subwoofer to the Fosi Audio S3?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The S3 includes a dedicated RCA line-level output for a powered subwoofer, allowing you to build a 2.1-channel audio system with compatible speakers and amplification. The subwoofer output remains active regardless of whether the main output mode is set to analog RCA\/XLR or optical digital.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio S3 have a 12V trigger?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The S3 includes a 12V trigger output for synchronizing power with compatible downstream components. This allows a connected power amplifier, such as the Fosi Audio ZA3, to turn on and off automatically with the S3 when the proper trigger connection is used.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can I control the Fosi Audio S3 with an app?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The Fosi Audio App is available for compatible iPhone, iPad, and Android devices. It provides network setup, playback management, device settings, and a 10-band equalizer on supported firmware. The S3 also includes a Bluetooth remote for convenient playback, input selection, volume, and output control without using your phone.\u003c\/p\u003e","brand":"Fosi Audio","offers":[{"title":"Default Title","offer_id":62887289520287,"sku":"FOS-S3-SIL","price":259.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0495\/6910\/4031\/files\/1af46ac2-1f07-42ba-b863-6d80917f485c.jpg?v=1791570574"},{"product_id":"fosi-audio-v3-mono-240w-monoblock-power-amplifier-with-48v-5a-power-supply","title":"Fosi Audio V3 Mono 240W Monoblock Power Amplifier with 48V\/5A Power Supply","description":"\u003ch3\u003eFosi Audio V3 Mono 240W Monoblock Power Amplifier with 48V\/5A Power Supply\u003c\/h3\u003e  \u003cp\u003eExperience powerful, high-fidelity sound with the Fosi Audio V3 Mono Monoblock Power Amplifier, a compact Class-D amplifier designed to bring precision, clarity, and exceptional performance to your home audio system. Powered by the Texas Instruments TPA3255 amplifier chip and featuring advanced Post-Filter Feedback (PFFB) technology, the V3 Mono delivers up to 240 watts of rated power into 4 ohms with the included 48V\/5A power supply. Its dedicated single-channel design allows each amplifier to independently power one passive speaker, making it an excellent solution for building a dual-mono stereo system, expanding a multichannel home theater setup, or providing dedicated amplification for demanding speakers.\u003c\/p\u003e  \u003cp\u003eEngineered for clean, accurate audio reproduction, the V3 Mono incorporates PFFB technology to address load-dependent performance variations commonly associated with Class-D amplifiers. By feeding the amplified signal back through the output filter, this advanced circuit design helps minimize distortion, improve frequency response consistency, and maintain accurate sound reproduction across a wide range of speaker impedances. With a signal-to-noise ratio of at least 123dB, total harmonic distortion below 0.006%, and a SINAD rating of 101dB through its balanced input, the V3 Mono delivers impressive clarity, dynamic range, and detailed musical presentation.\u003c\/p\u003e  \u003cp\u003eDesigned for seamless integration into modern Hi-Fi systems, the Fosi Audio V3 Mono provides balanced XLR and 1\/4-inch TRS connectivity through a shared combo input, along with a dedicated unbalanced RCA input. A convenient input selector lets you choose between balanced and unbalanced sources, while adjustable RCA input gain settings of 25dB and 31dB provide additional flexibility when matching the amplifier with different preamplifiers and source components. Supporting passive speakers with impedances ranging from 2 to 8 ohms, the V3 Mono can be integrated with a wide selection of bookshelf and floorstanding speakers. Pair two units together to create a dedicated stereo system with independent monoblock amplification for each channel.\u003c\/p\u003e  \u003cp\u003eInside its durable aluminum chassis, the V3 Mono features carefully selected audio components, including Japanese Nichicon and ELNA capacitors, German WIMA capacitors, and Japanese Sumida inductors. An upgraded four-layer printed circuit board helps reduce electrical interference and optimize signal integrity, while two replaceable NE5532 operational amplifier positions allow enthusiasts to experiment with compatible DIP8 op-amps for personalized sound tuning. The amplifier's innovative full-body heat dissipation system places the TPA3255 chip in direct thermal contact with the chassis, allowing heat to dissipate through the enclosure. Dual side ventilation openings further improve airflow to support stable performance during extended listening sessions.\u003c\/p\u003e  \u003cp\u003eThe Fosi Audio V3 Mono also includes practical features for everyday operation. Its three-position On\/Auto\/Off switch provides manual power control or automatic signal-sensing operation, allowing the amplifier to enter standby after approximately 10 minutes without an audio signal and automatically resume playback when a signal returns. This eliminates the need to manually power the amplifier on and off during regular use. With its compact footprint, premium components, balanced connectivity, and included 48V\/5A power supply, the Fosi Audio V3 Mono is an excellent choice for listeners seeking powerful, efficient, and customizable monoblock amplification without the size and complexity of traditional high-power amplifiers.\u003c\/p\u003e  \u003ch4\u003eSpecifications\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Fosi Audio\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e V3 Mono\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e V3 MONO-48V5A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Monoblock power amplifier\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmplifier Class:\u003c\/strong\u003e Class-D\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAudio Channels:\u003c\/strong\u003e 1.0 (single-channel monoblock)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmplifier Chip:\u003c\/strong\u003e Texas Instruments TPA3255\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmplifier Technology:\u003c\/strong\u003e Post-Filter Feedback (PFFB)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRated Output Power with Included 48V\/5A Supply:\u003c\/strong\u003e 240 watts × 1 into 4 ohms\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSupported Speaker Impedance:\u003c\/strong\u003e 2–8 ohms\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e 10Hz–30kHz (±0.06dB)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSignal-to-Noise Ratio:\u003c\/strong\u003e At least 123dB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDynamic Range:\u003c\/strong\u003e At least 123dB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTotal Harmonic Distortion:\u003c\/strong\u003e Less than 0.006%\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSINAD with Balanced XLR Input:\u003c\/strong\u003e 101dB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSINAD with RCA Input:\u003c\/strong\u003e 93dB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAudio Input Connections:\u003c\/strong\u003e RCA and combined XLR\/1\/4-inch TRS\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUnbalanced Analog Input:\u003c\/strong\u003e 1 × RCA\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBalanced Analog Input:\u003c\/strong\u003e 1 × XLR\/1\/4-inch TRS combo jack\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBalanced Input Compatibility:\u003c\/strong\u003e XLR or 1\/4-inch TRS cables\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eInput Selection:\u003c\/strong\u003e Dedicated RCA\/balanced input selector switch\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBalanced Input Gain:\u003c\/strong\u003e 20dB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRCA Input Gain Settings:\u003c\/strong\u003e Selectable 25dB or 31dB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eGain Selection:\u003c\/strong\u003e Rear-panel gain switch for RCA input\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eGain Switch Function:\u003c\/strong\u003e Adjusts RCA input gain; does not affect balanced input mode\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSpeaker Outputs:\u003c\/strong\u003e 1 pair of speaker binding-post terminals\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSpeaker Connections:\u003c\/strong\u003e Supports banana plugs and bare speaker wire\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSpeaker A\/B Selector:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSimultaneous Speaker Channels:\u003c\/strong\u003e 1\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDual-Mono System Compatibility:\u003c\/strong\u003e Two V3 Mono amplifiers can independently power the left and right speakers in a stereo system\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMultichannel System Integration:\u003c\/strong\u003e Additional units can provide dedicated amplification for compatible individual home theater channels\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOperational Amplifiers:\u003c\/strong\u003e NE5532\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eReplaceable Op-Amps:\u003c\/strong\u003e 2 replaceable dual-channel DIP8 op-amp positions\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCompatible Op-Amp Examples:\u003c\/strong\u003e Sparkos SS3602, MUSES02, OPA2604, Burson V5i, and other electrically compatible DIP8 dual operational amplifiers\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCapacitors:\u003c\/strong\u003e Japanese Nichicon and ELNA capacitors; German WIMA capacitors\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eInductors:\u003c\/strong\u003e Japanese Sumida inductors\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCircuit Board:\u003c\/strong\u003e Upgraded four-layer PCB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCooling System:\u003c\/strong\u003e Full-body chassis heat dissipation with dual side ventilation openings\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal Design:\u003c\/strong\u003e Amplifier chip thermally coupled to the enclosure for efficient heat transfer\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePower Control:\u003c\/strong\u003e Three-position On\/Auto\/Off switch\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAutomatic Signal Sensing:\u003c\/strong\u003e Yes\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAutomatic Standby:\u003c\/strong\u003e After approximately 10 minutes without an audio signal\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAutomatic Wake:\u003c\/strong\u003e Reactivates when an audio signal is detected\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e12V Trigger Input:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e12V Trigger Output:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVolume Control:\u003c\/strong\u003e No dedicated volume adjustment; designed for use with a compatible preamplifier or variable-output source\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBass and Treble Controls:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePower Input:\u003c\/strong\u003e DC 32–48V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIncluded Power Supply:\u003c\/strong\u003e 48V\/5A DC external power adapter\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIncluded Power Supply Rating:\u003c\/strong\u003e 240W\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eChassis Construction:\u003c\/strong\u003e Compact metal enclosure with integrated heat dissipation\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 105 × 35 × 142mm (approximately 4.13 × 1.38 × 5.59 inches)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e Approximately 480g (1.06 lbs)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Connectivity:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eWi-Fi Connectivity:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBuilt-In Music Streaming:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApple AirPlay:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBuilt-In DAC:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDigital Audio Inputs:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHDMI Inputs:\u003c\/strong\u003e 0\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHDMI Outputs:\u003c\/strong\u003e 0\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSubwoofer Output:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHeadphone Output:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApp Control:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRemote Control:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eEAN:\u003c\/strong\u003e 6976136960447\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer Warranty:\u003c\/strong\u003e 24-month limited warranty\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIncluded Accessories:\u003c\/strong\u003e Fosi Audio V3 Mono Power Amplifier, 48V\/5A power supply, and user manual\u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003eWhat It's Great At\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003ePowerful Dedicated Monoblock Amplification:\u003c\/strong\u003e The Texas Instruments TPA3255 Class-D amplifier delivers 240 watts of rated power into 4 ohms with the included 48V\/5A power supply, providing dedicated amplification for a single passive speaker.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eBuilding Dual-Mono Stereo Systems:\u003c\/strong\u003e Pair two V3 Mono amplifiers to independently power the left and right speakers, creating a flexible stereo setup with dedicated amplification for each channel.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eAccurate Sound with PFFB Technology:\u003c\/strong\u003e Post-Filter Feedback circuitry minimizes load-dependent frequency response variations and distortion, helping deliver clean, detailed audio across compatible speaker loads.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eBalanced and Unbalanced Connectivity:\u003c\/strong\u003e A combined XLR\/1\/4-inch TRS balanced input and dedicated RCA connection provide convenient compatibility with a wide range of preamplifiers, DACs, and line-level audio sources.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003ePremium Audiophile Components:\u003c\/strong\u003e Nichicon, ELNA, and WIMA capacitors, Sumida inductors, and an upgraded four-layer PCB support low-noise, high-fidelity performance, while replaceable op-amps allow additional customization.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eEfficient Cooling and Automatic Operation:\u003c\/strong\u003e Full-body chassis heat dissipation, side ventilation, and automatic signal-sensing standby provide reliable performance with convenient everyday operation.\u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003eFAQ Section\u003c\/h4\u003e  \u003cp\u003e\u003cstrong\u003eQ: How much power does the Fosi Audio V3 Mono deliver?\u003c\/strong\u003e\u003cbr\u003e A: The Fosi Audio V3 Mono delivers a manufacturer-rated 240 watts into 4 ohms with the included 48V\/5A power supply. It uses a Texas Instruments TPA3255 Class-D amplifier chip with PFFB technology to provide efficient, low-distortion amplification for a single passive speaker. Actual output depends on speaker impedance and operating conditions.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Is the Fosi Audio V3 Mono a stereo amplifier?\u003c\/strong\u003e\u003cbr\u003e A: No. The V3 Mono is a single-channel monoblock amplifier designed to power one passive speaker. To create a traditional two-channel stereo system, you will need two V3 Mono amplifiers, with one powering the left speaker and the other powering the right speaker.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does this version of the Fosi Audio V3 Mono include the 48V power supply?\u003c\/strong\u003e\u003cbr\u003e A: Yes. This version includes one 48V\/5A external power supply and is rated to deliver 240 watts into 4 ohms. The V3 Mono is also available in other power supply configurations, but this particular model includes the 48V\/5A adapter.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: What audio inputs does the Fosi Audio V3 Mono have?\u003c\/strong\u003e\u003cbr\u003e A: The V3 Mono includes one RCA unbalanced input and one balanced XLR\/1\/4-inch TRS combo input. A dedicated switch allows selection between RCA and balanced input modes. The RCA input also includes selectable 25dB and 31dB gain settings for matching different source components.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio V3 Mono have a 12V trigger?\u003c\/strong\u003e\u003cbr\u003e A: No. The V3 Mono does not include a dedicated 12V trigger input or output. Instead, it features automatic signal-sensing operation. When set to Auto mode, the amplifier enters standby after approximately 10 minutes without an audio signal and automatically reactivates when a signal returns.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: What speakers are compatible with the Fosi Audio V3 Mono?\u003c\/strong\u003e\u003cbr\u003e A: The V3 Mono supports passive speakers with impedances ranging from 2 to 8 ohms. It can be used with many bookshelf and floorstanding speakers, provided their power handling and electrical requirements are compatible. Each V3 Mono amplifier powers only one speaker, so a stereo pair requires two amplifiers.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can I replace the op-amps in the Fosi Audio V3 Mono?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The V3 Mono includes two replaceable DIP8 operational amplifier positions, allowing enthusiasts to experiment with compatible aftermarket op-amps. Options include models such as the Sparkos SS3602, MUSES02, OPA2604, and compatible Burson designs. Always confirm electrical compatibility and correct installation orientation before replacing components.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio V3 Mono have Bluetooth, streaming, or a built-in DAC?\u003c\/strong\u003e\u003cbr\u003e A: No. The V3 Mono is a dedicated analog power amplifier and does not include Bluetooth, Wi-Fi, music streaming, a built-in DAC, or digital audio inputs. To play music from digital sources, connect a compatible external DAC, music streamer, or preamplifier with RCA or balanced analog output. A preamplifier or variable-output source is recommended for volume control.\u003c\/p\u003e","brand":"Fosi Audio","offers":[{"title":"Default Title","offer_id":62887291486367,"sku":"FOS-V3MONO-BLK","price":139.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0495\/6910\/4031\/files\/89099a90-6661-40c1-b0ac-30e7726a7fbc.jpg?v=1791571045"},{"product_id":"fosi-audio-mc331-tube-integrated-amplifier-with-dac-bluetooth","title":"Fosi Audio MC331 Tube Integrated Amplifier with DAC \u0026 Bluetooth","description":"\u003ch3\u003eFosi Audio MC331 Tube Integrated Amplifier with DAC \u0026amp; Bluetooth\u003c\/h3\u003e  \u003cp\u003eBring vintage-inspired style and modern Hi-Fi performance to your listening space with the Fosi Audio MC331 Tube Integrated Amplifier with DAC \u0026amp; Bluetooth, a versatile all-in-one audio solution designed for music enthusiasts who appreciate the character of vacuum tubes and the convenience of modern connectivity. Combining a hybrid tube preamplifier design, Texas Instruments TPA3221 Class-D amplification, and a built-in digital-to-analog converter, the MC331 delivers up to 105 watts per channel into 4 ohms at its maximum rated output. With Bluetooth wireless streaming, USB, optical, coaxial, and RCA inputs, along with a built-in headphone amplifier and classic analog VU meter, the MC331 brings multiple audio components together in one compact and stylish desktop amplifier.\u003c\/p\u003e  \u003cp\u003eDesigned to combine the character of traditional tube audio with the efficiency of modern amplification, the MC331 features two replaceable 5654W vacuum tubes that contribute to its distinctive sound and appearance. These tubes work alongside the Texas Instruments TPA3221 amplifier chip to deliver an engaging listening experience with clear vocals, detailed instruments, and dynamic musical reproduction. The front-panel analog VU meter adds a classic Hi-Fi aesthetic, displaying audio signal activity with a moving needle that responds to your music. With its exposed vacuum tubes, retro-inspired styling, and compact enclosure, the MC331 makes an attractive centerpiece for desktop listening stations, bookshelf speaker systems, and smaller dedicated Hi-Fi setups.\u003c\/p\u003e  \u003cp\u003eConnectivity is one of the MC331's greatest strengths. Bluetooth wireless streaming with SBC and AAC codec support makes it easy to enjoy music from compatible smartphones, tablets, and computers, while USB, optical, and coaxial digital inputs allow direct connections to digital audio sources. A dedicated stereo RCA input accommodates traditional analog components such as CD players, external DACs, and turntables equipped with a built-in or external phono preamplifier. The integrated DAC supports digital audio playback up to 24-bit\/96kHz through compatible USB, optical, and coaxial connections, providing a convenient way to enjoy high-quality audio without requiring a separate DAC.\u003c\/p\u003e  \u003cp\u003eBeyond driving passive speakers, the Fosi Audio MC331 includes a dedicated 3.5mm headphone output for personal listening with compatible headphones rated from 32 to 300 ohms. A rear-panel preamplifier output also allows connection to additional compatible audio equipment, including powered subwoofers, making it possible to expand into a 2.1-channel system. Independent bass and treble controls provide convenient sound adjustments, allowing you to tailor playback to your speakers, room, or musical preferences. The included infrared remote adds another level of convenience with control over power, volume, input selection, Bluetooth playback, bass, and treble from your listening position.\u003c\/p\u003e  \u003cp\u003ePowered by an included 24V\/4.5A adapter, the MC331 delivers flexible stereo amplification in a compact enclosure that fits comfortably into a desktop or entertainment center setup. Its multifunction volume knob provides quick access to input switching and power control, while front-panel indicators make it easy to identify the selected source. The replaceable vacuum tubes allow enthusiasts to experiment with compatible alternatives such as 6AK5, 6AK5W, 6J1, and 6Zh1P to personalize their listening experience. Whether you're streaming music wirelessly, playing CDs, connecting a computer, or enjoying a private headphone listening session, the Fosi Audio MC331 combines modern functionality with the visual appeal of classic tube Hi-Fi equipment.\u003c\/p\u003e  \u003ch4\u003eSpecifications\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Fosi Audio\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e MC331\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Hybrid tube integrated stereo amplifier with DAC, Bluetooth, and headphone amplifier\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmplifier Configuration:\u003c\/strong\u003e Hybrid vacuum tube and Class-D amplification\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAudio Channels:\u003c\/strong\u003e 2.0-channel stereo\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSupported System Configuration:\u003c\/strong\u003e Stereo or 2.1-channel with compatible powered subwoofer\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmplifier Chip:\u003c\/strong\u003e Texas Instruments TPA3221\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVacuum Tubes:\u003c\/strong\u003e 2 × 5654W\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTube Configuration:\u003c\/strong\u003e Replaceable vacuum tubes\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCompatible Replacement Tubes:\u003c\/strong\u003e 6AK5, 6AK5W, 6Zh1P, 6J1, 6J1P, EF95, and other compatible tube models\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTube Warm-Up Time:\u003c\/strong\u003e Approximately 15 seconds after powering on\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBuilt-In DAC:\u003c\/strong\u003e Yes\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBuilt-In Headphone Amplifier:\u003c\/strong\u003e Yes\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMaximum Rated Speaker Output Power:\u003c\/strong\u003e 105 watts × 2 into 4 ohms\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSupported Speaker Impedance:\u003c\/strong\u003e 4–8 ohms\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e 20Hz–20kHz (±1dB)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSignal-to-Noise Ratio:\u003c\/strong\u003e At least 100dB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDynamic Range:\u003c\/strong\u003e At least 100dB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTotal Harmonic Distortion:\u003c\/strong\u003e 0.03% or less\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTotal Audio Input Types:\u003c\/strong\u003e 5\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAnalog Audio Input:\u003c\/strong\u003e 1 × stereo RCA pair\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUSB Audio Input:\u003c\/strong\u003e 1 × USB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOptical Digital Input:\u003c\/strong\u003e 1 × TOSLINK\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCoaxial Digital Input:\u003c\/strong\u003e 1 × coaxial S\/PDIF\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eWireless Audio Input:\u003c\/strong\u003e Bluetooth\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eInput Modes:\u003c\/strong\u003e RCA, Bluetooth, USB, optical, and coaxial\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMaximum USB Audio Resolution:\u003c\/strong\u003e PCM up to 24-bit\/96kHz\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMaximum Optical Audio Resolution:\u003c\/strong\u003e PCM up to 24-bit\/96kHz\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMaximum Coaxial Audio Resolution:\u003c\/strong\u003e PCM up to 24-bit\/96kHz\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Audio Codecs:\u003c\/strong\u003e SBC and AAC\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Wireless Range:\u003c\/strong\u003e At least 10 meters (approximately 33 feet) under suitable conditions\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Antenna:\u003c\/strong\u003e External antenna, included\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTotal Audio Output Types:\u003c\/strong\u003e 3\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSpeaker Outputs:\u003c\/strong\u003e 1 stereo pair of binding-post speaker terminals\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHeadphone Output:\u003c\/strong\u003e 1 × 3.5mm stereo headphone jack\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePreamplifier Output:\u003c\/strong\u003e 1 × 3.5mm stereo pre-out\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHeadphone Impedance Compatibility:\u003c\/strong\u003e 32–300 ohms\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHeadphone Priority:\u003c\/strong\u003e Inserting headphones mutes the passive speaker outputs\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePowered Subwoofer Compatibility:\u003c\/strong\u003e Supported through the preamplifier output with an appropriate connection\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSpeaker A\/B Selector:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSpeaker Pairs Supported:\u003c\/strong\u003e 1\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVolume Control:\u003c\/strong\u003e Front-panel multifunction rotary knob\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBass Control:\u003c\/strong\u003e Independent front-panel bass adjustment\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTreble Control:\u003c\/strong\u003e Independent front-panel treble adjustment\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVU Meter:\u003c\/strong\u003e 1 front-panel analog needle-style meter\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eInput Indicators:\u003c\/strong\u003e Front-panel LED source indicators\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRemote Control:\u003c\/strong\u003e Included infrared remote\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRemote Functions:\u003c\/strong\u003e Power on\/off, mute, volume adjustment, previous track, play\/pause, next track, input selection, Bluetooth mode, Bluetooth pairing reset, bass adjustment, and treble adjustment\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePower Control:\u003c\/strong\u003e Multifunction power, input selection, and volume knob\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePower Input:\u003c\/strong\u003e DC 19–24V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIncluded Power Supply:\u003c\/strong\u003e 24V\/4.5A DC adapter\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmplifier Design:\u003c\/strong\u003e Compact desktop enclosure with exposed vacuum tubes\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e Approximately 10 × 2 × 2.7 inches (manufacturer-listed dimensions)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApple AirPlay:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eWi-Fi Connectivity:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBuilt-In Music Streaming Services:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHDMI Inputs:\u003c\/strong\u003e 0\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHDMI Outputs:\u003c\/strong\u003e 0\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e12V Trigger Input:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e12V Trigger Output:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBuilt-In Phono Preamplifier:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApp Control:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer Warranty:\u003c\/strong\u003e 24-month limited warranty\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIncluded Accessories:\u003c\/strong\u003e Fosi Audio MC331 amplifier, 2 × 5654W vacuum tubes, 2 × tube covers, Bluetooth antenna, infrared remote control, 24V\/4.5A power adapter, and user manual\u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003eWhat It's Great At\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eClassic Tube Sound with Modern Amplification:\u003c\/strong\u003e Two replaceable 5654W vacuum tubes combine with efficient Texas Instruments TPA3221 Class-D amplification to deliver an engaging listening experience with the distinctive character of tube-based Hi-Fi equipment.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eVersatile All-in-One Audio Connectivity:\u003c\/strong\u003e Bluetooth, USB, optical, coaxial, and stereo RCA inputs accommodate a wide range of digital and analog sources, reducing the need for multiple separate components.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003ePowerful Stereo Speaker Amplification:\u003c\/strong\u003e With a maximum manufacturer-rated output of 105 watts per channel into 4 ohms, the MC331 provides capable amplification for compatible passive bookshelf and compact floorstanding speakers.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eDedicated Headphone and Preamplifier Outputs:\u003c\/strong\u003e A 3.5mm headphone output supports compatible headphones from 32 to 300 ohms, while a separate pre-out provides flexibility for connecting additional audio equipment or a powered subwoofer.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eClassic Analog VU Meter Design:\u003c\/strong\u003e The front-panel VU meter and exposed vacuum tubes create a vintage-inspired visual presentation that adds personality to modern desktop and home Hi-Fi systems.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eConvenient Sound Customization and Control:\u003c\/strong\u003e Independent bass and treble adjustments, replaceable vacuum tubes, a multifunction volume knob, and an included infrared remote make it easy to tailor and manage your listening experience.\u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003eFAQ Section\u003c\/h4\u003e  \u003cp\u003e\u003cstrong\u003eQ: What is the Fosi Audio MC331 Tube Integrated Amplifier?\u003c\/strong\u003e\u003cbr\u003e A: The Fosi Audio MC331 is a 2-channel hybrid tube integrated amplifier that combines a vacuum tube preamplifier stage, Class-D speaker amplification, built-in DAC, Bluetooth connectivity, and headphone amplification. It allows you to connect multiple digital and analog audio sources while powering compatible passive speakers or wired headphones.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: How much power does the Fosi Audio MC331 deliver?\u003c\/strong\u003e\u003cbr\u003e A: The MC331 has a maximum manufacturer-rated output of 105 watts per channel into 4 ohms using the included 24V\/4.5A power adapter. It supports passive speakers rated between 4 and 8 ohms. This is a maximum output specification rather than a continuous RMS power rating.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio MC331 support Bluetooth and wireless music streaming?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The MC331 includes Bluetooth wireless audio connectivity with SBC and AAC codec support, allowing you to stream music from compatible smartphones, tablets, and computers. It does not include built-in Wi-Fi, Apple AirPlay, Spotify Connect, or other independent network streaming services.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: What audio inputs does the Fosi Audio MC331 have?\u003c\/strong\u003e\u003cbr\u003e A: The MC331 features five selectable input types: stereo RCA, USB, optical digital, coaxial digital, and Bluetooth. Its built-in DAC supports digital audio playback up to 24-bit\/96kHz through compatible USB, optical, and coaxial connections.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can I connect headphones to the Fosi Audio MC331?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The MC331 includes a dedicated 3.5mm headphone output designed for compatible wired headphones with impedances from 32 to 300 ohms. When headphones are connected, the amplifier automatically prioritizes headphone playback and mutes the passive speaker outputs.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can I connect a subwoofer to the Fosi Audio MC331?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The MC331 includes a rear-panel preamplifier output that can connect to a compatible powered subwoofer using an appropriate cable. This allows you to expand a traditional stereo speaker setup into a 2.1-channel system. The MC331 does not include a dedicated speaker-level subwoofer amplifier or adjustable subwoofer crossover.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can I replace the vacuum tubes in the Fosi Audio MC331?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The MC331 features two replaceable 5654W vacuum tubes. Compatible alternatives include 6AK5, 6AK5W, 6Zh1P, 6J1, and other electrically compatible models. Changing tubes allows enthusiasts to experiment with different tube characteristics. Always power off the amplifier, disconnect it from power, and allow the tubes to cool completely before replacing them.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio MC331 have a remote control and adjustable bass and treble?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The MC331 includes independent bass and treble controls on the front panel, along with an infrared remote that supports power, volume, mute, input selection, Bluetooth playback, and tone adjustments. A multifunction volume knob also allows convenient operation directly from the amplifier.\u003c\/p\u003e","brand":"Fosi Audio","offers":[{"title":"Default Title","offer_id":62887292960927,"sku":"FOS-MC331-BLK","price":129.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0495\/6910\/4031\/files\/c2c1b121-3906-4846-9993-5dfea1956876.jpg?v=1791571444"},{"product_id":"fosi-audio-zd3-fully-balanced-desktop-dac-preamplifier-1","title":"Fosi Audio ZD3 Fully Balanced Desktop DAC \u0026 Preamplifier","description":"\u003ch3\u003eFosi Audio ZD3 Fully Balanced Desktop DAC \u0026amp; Preamplifier\u003c\/h3\u003e  \u003cp\u003eExperience high-resolution audio with the Fosi Audio ZD3 Fully Balanced Desktop DAC \u0026amp; Preamplifier, a versatile Hi-Fi component designed to bring exceptional digital-to-analog conversion, modern connectivity, and convenient system control to your listening setup. Featuring the flagship ESS ES9039Q2M DAC, XMOS XU316 USB processor, and fully balanced analog circuitry, the ZD3 delivers detailed, low-distortion sound with support for PCM audio up to 32-bit\/768kHz and native DSD512. With HDMI ARC, USB, optical, coaxial, and Bluetooth inputs, along with balanced XLR and stereo RCA outputs, the ZD3 provides a flexible foundation for premium desktop and home audio systems.\u003c\/p\u003e  \u003cp\u003eEngineered for accurate, high-fidelity sound reproduction, the ZD3 combines its ESS Sabre DAC with LME49720 operational amplifiers and Fosi Audio's proprietary current-to-voltage conversion circuitry. High-precision wafer resistors and low-drift capacitors help minimize signal processing errors and maintain accurate channel balance, while the fully balanced architecture reduces unwanted noise and crosstalk. Delivering a signal-to-noise ratio of at least 126dB and total harmonic distortion plus noise below 0.00008%, the ZD3 provides an exceptionally clean foundation for enjoying high-resolution digital music. Its balanced XLR outputs deliver 5Vrms, while the unbalanced RCA outputs provide 2.5Vrms for compatibility with a wide range of amplifiers and powered speakers.\u003c\/p\u003e  \u003cp\u003eDesigned to accommodate modern digital entertainment systems, the Fosi Audio ZD3 features five selectable audio input types. The USB-B input supports high-resolution PCM up to 32-bit\/768kHz and DSD512 from compatible computers, while optical and coaxial inputs accommodate digital audio sources such as CD transports and music streamers. Bluetooth 5.0 with aptX HD, aptX, AAC, and SBC support allows convenient wireless music playback from compatible smartphones, tablets, and computers. A dedicated HDMI ARC input also makes it easy to connect a compatible television and enjoy TV audio through a high-quality stereo system. HDMI CEC functionality supports synchronized power and volume control with compatible televisions, simplifying everyday operation.\u003c\/p\u003e  \u003cp\u003eMore than a standalone DAC, the ZD3 also functions as a stereo preamplifier with adjustable volume control. Its selectable Bypass mode disables the internal preamplifier volume adjustment and provides a fixed-level analog output for connecting to equipment with its own volume control. In preamplifier mode, the front-panel multifunction knob and included infrared remote allow convenient volume adjustments, input selection, and playback control. Balanced XLR and RCA outputs provide flexibility for connecting powered speakers, integrated amplifiers, or dedicated power amplifiers. Both 12V trigger input and output connections support synchronized power operation with compatible components, making the ZD3 particularly well suited for systems built around the Fosi Audio ZA3 power amplifier.\u003c\/p\u003e  \u003cp\u003eThe ZD3 also offers customization and convenience for audio enthusiasts. Its replaceable DIP8 operational amplifiers allow users to experiment with compatible alternatives, including the Sparkos SS3602, MUSES02, and OPA2134PA. A 1.5-inch OLED display provides clear information about the selected input, sampling rate, audio format, and volume level, while the included remote allows control from your listening position. Housed in a compact enclosure designed to complement Fosi Audio's Z-Series components, the ZD3 combines modern styling, high-performance audio engineering, and flexible connectivity. Whether you're upgrading your computer audio, connecting a television to a dedicated stereo system, or building a balanced Hi-Fi setup, the Fosi Audio ZD3 delivers exceptional versatility and detailed sound reproduction.\u003c\/p\u003e  \u003ch4\u003eSpecifications\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Fosi Audio\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e ZD3\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Fully balanced desktop DAC and stereo preamplifier\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAudio Channels:\u003c\/strong\u003e 2-channel stereo\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDAC Chip:\u003c\/strong\u003e ESS Sabre ES9039Q2M\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUSB Audio Processor:\u003c\/strong\u003e XMOS XU316\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Processor:\u003c\/strong\u003e Qualcomm 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Bluetooth\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTotal Audio Output Types:\u003c\/strong\u003e 2\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBalanced Analog Output:\u003c\/strong\u003e 1 × stereo XLR pair\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUnbalanced Analog Output:\u003c\/strong\u003e 1 × stereo RCA pair\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eXLR Output Level:\u003c\/strong\u003e 5Vrms at fixed output level\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRCA Output Level:\u003c\/strong\u003e 2.5Vrms at fixed output level\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e12V Trigger Input:\u003c\/strong\u003e 1 × 3.5mm\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e12V Trigger Output:\u003c\/strong\u003e 1 × 3.5mm\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e12V Trigger Function:\u003c\/strong\u003e Synchronized power control with compatible upstream and downstream audio components\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSignal-to-Noise Ratio:\u003c\/strong\u003e At least 126dB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTotal Harmonic Distortion + Noise:\u003c\/strong\u003e Less than 0.00008%\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDynamic Range:\u003c\/strong\u003e 126dB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNoise Floor:\u003c\/strong\u003e 2µV or less\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e 20Hz–20kHz (±0.1dB)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Version:\u003c\/strong\u003e 5.0\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Audio Codecs:\u003c\/strong\u003e SBC, AAC, aptX, and aptX HD\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Wireless Range:\u003c\/strong\u003e At least 13 meters (approximately 43 feet) under suitable conditions\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Antenna:\u003c\/strong\u003e External antenna\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHDMI ARC:\u003c\/strong\u003e Supported\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHDMI CEC:\u003c\/strong\u003e Supports compatible TV-initiated power and volume synchronization\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHDMI Outputs:\u003c\/strong\u003e None\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHDMI Video Pass-Through:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePreamplifier Function:\u003c\/strong\u003e Adjustable analog output volume\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBypass Mode:\u003c\/strong\u003e Fixed-level analog output with internal volume adjustment disabled\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVolume Control:\u003c\/strong\u003e Front-panel multifunction rotary knob and infrared remote\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOp-Amp Customization:\u003c\/strong\u003e Replaceable DIP8 dual operational amplifiers\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCompatible Replacement Op-Amps:\u003c\/strong\u003e Sparkos SS3602, MUSES02, OPA2134PA, and other electrically compatible models\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDisplay:\u003c\/strong\u003e 1.5-inch OLED display\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDisplay Information:\u003c\/strong\u003e Selected input, current sampling rate, PCM\/DSD\/Bluetooth format, volume, and mute status\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDisplay On\/Off:\u003c\/strong\u003e Controlled using the included remote\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFront-Panel Controls:\u003c\/strong\u003e Multifunction power, volume, and input selection knob\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBypass Control:\u003c\/strong\u003e Dedicated switch on the underside of the unit\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRemote Control:\u003c\/strong\u003e Included infrared remote\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRemote Functions:\u003c\/strong\u003e Power, volume, mute, input selection, and display control\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRemote Batteries:\u003c\/strong\u003e 2 AAA batteries required, not included\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eComputer Compatibility:\u003c\/strong\u003e Windows 7, 8, 8.1, 10, 11; macOS; Linux\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUSB Driver Requirements:\u003c\/strong\u003e Plug-and-play on supported modern Windows and macOS systems; drivers may be required for older Windows versions, DSD, or 768kHz PCM playback\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePower Requirement:\u003c\/strong\u003e DC 12V\/1.5A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIncluded Power Adapter:\u003c\/strong\u003e 12V DC\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBuilt-In Speaker Amplification:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSpeaker-Level Outputs:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHeadphone Output:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBuilt-In Phono Preamplifier:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAnalog Audio Inputs:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eWi-Fi Connectivity:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApple AirPlay:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBuilt-In Music Streaming Services:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApp Control:\u003c\/strong\u003e No dedicated app control\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBass and Treble Controls:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSpeaker A\/B Selector:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer Warranty:\u003c\/strong\u003e 24-month limited warranty\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIncluded Accessories:\u003c\/strong\u003e Fosi Audio ZD3 DAC, 12V power adapter, infrared remote control, USB-A to USB-B cable, Bluetooth antenna, 3.5mm 12V trigger cable, and user manual\u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003eWhat It's Great At\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eHigh-Resolution Digital Audio Conversion:\u003c\/strong\u003e The ESS Sabre ES9039Q2M DAC and XMOS XU316 processor support PCM audio up to 32-bit\/768kHz and DSD512 through USB for detailed, high-fidelity music playback.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eFully Balanced Hi-Fi Connectivity:\u003c\/strong\u003e Stereo XLR outputs deliver 5Vrms at fixed level for connecting compatible balanced amplifiers and powered speakers, while RCA outputs provide convenient integration with traditional analog audio systems.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eFlexible Digital and Wireless Inputs:\u003c\/strong\u003e USB-B, HDMI ARC, optical, coaxial, and Bluetooth 5.0 connections accommodate computers, televisions, CD transports, music streamers, smartphones, and other compatible sources.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eVersatile DAC and Preamplifier Operation:\u003c\/strong\u003e Adjustable volume control allows the ZD3 to function as a stereo preamplifier, while Bypass mode provides fixed-level audio output for systems with separate volume control.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eConvenient System Integration:\u003c\/strong\u003e Dedicated 12V trigger input and output connections allow the ZD3 to synchronize power with compatible components, including the Fosi Audio ZA3 amplifier.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eCustomizable Audiophile Performance:\u003c\/strong\u003e Replaceable DIP8 operational amplifiers, a clear 1.5-inch OLED display, and an included infrared remote combine high-performance audio engineering with convenient everyday operation.\u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003eFAQ Section\u003c\/h4\u003e  \u003cp\u003e\u003cstrong\u003eQ: What is the Fosi Audio ZD3 used for?\u003c\/strong\u003e\u003cbr\u003e A: The Fosi Audio ZD3 is a fully balanced desktop digital-to-analog converter and stereo preamplifier designed for high-resolution music listening, TV audio, and home Hi-Fi systems. It converts digital audio from USB, optical, coaxial, HDMI ARC, and Bluetooth sources into analog audio for compatible powered speakers, integrated amplifiers, and dedicated power amplifiers.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: What audio inputs and outputs does the Fosi Audio ZD3 have?\u003c\/strong\u003e\u003cbr\u003e A: The ZD3 features five selectable audio input types: USB-B, HDMI ARC, optical, coaxial, and Bluetooth. It provides two stereo analog output types: balanced XLR and unbalanced RCA. It also includes separate 12V trigger input and output connections for synchronized power operation with compatible equipment.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio ZD3 support HDMI ARC?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The ZD3 features one HDMI ARC input for connecting a compatible television and playing TV audio through an external stereo amplifier or powered speakers. It also supports HDMI CEC for compatible TV-initiated power and volume control. The HDMI connection receives audio rather than functioning as a video input or video pass-through connection.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio ZD3 support Bluetooth and wireless music streaming?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The ZD3 includes Bluetooth 5.0 with SBC, AAC, aptX, and aptX HD codec support for streaming music wirelessly from compatible smartphones, tablets, and computers. However, it does not include Wi-Fi, Apple AirPlay, Spotify Connect, TIDAL Connect, or other independent network streaming services.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can the Fosi Audio ZD3 play high-resolution music?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The ZD3 features an ESS Sabre ES9039Q2M DAC and XMOS XU316 USB processor supporting PCM up to 32-bit\/768kHz and DSD512 through compatible USB connections. Optical, coaxial, and HDMI ARC inputs support PCM audio up to 24-bit\/192kHz, while Bluetooth supports audio up to 24-bit\/48kHz depending on the source and codec.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can I connect the Fosi Audio ZD3 directly to powered speakers or a power amplifier?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The ZD3 includes balanced XLR and unbalanced RCA outputs for connecting compatible powered speakers, integrated amplifiers, or dedicated power amplifiers. In preamplifier mode, you can adjust volume using the front-panel knob or included remote. In Bypass mode, the output level is fixed, so volume must be controlled by downstream equipment.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio ZD3 have a 12V trigger?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The ZD3 includes both a 12V trigger input and a 12V trigger output. The input allows compatible upstream equipment to control the ZD3's power state, while the output allows the ZD3 to control compatible downstream components such as the Fosi Audio ZA3 power amplifier. A 3.5mm trigger cable is included.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio ZD3 have a headphone amplifier or built-in speaker amplifier?\u003c\/strong\u003e\u003cbr\u003e A: No. The ZD3 is designed for digital-to-analog conversion and stereo preamplifier functions rather than directly powering headphones or passive speakers. It does not have headphone outputs or speaker-level amplification. For headphone listening, connect a compatible external headphone amplifier, or use a power amplifier or powered speakers for traditional stereo playback.\u003c\/p\u003e","brand":"Fosi Audio","offers":[{"title":"Default Title","offer_id":62887304724639,"sku":"FOS-ZD3-BLK","price":179.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0495\/6910\/4031\/files\/3e964367-5aa7-4f11-9a7b-d29886e6c0ba.jpg?v=1791572772"},{"product_id":"fosi-audio-mc351-2-1-channel-integrated-amplifier-with-dac-vu-meter","title":"Fosi Audio MC351 2.1-Channel Integrated Amplifier with DAC \u0026 VU Meter","description":"\u003ch3\u003eFosi Audio MC351 2.1-Channel Integrated Amplifier with DAC \u0026amp; VU Meter\u003c\/h3\u003e  \u003cp\u003eBring powerful sound and vintage-inspired style to your home audio system with the Fosi Audio MC351 2.1-Channel Integrated Amplifier with DAC \u0026amp; VU Meter. Combining two Texas Instruments TPA3255 Class-D amplifier chips, a built-in digital-to-analog converter, and flexible wired and wireless connectivity, the MC351 offers an all-in-one solution for music enthusiasts looking to build a compact stereo or 2.1-channel audio system. With a manufacturer-advertised maximum output of up to 165 watts per channel for passive stereo speakers and 350 watts for a passive subwoofer at 4 ohms, the MC351 delivers flexible amplification for a variety of listening setups. Bluetooth 5.3, USB, optical, coaxial, and RCA inputs make it easy to connect your favorite music sources, while a classic analog VU meter adds a distinctive retro touch.\u003c\/p\u003e  \u003cp\u003eAt the heart of the MC351 are two Texas Instruments TPA3255 amplifier chips that provide efficient Class-D amplification for left and right speakers and a dedicated passive subwoofer channel. Unlike traditional stereo amplifiers that require a separate powered subwoofer, the MC351 features speaker-level subwoofer terminals that can directly drive a compatible passive subwoofer. This makes it an appealing choice for building an integrated 2.1-channel system without adding a separate subwoofer amplifier. Its dual-PCB layout helps separate input and output circuitry to reduce unwanted interference, while dual 4700µF capacitors and an extensive 100-fin heatsink support stable operation and consistent audio performance. The MC351 supports compatible 4–8-ohm speakers and operates with a DC power supply ranging from 24V to 48V.\u003c\/p\u003e  \u003cp\u003eDesigned for everyday convenience, the Fosi Audio MC351 offers five selectable audio inputs to accommodate both modern digital and traditional analog music sources. Bluetooth 5.3 with SBC and AAC codec support allows wireless audio playback from compatible smartphones, tablets, and computers. The USB digital audio input supports PCM playback up to 24-bit\/96kHz, while optical and coaxial inputs support resolutions up to 32-bit\/192kHz. A stereo RCA input provides connectivity for compatible CD players, external DACs, music streamers, and turntables equipped with a built-in or external phono preamplifier. A dedicated 3.5mm preamplifier output also provides flexibility for connecting powered speakers, a powered subwoofer, or an additional amplifier.\u003c\/p\u003e  \u003cp\u003eOne of the MC351's most distinctive features is its circular analog VU meter, which brings the nostalgic appearance of classic Hi-Fi equipment to a modern integrated amplifier. The responsive needle follows changes in the audio signal, providing a visual representation of your music as it plays. Five front-panel input indicators make it easy to identify the selected audio source, while a dedicated MODE button allows quick switching between Bluetooth, RCA, USB, optical, and coaxial inputs. Independent bass and treble controls feature center detents for straightforward tone adjustment, making it easy to customize the sound to suit your speakers, listening room, and musical preferences.\u003c\/p\u003e  \u003cp\u003eBuilt for convenient everyday listening, the MC351 features an automatic standby function that activates after approximately two minutes without an input signal, helping reduce power consumption when the amplifier is not in use. Its compact CNC-machined aluminum alloy enclosure features a finely sandblasted finish, seamless construction, and a durable all-metal design that fits naturally into desktop audio setups, compact entertainment centers, and dedicated listening spaces. Available with 32V\/5A or 48V\/5A power supply configurations, the MC351 offers flexibility for different system requirements. Whether you're streaming music wirelessly, enjoying your CD collection, or building a compact stereo system with a passive subwoofer, the Fosi Audio MC351 combines versatile connectivity, efficient amplification, and classic Hi-Fi styling in one convenient component.\u003c\/p\u003e  \u003ch4\u003eSpecifications\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Fosi Audio\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e MC351\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e 2.1-channel integrated amplifier with DAC, Bluetooth, and VU meter\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmplifier Class:\u003c\/strong\u003e Class-D\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAudio Channels:\u003c\/strong\u003e 2.1\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSpeaker Configuration:\u003c\/strong\u003e Left and right passive stereo speakers plus one passive subwoofer\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmplifier Chips:\u003c\/strong\u003e Texas Instruments TPA3255 ×2\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBuilt-In DAC:\u003c\/strong\u003e Yes\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer-Advertised Maximum Output Power:\u003c\/strong\u003e 165W × 2 + 350W at 4 ohms\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMaximum Stereo Speaker Output Rating:\u003c\/strong\u003e 165 watts per channel at 4 ohms\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMaximum Passive Subwoofer Output Rating:\u003c\/strong\u003e 350 watts at 4 ohms\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePower Rating Note:\u003c\/strong\u003e Manufacturer maximum ratings; actual sustained and simultaneous output depends on speaker impedance, power supply, and operating conditions\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSupported Speaker Impedance:\u003c\/strong\u003e 4–8 ohms\u003c\/li\u003e 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Inputs:\u003c\/strong\u003e 5\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Input:\u003c\/strong\u003e Bluetooth 5.3\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAnalog RCA Input:\u003c\/strong\u003e 1 stereo RCA pair\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOptical Digital Input:\u003c\/strong\u003e 1 × TOSLINK\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCoaxial Digital Input:\u003c\/strong\u003e 1 × coaxial S\/PDIF\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUSB Audio Input:\u003c\/strong\u003e 1 × USB digital audio connection\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eInput Modes:\u003c\/strong\u003e Bluetooth, RCA, optical, coaxial, and USB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMaximum USB Audio Resolution:\u003c\/strong\u003e PCM up to 24-bit\/96kHz\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMaximum Optical Audio Resolution:\u003c\/strong\u003e PCM up to 32-bit\/192kHz\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMaximum Coaxial Audio Resolution:\u003c\/strong\u003e PCM up to 32-bit\/192kHz\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUSB Function:\u003c\/strong\u003e Digital audio data input; does not provide power to the amplifier\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Version:\u003c\/strong\u003e 5.3\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Audio Codecs:\u003c\/strong\u003e SBC and AAC\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Wireless Range:\u003c\/strong\u003e At least 10 meters (approximately 33 feet) in an unobstructed environment\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Antenna:\u003c\/strong\u003e External antenna connection\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTotal Audio Output Types:\u003c\/strong\u003e 3\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eStereo Speaker Outputs:\u003c\/strong\u003e 1 stereo pair of binding-post terminals\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePassive Subwoofer Output:\u003c\/strong\u003e 1 amplified speaker-level output\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePreamplifier Output:\u003c\/strong\u003e 1 × 3.5mm analog pre-out\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePre-Out Volume Control:\u003c\/strong\u003e Adjustable using the main volume control\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePre-Out Tone Control:\u003c\/strong\u003e Bass and treble controls do not affect pre-out signal\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePre-Out Compatibility:\u003c\/strong\u003e Compatible powered speakers, powered subwoofers, or external amplifiers\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePassive Subwoofer Compatibility:\u003c\/strong\u003e Supports compatible passive subwoofers through dedicated amplified terminals\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSpeaker Pairs Supported:\u003c\/strong\u003e 1 stereo pair\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSpeaker A\/B Selector:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSubwoofer Channel:\u003c\/strong\u003e Dedicated amplified mono channel\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVU Meter:\u003c\/strong\u003e 1 analog circular needle-style meter\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVU Meter Function:\u003c\/strong\u003e Displays changes in audio signal level during playback\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eInput Indicators:\u003c\/strong\u003e 5 front-panel LED indicators\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eInput Selection:\u003c\/strong\u003e Dedicated front-panel MODE button\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVolume Control:\u003c\/strong\u003e Front-panel rotary knob\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePower Control:\u003c\/strong\u003e Combined power switch and volume knob\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBass Control:\u003c\/strong\u003e Independent adjustable rotary knob\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTreble Control:\u003c\/strong\u003e Independent adjustable rotary knob\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTone Control Center Detents:\u003c\/strong\u003e Yes\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAutomatic Standby:\u003c\/strong\u003e Activates after approximately 2 minutes without an input signal\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eInput Memory:\u003c\/strong\u003e Restores the previously selected input mode after restarting\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSupported DC Input Voltage:\u003c\/strong\u003e 24–48V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eStandard Power Supply Configuration:\u003c\/strong\u003e 32V\/5A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOptional Power Supply Configuration:\u003c\/strong\u003e 48V\/5A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIncluded Power Supply:\u003c\/strong\u003e 32V\/5A DC power adapter for the default version\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eChassis Material:\u003c\/strong\u003e Aluminum alloy\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eChassis Construction:\u003c\/strong\u003e CNC-machined integrated enclosure\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eExterior Finish:\u003c\/strong\u003e Finely sandblasted metal finish\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 7.28 × 5.0 × 2.24 inches (W × D × H)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApple AirPlay:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eWi-Fi Connectivity:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBuilt-In Network Music Streaming Services:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHDMI Inputs:\u003c\/strong\u003e 0\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHDMI Outputs:\u003c\/strong\u003e 0\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e12V Trigger Input:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e12V Trigger Output:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHeadphone Output:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBuilt-In Phono Preamplifier:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRemote Control:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApp Control:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer Warranty:\u003c\/strong\u003e 24-month limited warranty\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIncluded Accessories:\u003c\/strong\u003e Fosi Audio MC351 integrated amplifier, 32V\/5A power adapter, Bluetooth antenna, and user manual (standard configuration)\u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003eWhat It's Great At\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003ePowerful 2.1-Channel Amplification:\u003c\/strong\u003e Two Texas Instruments TPA3255 Class-D amplifier chips provide dedicated amplification for passive stereo speakers and a compatible passive subwoofer, with manufacturer-advertised maximum output ratings of 165W × 2 + 350W at 4 ohms.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eVersatile Wired and Wireless Connectivity:\u003c\/strong\u003e Bluetooth 5.3, USB, optical, coaxial, and stereo RCA inputs allow easy integration with compatible smartphones, computers, CD players, DACs, and other audio sources.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eBuilt-In High-Resolution DAC:\u003c\/strong\u003e Digital audio playback supports PCM up to 24-bit\/96kHz through USB and up to 32-bit\/192kHz through optical and coaxial inputs, making it convenient to enjoy digital music without a separate converter.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eDedicated Passive Subwoofer Amplification:\u003c\/strong\u003e An independent speaker-level subwoofer output allows direct connection to a compatible passive subwoofer, eliminating the need for a separate powered subwoofer amplifier in many 2.1-channel systems.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eClassic Analog VU Meter and Customizable Sound:\u003c\/strong\u003e A responsive circular VU meter, five input indicators, and independent bass and treble controls combine vintage-inspired styling with convenient sound adjustments.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003ePremium Construction and Efficient Operation:\u003c\/strong\u003e A CNC-machined aluminum enclosure, dual 4700µF capacitors, 100-fin heatsink, and automatic standby after approximately two minutes of inactivity support reliable everyday performance.\u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003eFAQ Section\u003c\/h4\u003e  \u003cp\u003e\u003cstrong\u003eQ: What is the Fosi Audio MC351 Integrated Amplifier?\u003c\/strong\u003e\u003cbr\u003e A: The Fosi Audio MC351 is a 2.1-channel integrated amplifier with a built-in DAC, Bluetooth 5.3, and analog VU meter. It is designed to power two passive stereo speakers and one compatible passive subwoofer while providing USB, optical, coaxial, RCA, and Bluetooth audio inputs for a variety of digital and analog music sources.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: How much power does the Fosi Audio MC351 deliver?\u003c\/strong\u003e\u003cbr\u003e A: Fosi Audio advertises maximum output ratings of 165 watts per channel for the stereo speakers and 350 watts for the passive subwoofer channel at 4 ohms. The amplifier supports 24–48V DC power supplies, with 32V\/5A and 48V\/5A configurations available. Actual output depends on the power supply, speaker impedance, and operating conditions, and the maximum ratings should not be interpreted as continuous simultaneous RMS output with the standard 32V\/5A supply.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can I connect a passive subwoofer to the Fosi Audio MC351?\u003c\/strong\u003e\u003cbr\u003e A: Yes. Unlike many integrated amplifiers that only provide a line-level output for a powered subwoofer, the MC351 includes a dedicated amplified subwoofer channel with speaker-level binding posts. This allows it to directly drive a compatible passive subwoofer without requiring a separate subwoofer amplifier.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: What audio inputs does the Fosi Audio MC351 have?\u003c\/strong\u003e\u003cbr\u003e A: The MC351 includes five selectable input types: Bluetooth 5.3, USB digital audio, optical digital, coaxial digital, and stereo RCA analog. The front-panel MODE button allows you to switch between sources, while five LED indicators identify the currently selected input.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio MC351 support Bluetooth music streaming?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The MC351 features Bluetooth 5.3 with SBC and AAC codec support for wireless music playback from compatible smartphones, tablets, and computers. However, it does not include Wi-Fi, Apple AirPlay, Spotify Connect, TIDAL Connect, or other built-in network music streaming services.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can I connect a powered subwoofer or an additional amplifier to the Fosi Audio MC351?\u003c\/strong\u003e\u003cbr\u003e A: Yes. In addition to its dedicated amplified passive subwoofer output, the MC351 includes a 3.5mm analog preamplifier output for compatible powered speakers, powered subwoofers, or external amplifiers. The pre-out level follows the main volume control but is not affected by the MC351's bass and treble adjustments.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio MC351 include a DAC and support high-resolution audio?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The MC351 features an integrated digital-to-analog converter supporting PCM playback up to 24-bit\/96kHz through its USB input and up to 32-bit\/192kHz through its optical and coaxial inputs. This allows compatible computers, digital music sources, and CD transports to connect directly without requiring a separate external DAC.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio MC351 have a remote control, 12V trigger, or HDMI connection?\u003c\/strong\u003e\u003cbr\u003e A: No. The MC351 does not include an infrared remote, dedicated 12V trigger input or output, or HDMI connectivity. Input switching, volume adjustment, and bass and treble settings are controlled directly through the front-panel controls. The amplifier also includes an automatic standby feature that activates after approximately two minutes without an input signal.\u003c\/p\u003e","brand":"Fosi Audio","offers":[{"title":"Default Title","offer_id":62887305969823,"sku":"FOS-MC351-32-BLK","price":189.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0495\/6910\/4031\/files\/f44a4db9-552f-48cf-981e-ff4a6f1d6d32.jpg?v=1791573545"},{"product_id":"fosi-audio-gr70-class-a-tube-headphone-amplifier-preamplifier","title":"Fosi Audio GR70 Class-A Tube Headphone Amplifier \u0026 Preamplifier","description":"\u003ch3\u003eFosi Audio GR70 Class-A Tube Headphone Amplifier \u0026amp; Preamplifier – Orange\u003c\/h3\u003e  \u003cp\u003eExperience the warmth and character of traditional tube audio with the Fosi Audio GR70 Class-A Tube Headphone Amplifier \u0026amp; Preamplifier. Designed for music enthusiasts who appreciate detailed sound and vintage-inspired Hi-Fi equipment, the GR70 features a pure vacuum-tube amplification circuit with four replaceable tubes, adjustable headphone impedance modes, and independent bass and treble controls. Delivering up to 300mW of maximum headphone output power into 32 ohms, the GR70 provides a versatile solution for enjoying music through compatible headphones or integrating tube amplification into an existing stereo system. Its premium CNC-machined aluminum enclosure, elegant orange-accented controls, and exposed vacuum tubes create a distinctive desktop listening experience.\u003c\/p\u003e  \u003cp\u003eAt the heart of the GR70 is a dual-stage Class-A vacuum-tube amplification architecture featuring two 5654W tubes for voltage amplification and two 6Ж4\/6Ж8 tubes for power amplification. This four-tube configuration brings the rich harmonic character and smooth musical presentation associated with traditional tube audio to a compact modern component. The replaceable tubes also provide opportunities for personalization, allowing enthusiasts to experiment with electrically compatible replacements to explore different sonic characteristics. With a carefully engineered analog signal path, the GR70 is designed to deliver natural vocals, engaging instrument reproduction, and an immersive listening experience across a wide variety of musical genres.\u003c\/p\u003e  \u003cp\u003eDesigned to accommodate a broad selection of headphones, the Fosi Audio GR70 features both 3.5mm and 6.35mm single-ended headphone outputs, making it easy to connect compatible in-ear monitors and full-size headphones without relying on a separate adapter. A convenient front-panel impedance selector provides two operating modes: Low for headphones rated from 16 to 120 ohms and High for models rated from 120 to 300 ohms. This flexibility allows the GR70 to accommodate headphones with different impedance requirements, while its large top-mounted volume control offers precise, convenient listening adjustments. Independent bass and treble controls provide additional flexibility for tailoring the sound to your headphones, music, and personal listening preferences.\u003c\/p\u003e  \u003cp\u003eIn addition to its headphone amplification capabilities, the GR70 functions as a dedicated stereo tube preamplifier. A rear-panel stereo RCA input allows connection to compatible analog audio sources, including external DACs, CD players, music streamers, and turntables equipped with a built-in or external phono preamplifier. A separate stereo RCA output sends the processed analog signal to compatible powered speakers, integrated amplifiers, or dedicated power amplifiers, bringing the GR70's vacuum-tube character into a larger Hi-Fi system. The preamplifier output delivers up to 1.2V, and the independent bass and treble controls remain active during both headphone and preamplifier operation.\u003c\/p\u003e  \u003cp\u003eThe GR70 combines thoughtful construction with a simple, intuitive interface. Its CNC-machined aluminum alloy chassis features dual-side ventilation openings to help manage heat, while exposed tubes and subtle ambient illumination contribute to its classic aesthetic. The large top-mounted volume knob doubles as the power control, providing a streamlined layout that keeps operation straightforward. With a manufacturer-rated signal-to-noise ratio of at least 97dB and a frequency response of 20Hz to 20kHz, the GR70 delivers capable analog performance in a compact desktop design. The included 12V\/3A power adapter, vacuum tubes, and tube protection covers provide the essential components needed to begin enjoying a dedicated tube listening setup.\u003c\/p\u003e  \u003cp\u003eWhether you're looking to add the distinctive character of vacuum tubes to your headphone listening experience or introduce a tube preamplifier into an existing Hi-Fi system, the Fosi Audio GR70 offers an appealing combination of traditional audio design, versatile connectivity, and convenient everyday control. Its replaceable vacuum tubes, adjustable impedance modes, dual headphone connections, and stereo RCA preamplifier output make it a compelling choice for listeners seeking a more personalized approach to high-fidelity music reproduction.\u003c\/p\u003e  \u003ch4\u003eSpecifications\u003c\/h4\u003e \u003cul\u003e   \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Fosi Audio\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e GR70\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eVersion:\u003c\/strong\u003e Orange-accented\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Vacuum tube headphone amplifier and stereo preamplifier\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eAmplification Class:\u003c\/strong\u003e Class-A\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eAmplifier Architecture:\u003c\/strong\u003e Pure vacuum tube amplification\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eAudio Channels:\u003c\/strong\u003e 2-channel stereo\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eTotal Vacuum Tubes:\u003c\/strong\u003e 4\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eVoltage Amplification Tubes:\u003c\/strong\u003e 2 × 5654W\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003ePower Amplification Tubes:\u003c\/strong\u003e 2 × 6Ж4\/6Ж8\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eTube Configuration:\u003c\/strong\u003e Dual-stage vacuum tube amplification\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eTube Replacement:\u003c\/strong\u003e User-replaceable with electrically compatible vacuum tubes\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eHeadphone Output Power:\u003c\/strong\u003e 90mW rated at 32 ohms\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eMaximum Headphone Output Power:\u003c\/strong\u003e 300mW at 32 ohms\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eSupported Headphone Impedance:\u003c\/strong\u003e 16–300 ohms\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eLow-Impedance Mode:\u003c\/strong\u003e 16–120 ohms\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eHigh-Impedance Mode:\u003c\/strong\u003e 120–300 ohms\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eHeadphone Impedance Selection:\u003c\/strong\u003e Front-panel High\/Low switch\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eTotal Audio Input Types:\u003c\/strong\u003e 1\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eAnalog Audio Input:\u003c\/strong\u003e 1 × stereo RCA pair\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eInput Signal Type:\u003c\/strong\u003e Analog line-level audio\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eTotal Audio Output Types:\u003c\/strong\u003e 3\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003e3.5mm Headphone Output:\u003c\/strong\u003e 1 × single-ended stereo headphone jack\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003e6.35mm Headphone Output:\u003c\/strong\u003e 1 × single-ended stereo headphone jack\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eAnalog Preamplifier Output:\u003c\/strong\u003e 1 × stereo RCA pair\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eRCA Output Level:\u003c\/strong\u003e Up to 1.2V\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eRCA Output Function:\u003c\/strong\u003e Stereo analog output for compatible powered speakers or amplifiers\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e 20Hz–20kHz (±1dB)\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eSignal-to-Noise Ratio:\u003c\/strong\u003e At least 97dB\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eDynamic Range:\u003c\/strong\u003e At least 97dB\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eRCA Output THD+N:\u003c\/strong\u003e 0.26% or less\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eHeadphone Output THD+N:\u003c\/strong\u003e 0.5% or less\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eRCA Output Noise:\u003c\/strong\u003e 20µV or less\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eHeadphone Output Noise:\u003c\/strong\u003e 56µV\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eRCA Output Crosstalk:\u003c\/strong\u003e -63dB\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eHeadphone Output Crosstalk:\u003c\/strong\u003e -65dB\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eBass Control:\u003c\/strong\u003e Independent front-panel rotary adjustment\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eTreble Control:\u003c\/strong\u003e Independent front-panel rotary adjustment\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eTone Control Compatibility:\u003c\/strong\u003e Applies to both headphone and RCA preamplifier outputs\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eVolume Control:\u003c\/strong\u003e Large top-mounted rotary potentiometer\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003ePower Control:\u003c\/strong\u003e Integrated with volume knob\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eVacuum Tube Warm-Up:\u003c\/strong\u003e Allow at least 20 seconds before playback\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eSimultaneous Output Support:\u003c\/strong\u003e Headphone and RCA outputs can operate simultaneously; individual output use is recommended\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eChassis Material:\u003c\/strong\u003e CNC-machined aluminum alloy\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eExterior Styling:\u003c\/strong\u003e Dark metal chassis with orange-accented controls\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eCooling:\u003c\/strong\u003e Passive cooling with dual-side ventilation openings\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eVacuum Tube Protection:\u003c\/strong\u003e Includes 2 tube protection covers\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eAmbient Illumination:\u003c\/strong\u003e Decorative tube-area lighting\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003ePower Input:\u003c\/strong\u003e DC 12V\/3A\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eIncluded Power Supply:\u003c\/strong\u003e 12V\/3A external adapter\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eBuilt-In DAC:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eUSB Audio Input:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eOptical Digital Input:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eCoaxial Digital Input:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eHDMI Inputs:\u003c\/strong\u003e 0\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eHDMI Outputs:\u003c\/strong\u003e 0\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eBluetooth:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eWi-Fi:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eApple AirPlay:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eBuilt-In Music Streaming:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eApp Control:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eRemote Control:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eBuilt-In Phono Preamplifier:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003ePassive Speaker Amplification:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eSpeaker Binding Posts:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eSpeaker A\/B Selector:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003e12V Trigger Input:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003e12V Trigger Output:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eEAN:\u003c\/strong\u003e 6976136960904\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eManufacturer Warranty:\u003c\/strong\u003e 24-month limited warranty\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eIncluded Accessories:\u003c\/strong\u003e Fosi Audio GR70 headphone amplifier\/preamplifier, 2 × 5654W vacuum tubes, 2 × 6Ж4\/6Ж8 vacuum tubes, 2 tube protection covers, 12V\/3A power adapter, and user manual\u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003eWhat It's Great At\u003c\/h4\u003e \u003cul\u003e   \u003cli\u003e\n\u003cstrong\u003eAuthentic Class-A Tube Amplification:\u003c\/strong\u003e A dual-stage amplification design featuring four replaceable vacuum tubes delivers the distinctive harmonic character and smooth musical presentation associated with traditional tube audio.\u003c\/li\u003e    \u003cli\u003e\n\u003cstrong\u003eVersatile Headphone Compatibility:\u003c\/strong\u003e Adjustable Low and High impedance modes accommodate compatible headphones rated from 16 to 300 ohms, with both 3.5mm and 6.35mm headphone outputs for convenient connectivity.\u003c\/li\u003e    \u003cli\u003e\n\u003cstrong\u003eIntegrated Stereo Tube Preamplifier:\u003c\/strong\u003e A dedicated stereo RCA input and output allow the GR70 to serve as a tube preamplifier for compatible powered speakers, integrated amplifiers, and dedicated power amplifiers.\u003c\/li\u003e    \u003cli\u003e\n\u003cstrong\u003ePersonalized Sound Adjustments:\u003c\/strong\u003e Independent bass and treble controls make it easy to fine-tune music playback, with adjustments available for both headphone and preamplifier operation.\u003c\/li\u003e    \u003cli\u003e\n\u003cstrong\u003eCustomizable Vacuum Tube Design:\u003c\/strong\u003e Two 5654W voltage amplification tubes and two 6Ж4\/6Ж8 power amplification tubes can be replaced with electrically compatible alternatives for additional personalization.\u003c\/li\u003e    \u003cli\u003e\n\u003cstrong\u003ePremium Desktop Construction:\u003c\/strong\u003e A CNC-machined aluminum alloy enclosure, orange-accented controls, exposed vacuum tubes, and dual-side ventilation combine classic Hi-Fi styling with practical heat management.\u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003eFAQ Section\u003c\/h4\u003e  \u003cp\u003e\u003cstrong\u003eQ: What is the Fosi Audio GR70 used for?\u003c\/strong\u003e\u003cbr\u003e A: The Fosi Audio GR70 is a Class-A vacuum tube headphone amplifier and stereo preamplifier. It amplifies analog audio for compatible wired headphones and can also send a tube-processed audio signal through its RCA outputs to powered speakers or an external amplifier. It does not contain a built-in DAC or speaker power amplifier.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: How much headphone power does the Fosi Audio GR70 deliver?\u003c\/strong\u003e\u003cbr\u003e A: Fosi Audio specifies 90mW of rated headphone output power into 32 ohms, with a maximum output of 300mW into 32 ohms. Actual output varies with the headphones being used and the selected impedance mode.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: What headphones are compatible with the Fosi Audio GR70?\u003c\/strong\u003e\u003cbr\u003e A: The GR70 supports compatible headphones with impedances ranging from 16 to 300 ohms. Its Low mode is designed for 16–120-ohm headphones, while High mode accommodates models rated from 120 to 300 ohms. Both 3.5mm and 6.35mm single-ended headphone connections are available.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can I use the Fosi Audio GR70 as a stereo preamplifier?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The GR70 features a stereo RCA input and stereo RCA output, allowing you to connect an analog audio source and send the processed signal to compatible powered speakers or a separate amplifier. Its tone controls also operate when using the RCA preamplifier output.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio GR70 support Bluetooth, Wi-Fi, or music streaming?\u003c\/strong\u003e\u003cbr\u003e A: No. The GR70 is a dedicated analog headphone amplifier and preamplifier without built-in Bluetooth, Wi-Fi, Apple AirPlay, or network streaming services. To enjoy wireless or digital music, connect a compatible external DAC, Bluetooth receiver, or music streamer with analog RCA outputs.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can I adjust the bass and treble on the Fosi Audio GR70?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The GR70 includes independent bass and treble controls on its front panel, allowing you to customize the tonal balance of your music. These adjustments operate during both headphone listening and RCA preamplifier playback.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can I replace the vacuum tubes in the Fosi Audio GR70?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The GR70 includes four replaceable vacuum tubes: two 5654W tubes for voltage amplification and two 6Ж4\/6Ж8 tubes for power amplification. Replacements must be electrically compatible with the specific tube positions. Always disconnect power and allow the tubes to cool completely before removing or installing them.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can the Fosi Audio GR70 play through headphones and powered speakers simultaneously?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The GR70 supports simultaneous audio output through its headphone connections and stereo RCA preamplifier output. However, Fosi Audio recommends using one output at a time for the best listening experience. The unit requires approximately 20 seconds of tube warm-up after powering on before playback begins.\u003c\/p\u003e","brand":"Fosi Audio","offers":[{"title":"Default Title","offer_id":62887306199199,"sku":"FOS-GR70-BLK","price":199.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0495\/6910\/4031\/files\/7f58d307-b6b5-4cba-8a5b-cda4ee020096.jpg?v=1791573892"},{"product_id":"fosi-audio-gr40-tube-dac-headphone-amplifier-preamplifier","title":"Fosi Audio GR40 Tube DAC, Headphone Amplifier \u0026 Preamplifier","description":"\u003ch3\u003eFosi Audio GR40 Tube DAC, Headphone Amplifier \u0026amp; Preamplifier\u003c\/h3\u003e  \u003cp\u003eBring the character of vacuum tube audio and modern digital connectivity to your listening space with the Fosi Audio GR40 Tube DAC, Headphone Amplifier \u0026amp; Preamplifier. Combining an ESS ES9028Q2M digital-to-analog converter, two replaceable 5654W vacuum tubes, and a dedicated headphone amplifier, the GR40 offers a versatile solution for high-resolution music playback and personal listening. With Bluetooth 5.1, USB-C, optical, and coaxial digital inputs, along with stereo RCA and 3.5mm headphone outputs, the GR40 brings modern convenience and classic Hi-Fi styling together in one compact desktop component.\u003c\/p\u003e  \u003cp\u003eAt the heart of the Fosi Audio GR40 is the ESS ES9028Q2M DAC, designed to deliver detailed and accurate digital-to-analog conversion for your favorite music. Through its USB connection, the GR40 supports PCM audio up to 32-bit\/384kHz and DSD256, providing compatibility with high-resolution music files and playback software. Optical and coaxial digital inputs offer additional connectivity for compatible CD transports, televisions, and other digital audio sources. The GR40's tube preamplifier stage uses two 5654W vacuum tubes to introduce the rich harmonic character associated with traditional tube audio, creating an engaging listening experience that combines modern digital precision with vintage-inspired sound.\u003c\/p\u003e  \u003cp\u003eWireless music playback is equally convenient with Bluetooth 5.1 connectivity, powered by a Qualcomm QCC3031 Bluetooth chip. Supporting SBC, AAC, aptX, aptX HD, and aptX Low Latency codecs, the GR40 allows you to stream music wirelessly from compatible smartphones, tablets, and computers. aptX HD provides enhanced Bluetooth audio quality when paired with compatible devices, while aptX Low Latency helps reduce audio delay when watching movies or videos. An included external Bluetooth antenna supports a reliable wireless connection, while front-panel input indicators make it easy to identify and switch between Bluetooth, USB, optical, and coaxial sources.\u003c\/p\u003e  \u003cp\u003eFor dedicated headphone listening, the Fosi Audio GR40 includes a 3.5mm stereo headphone output designed for compatible headphones with impedances ranging from 32 to 300 ohms. The integrated headphone amplifier delivers up to 250mW into 32 ohms and 40mW into 300 ohms, offering flexible performance for a range of wired headphones. A headphone-priority system automatically mutes the rear RCA output whenever headphones are connected, making it easy to transition between private listening and speaker playback without manually switching outputs.\u003c\/p\u003e  \u003cp\u003eBeyond its headphone capabilities, the GR40 functions as a stereo tube preamplifier with a dedicated pair of RCA analog outputs. Connect the GR40 to compatible powered speakers, an integrated amplifier, or a dedicated power amplifier to bring its DAC and vacuum tube preamplification into a larger stereo system. Independent bass and treble controls provide additional sound customization, allowing you to adjust tonal balance to suit different recordings, connected equipment, and personal preferences. A multifunction volume knob also serves as the power and input-selection control, providing convenient operation without a complicated interface.\u003c\/p\u003e  \u003cp\u003eDesigned for both performance and visual appeal, the GR40 features a compact metal enclosure, two exposed vacuum tubes, and decorative tube rings that bring classic Hi-Fi character to modern desktop audio systems. The tubes can be replaced with compatible alternatives, giving enthusiasts the opportunity to experiment with different tube characteristics. An external 12V power adapter supplies the GR40, while its USB-C connection is dedicated to digital audio data rather than power delivery. Whether you're exploring high-resolution music files, streaming wirelessly from your phone, or building a dedicated headphone listening setup, the Fosi Audio GR40 delivers an appealing combination of digital audio performance, tube preamplification, and everyday versatility.\u003c\/p\u003e  \u003ch4\u003eSpecifications\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Fosi Audio\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e GR40\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Tube DAC, stereo preamplifier, and headphone amplifier\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAudio Channels:\u003c\/strong\u003e 2-channel stereo\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmplifier Design:\u003c\/strong\u003e Hybrid digital audio conversion and vacuum tube preamplification\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDAC Chip:\u003c\/strong\u003e ESS ES9028Q2M\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Chip:\u003c\/strong\u003e Qualcomm QCC3031\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVacuum Tubes:\u003c\/strong\u003e 2 × 5654W\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTube Configuration:\u003c\/strong\u003e Replaceable vacuum tubes\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCompatible Replacement Tube Types:\u003c\/strong\u003e EF95, 6AK5, 6AK5W, 403A\/403B, 6J1, 6J1P, and other electrically compatible alternatives\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBuilt-In DAC:\u003c\/strong\u003e Yes\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBuilt-In Headphone Amplifier:\u003c\/strong\u003e Yes\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBuilt-In Stereo Preamplifier:\u003c\/strong\u003e Yes\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTotal Audio Input Types:\u003c\/strong\u003e 4\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUSB Audio Input:\u003c\/strong\u003e 1 × USB-C\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOptical Digital Input:\u003c\/strong\u003e 1 × TOSLINK\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCoaxial Digital Input:\u003c\/strong\u003e 1 × coaxial S\/PDIF\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eWireless Audio Input:\u003c\/strong\u003e Bluetooth 5.1\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSelectable Input Modes:\u003c\/strong\u003e Bluetooth, USB, optical, and coaxial\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMaximum USB PCM Resolution:\u003c\/strong\u003e 32-bit\/384kHz\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMaximum USB DSD Resolution:\u003c\/strong\u003e DSD256\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUSB Function:\u003c\/strong\u003e Digital audio data connection only; does not power the GR40\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Version:\u003c\/strong\u003e 5.1\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Audio Codecs:\u003c\/strong\u003e SBC, AAC, aptX, aptX HD, and aptX Low Latency\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Wireless Range:\u003c\/strong\u003e At least 10 meters under suitable conditions\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Antenna:\u003c\/strong\u003e External antenna, included\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Pairing Reset:\u003c\/strong\u003e Dedicated rear-panel reset button\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTotal Audio Output Types:\u003c\/strong\u003e 2\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHeadphone Output:\u003c\/strong\u003e 1 × 3.5mm stereo headphone jack\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAnalog Preamplifier Output:\u003c\/strong\u003e 1 × stereo RCA pair\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHeadphone Impedance Compatibility:\u003c\/strong\u003e 32–300 ohms\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHeadphone Output Power at 16 Ohms:\u003c\/strong\u003e 300mW\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHeadphone Output Power at 32 Ohms:\u003c\/strong\u003e 250mW\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHeadphone Output Power at 250 Ohms:\u003c\/strong\u003e 50mW\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHeadphone Output Power at 300 Ohms:\u003c\/strong\u003e 40mW\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHeadphone Priority:\u003c\/strong\u003e Yes; RCA output is muted when headphones are connected\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSignal-to-Noise Ratio:\u003c\/strong\u003e At least 103dB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDynamic Range:\u003c\/strong\u003e 104dB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e 20Hz–20kHz (±1dB)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBass Control:\u003c\/strong\u003e Independent front-panel rotary control\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTreble Control:\u003c\/strong\u003e Independent front-panel rotary control\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVolume Control:\u003c\/strong\u003e Multifunction front-panel rotary knob\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePower Control:\u003c\/strong\u003e Press-and-hold multifunction knob\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eInput Selection:\u003c\/strong\u003e Front-panel multifunction knob\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eInput Indicators:\u003c\/strong\u003e Front-panel LED indicators\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDSD Indicator:\u003c\/strong\u003e Dedicated front-panel indicator\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTube Warm-Up:\u003c\/strong\u003e Approximately 15 seconds recommended before playback\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePower Requirement:\u003c\/strong\u003e DC 12V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIncluded Power Adapter:\u003c\/strong\u003e 12V DC power supply\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eEnclosure:\u003c\/strong\u003e Compact metal chassis with exposed vacuum tubes\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTube Accessories:\u003c\/strong\u003e Decorative rings for both vacuum tubes\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCompatible Speaker Systems:\u003c\/strong\u003e Powered speakers or passive speakers driven by an external amplifier\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBuilt-In Speaker Amplification:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSpeaker-Level Outputs:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eStereo Speaker Pairs Powered Directly:\u003c\/strong\u003e 0\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAnalog RCA Inputs:\u003c\/strong\u003e 0\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePhono Input:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBalanced XLR Input:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBalanced Headphone Output:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e6.35mm Headphone Output:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eWi-Fi Connectivity:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApple AirPlay:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBuilt-In Network Music Streaming:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHDMI Inputs:\u003c\/strong\u003e 0\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHDMI Outputs:\u003c\/strong\u003e 0\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e12V Trigger Input:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e12V Trigger Output:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRemote Control:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApp Control:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer Warranty:\u003c\/strong\u003e 24-month limited warranty\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIncluded Accessories:\u003c\/strong\u003e Fosi Audio GR40, 2 × 5654W vacuum tubes, 2 × decorative tube rings, 12V power adapter, Bluetooth antenna, and user manual\u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003eWhat It's Great At\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eHigh-Resolution Digital Audio Conversion:\u003c\/strong\u003e The ESS ES9028Q2M DAC supports PCM up to 32-bit\/384kHz and DSD256 through USB, making it an excellent foundation for enjoying high-resolution music files.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eClassic Vacuum Tube Sound:\u003c\/strong\u003e Two replaceable 5654W tubes bring the distinctive harmonic character of tube preamplification to headphone listening and compatible stereo audio systems.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eVersatile Digital and Wireless Connectivity:\u003c\/strong\u003e Bluetooth 5.1, USB-C, optical, and coaxial inputs accommodate computers, smartphones, CD transports, televisions, and other compatible digital music sources.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eDedicated Headphone Amplification:\u003c\/strong\u003e A 3.5mm headphone output delivers up to 250mW into 32 ohms and supports compatible headphones from 32 to 300 ohms, with headphone-priority switching for convenient private listening.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eStereo Tube Preamplifier Functionality:\u003c\/strong\u003e A dedicated stereo RCA output allows the GR40 to connect to powered speakers or external amplifiers, bringing its DAC and vacuum tube sound character into a larger Hi-Fi system.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eCustomizable Sound and Tube Design:\u003c\/strong\u003e Independent bass and treble controls, user-replaceable vacuum tubes, and convenient front-panel operation make it easy to personalize your listening experience.\u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003eFAQ Section\u003c\/h4\u003e  \u003cp\u003e\u003cstrong\u003eQ: What is the Fosi Audio GR40 used for?\u003c\/strong\u003e\u003cbr\u003e A: The Fosi Audio GR40 is a combined digital-to-analog converter, vacuum tube stereo preamplifier, and headphone amplifier. It converts digital audio from Bluetooth, USB, optical, and coaxial sources into analog sound for compatible wired headphones or a stereo system connected through its RCA outputs.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: What audio inputs and outputs does the Fosi Audio GR40 have?\u003c\/strong\u003e\u003cbr\u003e A: The GR40 features four selectable audio input types: Bluetooth 5.1, USB-C, optical digital, and coaxial digital. It offers two analog output types: one 3.5mm stereo headphone output and one stereo RCA preamplifier output. It does not include analog RCA inputs, balanced XLR connections, or speaker-level outputs.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio GR40 support Bluetooth music streaming?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The GR40 features Bluetooth 5.1 with SBC, AAC, aptX, aptX HD, and aptX Low Latency codec support. This allows wireless music playback from compatible smartphones, tablets, and computers, while aptX Low Latency can help reduce audio delay when used with a compatible transmitting device. The GR40 does not include Wi-Fi or independent network streaming services.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can the Fosi Audio GR40 play high-resolution audio?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The GR40 includes an ESS ES9028Q2M DAC supporting PCM audio up to 32-bit\/384kHz and DSD256 through its USB input. Actual playback resolution depends on the connected source, connection type, software, and audio format.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: How much headphone power does the Fosi Audio GR40 deliver?\u003c\/strong\u003e\u003cbr\u003e A: The GR40 delivers 250mW into 32 ohms, 50mW into 250 ohms, and 40mW into 300 ohms, with a published measurement of 300mW at 16 ohms. Fosi Audio specifies a recommended headphone impedance range of 32 to 300 ohms, making it suitable for a variety of compatible headphones.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can I use the Fosi Audio GR40 as a tube preamplifier?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The GR40 features stereo RCA preamplifier outputs for connection to compatible powered speakers, integrated amplifiers, or dedicated power amplifiers. This allows you to use its DAC and vacuum tube preamplifier stage as part of a larger Hi-Fi system. It cannot directly power passive speakers.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can headphones and RCA outputs play simultaneously?\u003c\/strong\u003e\u003cbr\u003e A: No. The GR40 uses headphone-priority output switching, meaning the rear stereo RCA outputs are automatically muted when headphones are connected. To resume playback through connected speakers or an external amplifier, disconnect the headphones from the front-panel jack.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can I replace the vacuum tubes in the Fosi Audio GR40?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The GR40 includes two replaceable 5654W vacuum tubes. Electrically compatible replacement models include EF95, 6AK5, 6AK5W, 403A\/403B, and selected 6J-series tubes. Always power off the unit, disconnect its power supply, and allow the tubes to cool completely before replacing them.\u003c\/p\u003e","brand":"Fosi Audio","offers":[{"title":"Default Title","offer_id":62887307837599,"sku":"FOS-GR40-BLK","price":119.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0495\/6910\/4031\/files\/e79a8e65-e147-497e-9c5e-d859066f02be.jpg?v=1791574389"},{"product_id":"fosi-audio-box-x5-mm-mc-phono-preamplifier-with-4-level-gain-adjustment","title":"Fosi Audio BOX X5 MM\/MC Phono Preamplifier with 4-Level Gain Adjustment","description":"\u003ch3\u003eFosi Audio BOX X5 MM\/MC Phono Preamplifier with 4-Level Gain Adjustment\u003c\/h3\u003e  \u003cp\u003eBring greater clarity, detail, and musical depth to your vinyl collection with the Fosi Audio BOX X5 MM\/MC Phono Preamplifier. Designed for turntable enthusiasts looking to upgrade their analog audio system, the BOX X5 combines precision RIAA equalization, four selectable gain settings, and compatibility with both moving magnet (MM) and moving coil (MC) cartridges in a compact, all-aluminum enclosure. Featuring premium audio components, low-noise circuitry, and gold-plated RCA connections, the BOX X5 provides the essential signal amplification and equalization needed to enjoy vinyl records through compatible stereo amplifiers and powered speakers.\u003c\/p\u003e  \u003cp\u003eAt the heart of the BOX X5 is a carefully engineered phono amplification circuit designed to preserve the subtle details captured in your favorite records. Its Texas Instruments OPA1612 operational amplifier works alongside 2% precision polyester film capacitors, 0.1% high-precision film resistors, and specialized copper-lead audio capacitors to minimize unwanted noise and signal distortion. Precise RIAA equalization restores the tonal balance of vinyl recordings, helping deliver accurate bass, natural midrange reproduction, and clear high-frequency detail. With a manufacturer-rated signal-to-noise ratio of at least 92dB and total harmonic distortion of 0.009% or less under specified test conditions, the BOX X5 provides a clean and reliable foundation for dedicated analog listening.\u003c\/p\u003e  \u003cp\u003eOne of the BOX X5's most versatile features is its adjustable gain system, which provides four selectable amplification levels of 38dB, 48dB, 56dB, and 66dB. This allows the phono stage to accommodate a wide range of cartridges with different output levels, from higher-output moving magnet models to lower-output moving coil designs. A dedicated MM\/MC impedance switch provides the appropriate input loading options, with 47kΩ for MM cartridges and 100Ω for MC cartridges. These controls make it easy to tailor the phono stage to compatible cartridges without replacing your entire turntable or audio system.\u003c\/p\u003e  \u003cp\u003eConnecting the Fosi Audio BOX X5 to your Hi-Fi system is straightforward. A stereo RCA input accepts the low-level phono signal from your turntable, while a separate stereo RCA output sends the equalized and amplified signal to a compatible line-level input on an integrated amplifier, preamplifier, or powered speaker system. A dedicated grounding terminal provides a convenient connection for the turntable's ground wire, helping minimize unwanted hum and interference. Its compact design also pairs naturally with other Fosi Audio components, including the V3 and ZA3 amplifiers, making it an excellent addition to a space-conscious vinyl listening setup.\u003c\/p\u003e  \u003cp\u003eThe BOX X5 is built around a durable aluminum alloy chassis that helps shield its sensitive phono circuitry from electromagnetic interference. Its minimalist design features a convenient front-panel power button and indicator light, while the rear panel provides access to the RCA connections, adjustable gain selector, cartridge impedance switch, and grounding terminal. Powered by an included 16V AC adapter, the BOX X5 offers straightforward installation without complicated setup menus or additional digital components. Whether you're adding phono capability to an amplifier without a dedicated turntable input or upgrading from a basic built-in phono stage, the Fosi Audio BOX X5 delivers versatile cartridge support, precision analog circuitry, and high-fidelity performance in one compact component.\u003c\/p\u003e  \u003ch4\u003eSpecifications\u003c\/h4\u003e \u003cul\u003e   \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Fosi Audio\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e BOX X5\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e MM\/MC phono preamplifier\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eAudio Channels:\u003c\/strong\u003e 2-channel stereo\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eSupported Cartridge Types:\u003c\/strong\u003e Moving Magnet (MM) and Moving Coil (MC)\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003ePhono Equalization:\u003c\/strong\u003e RIAA equalization\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eAmplification Circuit:\u003c\/strong\u003e Low-noise analog phono preamplifier\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eOperational Amplifier:\u003c\/strong\u003e Texas Instruments OPA1612\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eCapacitors:\u003c\/strong\u003e 2% precision polyester film capacitors and copper-lead audio capacitors\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eResistors:\u003c\/strong\u003e 0.1% high-precision film resistors\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eRCA Connections:\u003c\/strong\u003e Gold-plated RCA jacks\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eAvailable Gain Settings:\u003c\/strong\u003e 38dB, 48dB, 56dB, and 66dB\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003e38dB Gain:\u003c\/strong\u003e Recommended for phono signals above 2mV\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003e48dB Gain:\u003c\/strong\u003e Recommended for phono signals around 2mV or lower\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003e56dB Gain:\u003c\/strong\u003e Recommended for low-output phono signals around 0.5mV or lower\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003e66dB Gain:\u003c\/strong\u003e Recommended for very low-output phono signals around 0.25mV or lower\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eGain Adjustment:\u003c\/strong\u003e Four-position rear-panel rotary selector\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eCartridge Loading Selection:\u003c\/strong\u003e Dedicated MM\/MC impedance switch\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eMM Input Impedance:\u003c\/strong\u003e 47kΩ\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eMC Input Impedance:\u003c\/strong\u003e 100Ω\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eInput Loading Options:\u003c\/strong\u003e 47kΩ or 100Ω\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eTotal Audio Input Types:\u003c\/strong\u003e 1\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eAnalog Phono Input:\u003c\/strong\u003e 1 × stereo RCA pair\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eInput Signal:\u003c\/strong\u003e Low-level MM\/MC phono signal from a compatible turntable\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eTotal Audio Output Types:\u003c\/strong\u003e 1\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eAnalog Audio Output:\u003c\/strong\u003e 1 × stereo RCA pair\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eOutput Signal:\u003c\/strong\u003e RIAA-equalized, amplified analog audio for a compatible line-level input\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eOutput Impedance:\u003c\/strong\u003e 10kΩ, as listed in the manufacturer user manual\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eGround Connection:\u003c\/strong\u003e 1 × turntable grounding terminal\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eSignal-to-Noise Ratio:\u003c\/strong\u003e At least 92dB (38dB gain, 5mV input)\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eTotal Harmonic Distortion:\u003c\/strong\u003e 0.009% (38dB gain, 5mV input)\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eNoise Floor:\u003c\/strong\u003e 37µV (38dB gain, 5mV input)\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e 20Hz–20kHz (±0.015dB)\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003ePower Button:\u003c\/strong\u003e Front-panel push-button control\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003ePower-On Operation:\u003c\/strong\u003e Press and hold approximately 2 seconds\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003ePower-Off Operation:\u003c\/strong\u003e Single press\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003ePower Indicator:\u003c\/strong\u003e Front-panel LED\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eVolume Control:\u003c\/strong\u003e No dedicated listening-volume control\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eChassis Material:\u003c\/strong\u003e Aluminum alloy\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eChassis Design:\u003c\/strong\u003e Compact metal enclosure with electromagnetic interference shielding\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Black\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 4.1 × 6.5 × 1.4 inches (manufacturer-listed)\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003ePower Input:\u003c\/strong\u003e AC 15–18V\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eIncluded Power Supply:\u003c\/strong\u003e 16V\/1A AC adapter\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003ePower Supply Type:\u003c\/strong\u003e External AC-output adapter; not a DC adapter\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eBuilt-In DAC:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eDigital Audio Inputs:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eBluetooth:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eWi-Fi:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eApple AirPlay:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eBuilt-In Music Streaming:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eUSB Audio:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eHDMI Inputs:\u003c\/strong\u003e 0\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eHDMI Outputs:\u003c\/strong\u003e 0\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eHeadphone Output:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eSpeaker-Level Outputs:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eDirect Passive Speaker Amplification:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eStereo Speaker Pairs Powered:\u003c\/strong\u003e 0\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003e12V Trigger Input:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003e12V Trigger Output:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eApp Control:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eRemote Control:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eManufacturer Warranty:\u003c\/strong\u003e 24-month limited warranty\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eIncluded Accessories:\u003c\/strong\u003e Fosi Audio BOX X5 Phono Preamplifier, 16V AC power adapter, and user manual\u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003eWhat It's Great At\u003c\/h4\u003e \u003cul\u003e   \u003cli\u003e\n\u003cstrong\u003eVersatile MM and MC Cartridge Compatibility:\u003c\/strong\u003e Supports both moving magnet and moving coil cartridges, making it easy to integrate the BOX X5 with a wide range of compatible turntables and cartridge upgrades.\u003c\/li\u003e    \u003cli\u003e\n\u003cstrong\u003eFour Adjustable Gain Settings:\u003c\/strong\u003e Select 38dB, 48dB, 56dB, or 66dB of amplification to better match the output voltage of your turntable cartridge.\u003c\/li\u003e    \u003cli\u003e\n\u003cstrong\u003eAccurate RIAA Phono Equalization:\u003c\/strong\u003e Dedicated RIAA equalization circuitry restores the intended tonal balance of vinyl recordings for accurate, engaging analog playback.\u003c\/li\u003e    \u003cli\u003e\n\u003cstrong\u003ePremium Low-Noise Audio Components:\u003c\/strong\u003e An OPA1612 operational amplifier, precision film resistors and capacitors, and gold-plated RCA terminals help minimize unwanted noise and preserve musical detail.\u003c\/li\u003e    \u003cli\u003e\n\u003cstrong\u003eSimple Stereo System Integration:\u003c\/strong\u003e Dedicated RCA input and output connections, a turntable ground terminal, and rear-panel cartridge loading controls make installation straightforward.\u003c\/li\u003e    \u003cli\u003e\n\u003cstrong\u003eDurable All-Aluminum Construction:\u003c\/strong\u003e A compact aluminum alloy enclosure helps shield the sensitive phono circuitry from electromagnetic interference while complementing modern and traditional Hi-Fi systems.\u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003eFAQ Section\u003c\/h4\u003e  \u003cp\u003e\u003cstrong\u003eQ: What is the Fosi Audio BOX X5 used for?\u003c\/strong\u003e\u003cbr\u003e A: The Fosi Audio BOX X5 is a dedicated phono preamplifier designed to amplify the low-level audio signal from a turntable cartridge and apply RIAA equalization. This creates a signal suitable for connection to a compatible line-level input on an integrated amplifier, preamplifier, or powered speaker system. It is especially useful for turntables and amplifiers that do not include a compatible built-in phono stage.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio BOX X5 support moving magnet and moving coil cartridges?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The BOX X5 supports both moving magnet (MM) and moving coil (MC) cartridges. It includes selectable input loading of 47kΩ for MM cartridges and 100Ω for compatible MC cartridges, along with four gain levels to accommodate different cartridge output voltages. Always verify the loading requirements of your specific cartridge.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: What are the four gain settings on the Fosi Audio BOX X5?\u003c\/strong\u003e\u003cbr\u003e A: The BOX X5 features selectable gain settings of 38dB, 48dB, 56dB, and 66dB. Lower settings are typically used with higher-output cartridges, while higher settings accommodate lower-output designs. Fosi Audio recommends 38dB or 48dB with the 47kΩ MM loading setting and 56dB or 66dB with the 100Ω MC loading setting as starting points.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: What is RIAA equalization, and why does the BOX X5 need it?\u003c\/strong\u003e\u003cbr\u003e A: RIAA equalization is the standardized frequency correction used in vinyl playback. During record production, bass frequencies are reduced and high frequencies are increased to help optimize the recording process. The BOX X5 applies the complementary playback equalization curve to restore the intended tonal balance of the music while amplifying the cartridge's low-level signal.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: How many audio inputs and outputs does the Fosi Audio BOX X5 have?\u003c\/strong\u003e\u003cbr\u003e A: The BOX X5 has one stereo RCA phono input and one stereo RCA analog output. It also includes a separate grounding terminal for connecting the turntable's ground wire. It does not have digital audio inputs, headphone outputs, speaker binding posts, or balanced XLR connections.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can I connect the Fosi Audio BOX X5 directly to powered speakers?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The BOX X5 can connect to compatible powered speakers with analog line-level inputs and their own volume control. It can also connect to an integrated amplifier or separate preamplifier. The BOX X5 cannot directly power passive speakers, and its output should connect to a line-level input rather than another phono input.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio BOX X5 support Bluetooth, Wi-Fi, or streaming music?\u003c\/strong\u003e\u003cbr\u003e A: No. The BOX X5 is a dedicated analog phono preamplifier and does not include Bluetooth, Wi-Fi, Apple AirPlay, or built-in music streaming services. It is specifically designed for playback from compatible turntables rather than digital audio sources.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: What power supply does the Fosi Audio BOX X5 use?\u003c\/strong\u003e\u003cbr\u003e A: The BOX X5 uses an external 16V AC power adapter, which is included. Its supported input range is 15–18V AC. The unit requires an appropriate AC-output adapter and should not be powered using a conventional DC power supply.\u003c\/p\u003e","brand":"Fosi Audio","offers":[{"title":"Default Title","offer_id":62887309213855,"sku":"FOS-BOXX5-BLK","price":109.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0495\/6910\/4031\/files\/0e8c3adf-62d7-43fe-b321-15e1ed0058b7.jpg?v=1791574756"},{"product_id":"fosi-audio-carbon12-pure-carbon-in-ear-monitors","title":"Fosi Audio Carbon12 Pure Carbon In-Ear Monitors","description":"\u003ch3\u003eFosi Audio Carbon12 Pure Carbon In-Ear Monitors\u003c\/h3\u003e  \u003cp\u003eExperience a new approach to high-fidelity personal audio with the Fosi Audio Carbon12 Pure Carbon In-Ear Monitors, premium wired earphones designed to combine advanced diaphragm technology, precision craftsmanship, and a rich, engaging sound signature. Featuring a 12mm dynamic driver with Fosi Audio's proprietary UTPT™ (Ultra Thin Ply Technology) pure carbon diaphragm, the Carbon12 delivers fast transient response, impressive detail, and natural musical reproduction. Its TC4 titanium alloy housings, forged carbon fiber faceplates, and lightweight ergonomic design make it an excellent choice for music enthusiasts seeking a refined listening experience at home or on the go.\u003c\/p\u003e  \u003cp\u003eAt the heart of the Carbon12 is its innovative 12mm UTPT™ pure carbon diaphragm. Carbon fiber is prized in high-performance industries for its combination of low weight and exceptional rigidity, and Fosi Audio applies these same material properties to its dynamic driver design. By creating an ultra-thin diaphragm with excellent structural stiffness, UTPT™ technology helps the driver respond quickly to changes in the audio signal while minimizing unwanted flexing and distortion. The result is precise transient reproduction, controlled bass, and clear instrumental detail across a wide frequency response of 20Hz to 40kHz. With a manufacturer-rated total harmonic distortion of 0.5% or less at 1kHz, the Carbon12 is engineered to preserve musical clarity even during demanding passages.\u003c\/p\u003e  \u003cp\u003eThe Carbon12 features a carefully tuned dual-chamber acoustic architecture designed to improve soundstage presentation and listening comfort. Its open front-chamber structure helps relieve the pressure sensation sometimes associated with in-ear monitors, allowing music to feel more spacious and natural. Inside the rear chamber, dedicated acoustic damping foam absorbs unwanted standing waves and reflections, helping reduce resonance and maintain a cleaner sound. A diffused pressure-relief vent further balances internal pressure, contributing to the Carbon12's controlled low-frequency response and open, immersive presentation.\u003c\/p\u003e  \u003cp\u003eFosi Audio has tuned the Carbon12 for a warm, full-bodied listening experience that balances technical accuracy with musical engagement. Its low frequencies provide weight and texture without overwhelming the presentation, while slightly forward midrange reproduction gives vocals and acoustic instruments a rich, expressive character. Fast transients and detailed high-frequency performance help reveal subtle musical information, making the Carbon12 particularly enjoyable for vocal-focused recordings, pop, acoustic music, and a wide variety of other genres. This carefully balanced tuning makes it an appealing choice for listeners who want a detailed yet inviting sound rather than an overly analytical presentation.\u003c\/p\u003e  \u003cp\u003ePremium materials play an equally important role in the Carbon12's design. Each earpiece features a rigid TC4 titanium alloy housing, chosen for its strength, durability, and ability to minimize unwanted vibrations. The forged carbon fiber faceplates are crafted through a multi-stage process involving layering, stamping, controlled heating, forging, and precision CNC machining. This process gives every faceplate its own distinctive carbon fiber pattern while helping reduce unwanted resonance between the enclosure and dynamic driver. Despite their durable construction, the Carbon12 earpieces weigh just 7.5 grams each, with rounded ergonomic shells designed to follow the natural contours of the ear for comfortable extended listening.\u003c\/p\u003e  \u003cp\u003eFor listeners who enjoy customizing their sound, the Carbon12 includes multiple interchangeable ear tips and acoustic tuning foams. Three ear tip tuning styles, available in multiple sizes, allow you to experiment with fit, comfort, and perceived bass response. Additional nozzle tuning foams are provided in low-, medium-, and high-density options, making it possible to subtly adjust the upper-frequency presentation. Higher-density filters help soften upper treble energy, while lower-density filters provide a brighter, more open character. The included tweezers make it easy to replace the tuning materials, allowing you to tailor the Carbon12 to your preferred sound signature without changing earphones.\u003c\/p\u003e  \u003cp\u003eA detachable four-core silver-plated oxygen-free copper cable completes the Carbon12's premium design. Engineered for clean, low-resistance signal transmission, the braided cable uses standard 0.78mm 2-pin connectors for compatibility with suitable aftermarket replacement cables. The included cable terminates in a standard 3.5mm single-ended plug, allowing connection to compatible portable music players, headphone amplifiers, and devices equipped with a traditional headphone jack. Listeners who prefer balanced amplification can upgrade to a separately purchased compatible 4.4mm balanced cable. With an impedance of 37 ohms and sensitivity of 108dB\/Vrms at 1kHz, the Carbon12 is designed to perform well with compatible portable DACs, digital audio players, and headphone amplifiers.\u003c\/p\u003e  \u003cp\u003eCombining innovative pure carbon diaphragm technology, precision titanium construction, customizable acoustic tuning, and a comfortable lightweight fit, the Fosi Audio Carbon12 offers a distinctive approach to premium wired listening. Whether you're discovering subtle details in familiar recordings, enjoying high-resolution music through a dedicated DAC, or simply relaxing with your favorite albums, the Carbon12 delivers a sophisticated combination of engineering, musicality, and everyday versatility.\u003c\/p\u003e  \u003ch4\u003eSpecifications\u003c\/h4\u003e \u003cul\u003e   \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Fosi Audio\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e Carbon12\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Wired in-ear monitors (IEMs)\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eHeadphone Style:\u003c\/strong\u003e In-ear\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eDriver Configuration:\u003c\/strong\u003e Single dynamic driver per earpiece\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eDriver Size:\u003c\/strong\u003e 12mm\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eDriver Technology:\u003c\/strong\u003e UTPT™ Pure Carbon Dynamic Driver\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eDiaphragm Material:\u003c\/strong\u003e Ultra-thin pure carbon\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eDiaphragm Technology:\u003c\/strong\u003e UTPT™ (Ultra Thin Ply Technology)\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eDriver Design:\u003c\/strong\u003e Low-mass, high-rigidity pure carbon diaphragm\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eAcoustic Architecture:\u003c\/strong\u003e Dual-chamber dynamic driver enclosure\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eFront Chamber:\u003c\/strong\u003e Pressure-relieving open front-chamber acoustic design\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eRear Chamber:\u003c\/strong\u003e Damped acoustic chamber with sound-absorbing foam\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003ePressure Management:\u003c\/strong\u003e Diffused pressure-relief vent\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e 20Hz–40kHz\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eImpedance:\u003c\/strong\u003e 37 ohms\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eSensitivity:\u003c\/strong\u003e 108dB\/Vrms at 1kHz\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eTotal Harmonic Distortion:\u003c\/strong\u003e 0.5% or less at 1kHz\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eSound Signature:\u003c\/strong\u003e Warm, full-bodied tuning\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eMidrange Presentation:\u003c\/strong\u003e Slightly forward vocal reproduction\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eHousing Material:\u003c\/strong\u003e TC4 titanium alloy\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eFaceplate Material:\u003c\/strong\u003e Forged carbon fiber\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eFaceplate Construction:\u003c\/strong\u003e Multi-stage carbon fiber forging and CNC machining\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eFaceplate Appearance:\u003c\/strong\u003e Individual natural forged carbon fiber patterns\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eHousing Design:\u003c\/strong\u003e Rounded ergonomic shell\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eWeight Per Earbud:\u003c\/strong\u003e 7.5g\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eTotal Earbud Weight:\u003c\/strong\u003e 15g, excluding cable and accessories\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eCable Type:\u003c\/strong\u003e Detachable four-core braided audio cable\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eCable Conductor Material:\u003c\/strong\u003e Silver-plated oxygen-free copper (OFC)\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eCable Connection:\u003c\/strong\u003e Standard 0.78mm 2-pin\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eIncluded Cable Termination:\u003c\/strong\u003e 3.5mm single-ended stereo plug\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eBalanced Cable Compatibility:\u003c\/strong\u003e Supports compatible aftermarket 4.4mm balanced cables using 0.78mm 2-pin connectors\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003e4.4mm Balanced Cable Included:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eWired Connectivity:\u003c\/strong\u003e 3.5mm analog audio\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eEar Tip Customization:\u003c\/strong\u003e Three acoustic tuning styles in multiple sizes\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eEar Tip Size Options:\u003c\/strong\u003e Small, medium, and large\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eNozzle Tuning System:\u003c\/strong\u003e Replaceable acoustic damping foam inserts\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eAvailable Nozzle Filter Densities:\u003c\/strong\u003e Low, medium, and high\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eLow-Density Filter:\u003c\/strong\u003e Brighter upper-frequency presentation\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eHigh-Density Filter:\u003c\/strong\u003e Softer upper-treble presentation\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eFilter Replacement Tool:\u003c\/strong\u003e Tweezers included\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eRecommended Source Devices:\u003c\/strong\u003e Compatible digital audio players, portable DACs, headphone amplifiers, and devices with 3.5mm headphone outputs\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eAudio Channels:\u003c\/strong\u003e 2-channel stereo\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eBuilt-In DAC:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eActive Noise Cancellation:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eBluetooth:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eWi-Fi:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eApple AirPlay:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eBuilt-In Music Streaming:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eApp Control:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eBattery Required:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eCharging Required:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eUSB-C Audio Connection:\u003c\/strong\u003e Requires a compatible external USB-C DAC or adapter\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 24-month limited manufacturer warranty\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eIncluded Accessories:\u003c\/strong\u003e Fosi Audio Carbon12 in-ear monitors, detachable 3.5mm silver-plated OFC cable, assorted tuning ear tips, low-\/medium-\/high-density nozzle tuning foams, and replacement tweezers\u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003eWhat It's Great At\u003c\/h4\u003e \u003cul\u003e   \u003cli\u003e\n\u003cstrong\u003eInnovative UTPT™ Pure Carbon Diaphragm:\u003c\/strong\u003e A 12mm ultra-thin pure carbon dynamic driver combines low mass and high rigidity for fast transient response, precise detail, and controlled low-frequency performance.\u003c\/li\u003e    \u003cli\u003e\n\u003cstrong\u003eWarm, Full-Bodied Music Reproduction:\u003c\/strong\u003e Carefully balanced tuning delivers rich vocals, textured bass, and a natural presentation suited to everything from acoustic recordings to modern pop music.\u003c\/li\u003e    \u003cli\u003e\n\u003cstrong\u003ePremium Titanium and Carbon Fiber Construction:\u003c\/strong\u003e TC4 titanium alloy housings and forged carbon fiber faceplates provide a durable, distinctive design while helping reduce unwanted acoustic resonance.\u003c\/li\u003e    \u003cli\u003e\n\u003cstrong\u003eComfortable Lightweight Fit:\u003c\/strong\u003e Ergonomic earpieces weighing just 7.5g each help provide a secure, comfortable fit for longer listening sessions at home or on the go.\u003c\/li\u003e    \u003cli\u003e\n\u003cstrong\u003eCustomizable Acoustic Tuning:\u003c\/strong\u003e Three ear tip styles and interchangeable nozzle tuning foams let listeners fine-tune fit, perceived bass response, and treble presentation to suit their preferences.\u003c\/li\u003e    \u003cli\u003e\n\u003cstrong\u003eDetachable Silver-Plated OFC Cable:\u003c\/strong\u003e A four-core silver-plated oxygen-free copper cable with standard 0.78mm 2-pin connectors and a 3.5mm termination offers convenient compatibility with portable music devices and aftermarket cable upgrades.\u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003eFAQ Section\u003c\/h4\u003e  \u003cp\u003e\u003cstrong\u003eQ: What makes the Fosi Audio Carbon12 different from traditional dynamic-driver IEMs?\u003c\/strong\u003e\u003cbr\u003e A: The Carbon12 uses Fosi Audio's proprietary UTPT™ (Ultra Thin Ply Technology) pure carbon diaphragm in its 12mm dynamic driver. This technology creates an exceptionally thin, rigid diaphragm designed for fast transient response, accurate frequency reproduction, and controlled distortion. It also features premium TC4 titanium housings and forged carbon fiber faceplates.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: What type of sound signature does the Fosi Audio Carbon12 have?\u003c\/strong\u003e\u003cbr\u003e A: The Carbon12 is tuned for a warm, full-bodied sound with detailed transient response and slightly forward midrange reproduction. Its presentation emphasizes rich, textured vocals and natural musicality while maintaining clarity across a broad frequency range. The included ear tips and tuning filters provide additional opportunities to customize the sound.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio Carbon12 require a headphone amplifier?\u003c\/strong\u003e\u003cbr\u003e A: Not necessarily. With a 37-ohm impedance and 108dB\/Vrms sensitivity, the Carbon12 is designed to work with compatible portable digital audio players, dongle DACs, and headphone amplifiers. A dedicated DAC or headphone amplifier may provide additional connection options and volume headroom, but it is not required for every listening setup.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: What cable connection does the Fosi Audio Carbon12 use?\u003c\/strong\u003e\u003cbr\u003e A: The Carbon12 includes a detachable four-core silver-plated oxygen-free copper cable with standard 0.78mm 2-pin connectors and a 3.5mm single-ended audio plug. This makes it compatible with equipment equipped with a traditional 3.5mm headphone output and allows the cable to be replaced with compatible aftermarket alternatives.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can I use the Fosi Audio Carbon12 with a 4.4mm balanced headphone output?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The Carbon12 uses standard 0.78mm 2-pin detachable cable connections, allowing it to support compatible aftermarket cables terminated with a 4.4mm balanced plug. However, the included cable uses a 3.5mm single-ended connection, so a separate 4.4mm balanced cable is required for balanced playback.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can I customize the sound of the Fosi Audio Carbon12?\u003c\/strong\u003e\u003cbr\u003e A: Yes. The Carbon12 includes multiple ear tip styles in different sizes and three densities of replaceable acoustic nozzle foams. Lower-density filters provide a brighter upper-frequency presentation, while higher-density filters soften the upper treble. The included tweezers help make filter replacement easier.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Are the Fosi Audio Carbon12 earphones comfortable for extended listening?\u003c\/strong\u003e\u003cbr\u003e A: The Carbon12 is designed for comfortable everyday use with ergonomic, rounded housings that follow the contours of the ear. Each titanium alloy earpiece weighs just 7.5g, and the included ear tip options allow listeners to experiment with different fits and levels of isolation.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio Carbon12 have Bluetooth or active noise cancellation?\u003c\/strong\u003e\u003cbr\u003e A: No. The Carbon12 is a dedicated wired in-ear monitor and does not include Bluetooth, Wi-Fi, active noise cancellation, or a rechargeable battery. Its traditional analog cable connection is designed for music listeners who prioritize wired playback through compatible headphone outputs, DACs, and digital audio players.\u003c\/p\u003e","brand":"Fosi Audio","offers":[{"title":"Default Title","offer_id":62887309508767,"sku":"FOS-CARBON12-SIL","price":149.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0495\/6910\/4031\/files\/00ef966a-a8f2-4bb1-8463-8ba59c55d560.jpg?v=1791575144"},{"product_id":"fosi-audio-zh1-smart-tuned-fully-balanced-desktop-dac-headphone-amplifier","title":"Fosi Audio ZH1 Smart-Tuned Fully Balanced Desktop DAC \u0026 Headphone Amplifier","description":"\u003ch3\u003eFosi Audio ZH1 Smart-Tuned Fully Balanced Desktop DAC \u0026amp; Headphone Amplifier\u003c\/h3\u003e  \u003cp\u003eExperience powerful, personalized desktop audio with the Fosi Audio ZH1 Smart-Tuned Fully Balanced Desktop DAC \u0026amp; Headphone Amplifier, an all-in-one Hi-Fi component designed for music enthusiasts, gamers, and headphone listeners who want exceptional sound with advanced customization. Featuring a premium ESS ES9039Q2M DAC, XMOS XU316 USB processor, and dual Texas Instruments TPA6120 amplifier chips, the ZH1 combines high-resolution digital-to-analog conversion with fully balanced Class-AB headphone amplification. Delivering up to 2,300mW per channel into 32 ohms through its balanced headphone output, the ZH1 provides ample power for compatible in-ear monitors and over-ear headphones. With AI-assisted parametric EQ, versatile digital connections, and customizable RGB lighting, the ZH1 brings modern performance and flexibility to your desktop listening setup.\u003c\/p\u003e  \u003cp\u003eAt the heart of the ZH1 is the ESS Sabre ES9039Q2M digital-to-analog converter, paired with an XMOS XU316 USB processor capable of decoding PCM audio up to 32-bit\/768kHz and DSD512. The fully balanced Class-AB amplification circuit uses two Texas Instruments TPA6120 amplifier chips to deliver detailed sound with low distortion and excellent dynamic range. Fosi Audio's carefully optimized circuitry provides a manufacturer-rated signal-to-noise ratio of at least 124dB, total harmonic distortion plus noise of 0.0002% or less, and a noise floor of 1.7µV or less. This combination helps preserve subtle musical details while providing the dynamic performance needed for demanding recordings, games, and movies.\u003c\/p\u003e  \u003cp\u003eOne of the ZH1's standout features is its Smart Acoustic Assistant, an AI-assisted parametric equalization system designed to simplify personalized sound tuning. Instead of manually adjusting complex EQ settings, users can describe their preferred sound characteristics or select listening presets optimized for gaming, movies, and music. The system can generate personalized parametric EQ profiles and reference an open-source headphone database to help align supported headphone frequency responses with the Harman Target. A dedicated web-based control panel provides visual EQ adjustment, profile management, and EQ file sharing, allowing listeners to fine-tune their sound without requiring extensive audio engineering knowledge.\u003c\/p\u003e  \u003cp\u003eDesigned to accommodate a wide variety of headphones, the Fosi Audio ZH1 features three headphone connections: a 3.5mm single-ended output, a 6.35mm single-ended output, and a 4.4mm balanced output. The 4.4mm balanced connection delivers up to 2,300mW per channel into 32 ohms, while the 6.35mm single-ended output provides up to 589mW per channel into 32 ohms. Three selectable gain levels allow the ZH1 to accommodate compatible headphones with impedances from 8 to 300 ohms, making it suitable for sensitive in-ear monitors as well as many full-size audiophile headphones. A convenient output-switching function lets users move between headphone playback and the rear stereo RCA output, with independent volume memory for each listening mode.\u003c\/p\u003e  \u003cp\u003eConnectivity is another strength of the ZH1. USB-C, optical, and coaxial digital inputs make it easy to connect compatible computers, CD transports, game consoles, and other digital audio sources. Support for USB Audio Class 1.0 expands compatibility with gaming systems such as the PlayStation 5 and Nintendo Switch, allowing the ZH1 to function as a dedicated gaming DAC and headphone amplifier. The rear stereo RCA output also allows the ZH1 to connect to compatible powered speakers or external amplifiers, making it a versatile centerpiece for desktop Hi-Fi systems that alternate between headphones and speakers.\u003c\/p\u003e  \u003cp\u003eThe ZH1 combines advanced audio functionality with a distinctive modern design. A 1.2-inch HD LCD displays essential playback information, while an aluminum rotary knob and touch-sensitive controls provide convenient access to volume, settings, and listening modes. A customizable RGB light ring offers nine dynamic lighting modes, including effects that respond to volume changes. Color, sensitivity, and lighting behavior can be adjusted through the web control panel, allowing the ZH1 to complement gaming stations, desktop audio systems, and minimalist listening spaces. With its combination of powerful balanced amplification, high-resolution audio conversion, intelligent sound tuning, and flexible connectivity, the Fosi Audio ZH1 offers a compelling all-in-one solution for personalized headphone listening and desktop Hi-Fi.\u003c\/p\u003e  \u003ch4\u003eSpecifications\u003c\/h4\u003e \u003cul\u003e   \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Fosi Audio\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e ZH1\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Fully balanced desktop DAC, headphone amplifier, and stereo preamplifier\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eAudio Channels:\u003c\/strong\u003e 2-channel stereo\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eAmplifier Class:\u003c\/strong\u003e Class-AB\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eAmplifier Architecture:\u003c\/strong\u003e Fully balanced headphone amplification\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eDAC Chip:\u003c\/strong\u003e ESS Sabre ES9039Q2M\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eUSB Audio Processor:\u003c\/strong\u003e XMOS XU316\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eHeadphone Amplifier Chips:\u003c\/strong\u003e 2 × Texas Instruments TPA6120\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eMaximum PCM Resolution:\u003c\/strong\u003e 32-bit\/768kHz\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eMaximum DSD Resolution:\u003c\/strong\u003e DSD512\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eMaximum Balanced Headphone Output Power:\u003c\/strong\u003e 2,300mW × 2 at 32 ohms, THD+N below 1%\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eMaximum Single-Ended Headphone Output Power:\u003c\/strong\u003e 589mW × 2 at 32 ohms, THD+N below 1%\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eSupported Headphone Impedance:\u003c\/strong\u003e 8–300 ohms\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eGain Settings:\u003c\/strong\u003e 3 selectable levels\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eSignal-to-Noise Ratio:\u003c\/strong\u003e At least 124dB\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eDynamic Range:\u003c\/strong\u003e At least 124dB\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eTotal Harmonic Distortion + Noise:\u003c\/strong\u003e 0.0002% or less\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eNoise Floor:\u003c\/strong\u003e 1.7µV or less\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eTotal Audio Input Types:\u003c\/strong\u003e 3\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eUSB Audio Input:\u003c\/strong\u003e 1 × USB-C\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eOptical Digital Input:\u003c\/strong\u003e 1 × TOSLINK\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eCoaxial Digital Input:\u003c\/strong\u003e 1 × coaxial S\/PDIF\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eUSB Audio Class Compatibility:\u003c\/strong\u003e UAC 1.0 support for compatible gaming consoles\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eGaming Compatibility:\u003c\/strong\u003e Compatible PCs, PlayStation 5, and Nintendo Switch\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eTotal Audio Output Types:\u003c\/strong\u003e 4\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003e3.5mm Headphone Output:\u003c\/strong\u003e 1 × single-ended stereo\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003e6.35mm Headphone Output:\u003c\/strong\u003e 1 × single-ended stereo\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003e4.4mm Headphone Output:\u003c\/strong\u003e 1 × balanced stereo\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eAnalog RCA Output:\u003c\/strong\u003e 1 × stereo RCA pair\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eRCA Output Function:\u003c\/strong\u003e Analog output for compatible powered speakers and external amplifiers\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eOutput Switching:\u003c\/strong\u003e Quick double-tap switching between headphone and RCA output modes\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eVolume Memory:\u003c\/strong\u003e Independent volume memory for headphone and RCA output modes\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eSound Customization:\u003c\/strong\u003e AI-assisted parametric equalization\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eEQ System:\u003c\/strong\u003e Smart Acoustic Assistant\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eEQ Presets:\u003c\/strong\u003e Optimized listening profiles for gaming, movies, and music\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003ePersonalized EQ Generation:\u003c\/strong\u003e Natural-language sound preference input\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eHeadphone EQ Database:\u003c\/strong\u003e Integration with an open-source headphone measurement database\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eHeadphone Target Matching:\u003c\/strong\u003e Harman Target frequency response alignment for supported headphones\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eEQ Customization:\u003c\/strong\u003e Web-based visual parametric EQ adjustment\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eEQ Sharing:\u003c\/strong\u003e Supports EQ file sharing through the web control interface\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eControl Interface:\u003c\/strong\u003e Web-based settings and EQ customization panel\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eDisplay:\u003c\/strong\u003e 1.2-inch HD LCD\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eFront-Panel Controls:\u003c\/strong\u003e Aluminum rotary knob and touch-sensitive controls\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eRGB Lighting:\u003c\/strong\u003e Integrated customizable RGB light ring\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eLighting Modes:\u003c\/strong\u003e 9 dynamic RGB effects\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eVolume-Synchronized Lighting:\u003c\/strong\u003e Supported\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eLighting Customization:\u003c\/strong\u003e Adjustable color, sensitivity, and lighting effects through the web control panel\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003ePower Input:\u003c\/strong\u003e DC 12–15V\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eIncluded Power Supply:\u003c\/strong\u003e External power adapter\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eBuilt-In DAC:\u003c\/strong\u003e Yes\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eBuilt-In Headphone Amplifier:\u003c\/strong\u003e Yes\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eAnalog RCA Audio Inputs:\u003c\/strong\u003e 0\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eBalanced XLR Audio Outputs:\u003c\/strong\u003e 0\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eHeadphone Microphone Input:\u003c\/strong\u003e No dedicated microphone input listed\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003ePassive Speaker Amplification:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eSpeaker Binding Posts:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eStereo Speaker Pairs Powered Directly:\u003c\/strong\u003e 0\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eBluetooth Connectivity:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eWi-Fi Connectivity:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eApple AirPlay:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eBuilt-In Music Streaming Services:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eHDMI Inputs:\u003c\/strong\u003e 0\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eHDMI Outputs:\u003c\/strong\u003e 0\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eRemote Control:\u003c\/strong\u003e No\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eWeb-Based EQ Control:\u003c\/strong\u003e Yes\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003e12V Trigger Input:\u003c\/strong\u003e No dedicated connection listed\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003e12V Trigger Output:\u003c\/strong\u003e No dedicated connection listed\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eManufacturer Warranty:\u003c\/strong\u003e 24-month limited warranty\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eIncluded Accessories:\u003c\/strong\u003e Fosi Audio ZH1 DAC\/headphone amplifier, USB-A\/USB-C to USB-C cable, power adapter, and quick guide\u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003eWhat It's Great At\u003c\/h4\u003e \u003cul\u003e   \u003cli\u003e\n\u003cstrong\u003eAI-Assisted Personalized Sound:\u003c\/strong\u003e Smart Acoustic Assistant generates customized parametric EQ settings based on listening preferences, supported headphone measurements, and presets for gaming, movies, and music.\u003c\/li\u003e    \u003cli\u003e\n\u003cstrong\u003ePowerful Fully Balanced Headphone Amplification:\u003c\/strong\u003e Dual Texas Instruments TPA6120 amplifiers deliver up to 2,300mW per channel into 32 ohms through the 4.4mm balanced output for compatible audiophile headphones.\u003c\/li\u003e    \u003cli\u003e\n\u003cstrong\u003eHigh-Resolution ESS Sabre DAC:\u003c\/strong\u003e The ES9039Q2M DAC and XMOS XU316 processor support PCM up to 32-bit\/768kHz and DSD512 for detailed digital audio reproduction.\u003c\/li\u003e    \u003cli\u003e\n\u003cstrong\u003eVersatile Headphone and Speaker Connectivity:\u003c\/strong\u003e Three headphone connections and stereo RCA outputs provide flexibility for switching between personal listening and compatible desktop speaker systems.\u003c\/li\u003e    \u003cli\u003e\n\u003cstrong\u003eHi-Fi and Gaming Compatibility:\u003c\/strong\u003e USB-C, optical, and coaxial inputs with UAC 1.0 support accommodate compatible computers, digital audio sources, and gaming consoles, including PlayStation 5 and Nintendo Switch.\u003c\/li\u003e    \u003cli\u003e\n\u003cstrong\u003eCustomizable Display and RGB Lighting:\u003c\/strong\u003e A 1.2-inch LCD, responsive controls, and nine adjustable RGB lighting effects provide clear playback information and a personalized desktop appearance.\u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003eFAQ Section\u003c\/h4\u003e  \u003cp\u003e\u003cstrong\u003eQ: What is the Fosi Audio ZH1?\u003c\/strong\u003e A: The Fosi Audio ZH1 is a fully balanced desktop DAC, headphone amplifier, and stereo preamplifier designed for high-resolution music, gaming, and personal audio. It combines an ESS ES9039Q2M DAC, XMOS XU316 USB processor, and dual TPA6120 headphone amplifier chips with AI-assisted parametric equalization and versatile digital connectivity.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: How much headphone power does the Fosi Audio ZH1 deliver?\u003c\/strong\u003e A: The ZH1 delivers a maximum of 2,300mW per channel into 32 ohms through its balanced 4.4mm headphone output and 589mW per channel into 32 ohms through its single-ended output, measured with THD+N below 1%. It supports compatible headphones with impedances ranging from 8 to 300 ohms and includes three selectable gain levels.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: What headphone connections does the Fosi Audio ZH1 have?\u003c\/strong\u003e A: The ZH1 provides three wired headphone connections: 3.5mm single-ended, 6.35mm single-ended, and 4.4mm balanced. This allows users to connect compatible in-ear monitors and over-ear headphones without requiring a separate headphone amplifier.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: How does the Fosi Audio ZH1 AI Smart PEQ feature work?\u003c\/strong\u003e A: The Smart Acoustic Assistant allows users to describe their preferred sound characteristics or select presets for gaming, movies, and music. It can generate personalized parametric EQ settings and reference a headphone measurement database to help align supported headphones with the Harman Target. A web-based control panel provides additional visual tuning and EQ management.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio ZH1 support high-resolution audio?\u003c\/strong\u003e A: Yes. Its ESS ES9039Q2M DAC and XMOS XU316 USB processor support PCM playback up to 32-bit\/768kHz and DSD512 through compatible USB connections. Actual playback capability depends on the connected source, playback software, and selected audio format.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can the Fosi Audio ZH1 connect to powered speakers?\u003c\/strong\u003e A: Yes. The ZH1 includes a stereo RCA output for connection to compatible powered speakers or external amplifiers. A convenient double-tap control switches between headphone and RCA output modes, and independent volume memory helps preserve preferred listening levels when changing outputs.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can I use the Fosi Audio ZH1 with a PlayStation 5 or Nintendo Switch?\u003c\/strong\u003e A: Yes. The ZH1 supports USB Audio Class 1.0, providing compatibility with supported gaming consoles such as PlayStation 5 and Nintendo Switch. Its Smart Acoustic Assistant also includes gaming-focused EQ presets that can be customized to suit individual preferences.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio ZH1 support Bluetooth, Apple AirPlay, or Wi-Fi streaming?\u003c\/strong\u003e A: No. The ZH1 is a wired digital audio component with USB-C, optical, and coaxial inputs. It does not include Bluetooth, Wi-Fi, Apple AirPlay, or independent network streaming services. The web-based control panel is designed for EQ and device customization rather than built-in wireless music playback.\u003c\/p\u003e","brand":"Fosi Audio","offers":[{"title":"Default Title","offer_id":62887316455583,"sku":"FOS-ZH1-BLK","price":149.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0495\/6910\/4031\/files\/f9af7f92-8345-4c6c-9d1a-6047c4d23c2e.jpg?v=1791578528"},{"product_id":"fosi-audio-s3-lite-hi-fi-network-music-streamer-digital-transport","title":"Fosi Audio S3 Lite Hi-Fi Network Music Streamer \u0026 Digital Transport","description":"\u003ch3\u003eFosi Audio S3 Lite Hi-Fi Network Music Streamer \u0026amp; Digital Transport\u003c\/h3\u003e  \u003cp\u003eBring modern wireless music streaming to your existing Hi-Fi system with the Fosi Audio S3 Lite Hi-Fi Network Music Streamer \u0026amp; Digital Transport. Designed for listeners who already own a quality digital-to-analog converter, the S3 Lite delivers high-resolution digital audio through USB, optical, and coaxial outputs without adding another DAC to the signal chain. Featuring dual-band Wi-Fi 6, Bluetooth 5.3, Apple AirPlay 2, Google Cast, Spotify Connect, TIDAL Connect, and Qobuz Connect, this compact streamer makes it easy to access your favorite music services and personal libraries. With support for PCM audio up to 32-bit\/768kHz through a compatible USB DAC over a wired Ethernet connection, the S3 Lite brings advanced network playback to traditional and modern stereo systems alike.\u003c\/p\u003e  \u003cp\u003eAt the heart of the S3 Lite is an Amlogic A113X streaming processor designed to manage network audio playback and deliver digital signals directly to an external DAC. Unlike conventional music streamers with integrated analog conversion, the S3 Lite is a dedicated digital transport, allowing your existing DAC to handle the conversion process. Its USB-A digital audio output supports PCM resolutions up to 32-bit\/384kHz over Wi-Fi and 32-bit\/768kHz over Ethernet, while its optical and coaxial digital outputs support PCM up to 24-bit\/192kHz. Fosi Audio specifies digital-output THD+N as low as 0.000003%, reflecting its focus on clean digital signal transmission for high-fidelity listening.\u003c\/p\u003e  \u003cp\u003eDesigned to fit naturally into today's connected audio systems, the Fosi Audio S3 Lite supports dual-band 2.4GHz and 5GHz Wi-Fi 6 networking and a dedicated 10\/100Mbps Ethernet connection. Stream music directly from compatible applications using Spotify Connect, TIDAL Connect, and Qobuz Connect, or use Apple AirPlay 2 and Google Cast to send audio from compatible smartphones, tablets, and computers. DLNA support provides access to compatible music stored on network-attached storage devices and media servers. For convenient everyday listening, Bluetooth 5.3 with SBC and AAC codec support also allows direct wireless playback from compatible devices without requiring a network streaming app.\u003c\/p\u003e  \u003cp\u003eMulti-room audio support makes the S3 Lite especially useful for listeners who want music throughout their home. With Apple AirPlay 2 and Google Cast, compatible speakers and streaming devices can be grouped for synchronized playback across multiple rooms. Add an S3 Lite or compatible S3 streamer to different audio systems to expand your listening experience while continuing to use your preferred DACs and amplifiers. The Fosi Audio App, available for compatible iOS and Android devices, simplifies initial network configuration, streaming management, and sound customization. A built-in 10-band equalizer provides adjustable frequency controls, allowing you to fine-tune the digital audio signal for your speakers, listening space, or personal preferences.\u003c\/p\u003e  \u003cp\u003eConnectivity is straightforward and flexible. The S3 Lite features three digital audio outputs: USB-A, optical TOSLINK, and coaxial S\/PDIF. Connect the streamer to an external DAC, such as the Fosi Audio ZD3, or another compatible component with a digital audio input. The dedicated 12V trigger output allows the S3 Lite to synchronize power operation with compatible DACs and amplifiers, making it easier to turn an entire listening system on and off together. A front-panel output selector provides convenient switching between USB and S\/PDIF output modes, while the included Bluetooth remote offers wireless control over playback and system functions from distances exceeding 15 meters under suitable conditions.\u003c\/p\u003e  \u003cp\u003eThe S3 Lite's minimalist design makes it an excellent addition to both desktop audio systems and traditional Hi-Fi racks. Its compact 5.79-inch-wide chassis features a clean matte-black finish, front-panel status indicators, and straightforward power and pairing controls. With no internal DAC, headphone amplifier, or analog output stage, the S3 Lite focuses on delivering digital music to the components you already own. Whether you're upgrading a traditional stereo system, building a modern streaming setup around a dedicated DAC, or expanding music playback throughout your home, the Fosi Audio S3 Lite delivers versatile connectivity, high-resolution digital audio, and convenient control in one compact component.\u003c\/p\u003e  \u003ch4\u003eSpecifications\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Fosi Audio\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e S3 Lite\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Network music streamer and digital audio transport\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAudio Channels:\u003c\/strong\u003e 2-channel stereo digital audio\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDigital Transport Design:\u003c\/strong\u003e Dedicated digital audio output without an internal DAC\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eStreaming Processor:\u003c\/strong\u003e Amlogic A113X\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBuilt-In DAC:\u003c\/strong\u003e No; requires an external DAC or component with a compatible digital input\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNetwork Connectivity:\u003c\/strong\u003e Dual-band Wi-Fi 6 and wired Ethernet\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eWi-Fi Standards:\u003c\/strong\u003e IEEE 802.11 a\/b\/g\/n\/ac\/ax\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eWi-Fi Frequencies:\u003c\/strong\u003e 2.4GHz and 5GHz\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eEthernet Connection:\u003c\/strong\u003e 1 × RJ45 LAN input\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eEthernet Speed:\u003c\/strong\u003e 10\/100Mbps\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Version:\u003c\/strong\u003e Bluetooth 5.3\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Profiles:\u003c\/strong\u003e A2DP, AVRCP, and BTLE\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Audio Codecs:\u003c\/strong\u003e SBC and AAC\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApple AirPlay:\u003c\/strong\u003e AirPlay 2\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eGoogle Cast:\u003c\/strong\u003e Supported\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSpotify Connect:\u003c\/strong\u003e Supported\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTIDAL Connect:\u003c\/strong\u003e Supported\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eQobuz Connect:\u003c\/strong\u003e Supported\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDLNA:\u003c\/strong\u003e Supported\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRoon:\u003c\/strong\u003e Manufacturer advertises Roon Ready support; completed certification for the S3 Lite has not been independently confirmed\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMulti-Room Audio:\u003c\/strong\u003e Supported through compatible AirPlay 2 and Google Cast configurations\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNetwork Music Library Playback:\u003c\/strong\u003e Compatible DLNA servers and network music libraries\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eStreaming Audio Input Methods:\u003c\/strong\u003e Wi-Fi, Ethernet, and Bluetooth\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMaximum Network PCM Resolution:\u003c\/strong\u003e Up to 32-bit\/768kHz\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMaximum USB Output Resolution over Wi-Fi:\u003c\/strong\u003e PCM 32-bit\/384kHz\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMaximum USB Output Resolution over Ethernet:\u003c\/strong\u003e PCM 32-bit\/768kHz\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMaximum Optical Output Resolution:\u003c\/strong\u003e PCM 24-bit\/192kHz\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMaximum Coaxial Output Resolution:\u003c\/strong\u003e PCM 24-bit\/192kHz\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Audio Resolution:\u003c\/strong\u003e PCM up to 24-bit\/48kHz\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAirPlay 2 Audio Resolution:\u003c\/strong\u003e PCM up to 16-bit\/48kHz\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDigital Output THD+N:\u003c\/strong\u003e As low as 0.000003%, manufacturer specification\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTotal Digital Audio Output Types:\u003c\/strong\u003e 3\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUSB Digital Audio Output:\u003c\/strong\u003e 1 × USB-A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOptical Digital Audio Output:\u003c\/strong\u003e 1 × TOSLINK\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCoaxial Digital Audio Output:\u003c\/strong\u003e 1 × coaxial S\/PDIF\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUSB Function:\u003c\/strong\u003e Digital audio output to a compatible external USB DAC\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUSB Audio Input:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDigital Output Selection:\u003c\/strong\u003e Selectable USB or S\/PDIF output mode\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eExternal DAC Compatibility:\u003c\/strong\u003e Compatible USB, optical, or coaxial digital audio inputs\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e12V Trigger Output:\u003c\/strong\u003e 1 × 3.5mm connection\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e12V Trigger Input:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e12V Trigger Function:\u003c\/strong\u003e Synchronized power control for compatible downstream DACs and amplifiers\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSound Customization:\u003c\/strong\u003e Integrated 10-band equalizer\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eEQ Control:\u003c\/strong\u003e Adjustable through the Fosi Audio App\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eControl App:\u003c\/strong\u003e Fosi Audio App\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApp Compatibility:\u003c\/strong\u003e iPhone, iPad, and compatible Android phones and tablets\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDesktop App:\u003c\/strong\u003e No dedicated Windows, macOS, or Linux app\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApp Functions:\u003c\/strong\u003e Network setup, streaming management, playback settings, and EQ customization\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRemote Control:\u003c\/strong\u003e Included Bluetooth remote\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRemote Operating Range:\u003c\/strong\u003e Greater than 15 meters under suitable conditions\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRemote Functions:\u003c\/strong\u003e Power, playback, and audio source control\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFront-Panel Controls:\u003c\/strong\u003e Power\/input switch and Bluetooth pairing\/output selection button\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eInput Selection:\u003c\/strong\u003e Network or Bluetooth\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOutput Selection:\u003c\/strong\u003e USB or S\/PDIF\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Pairing Reset:\u003c\/strong\u003e Supported through front-panel controls\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFactory Reset:\u003c\/strong\u003e Supported through front-panel controls\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFront-Panel Indicators:\u003c\/strong\u003e Network, Bluetooth, and output\/status LEDs\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNetwork Indicator:\u003c\/strong\u003e Displays Wi-Fi\/Ethernet connection status\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBluetooth Indicator:\u003c\/strong\u003e Displays pairing and connection status\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOutput Status Indicator:\u003c\/strong\u003e Displays selected USB or S\/PDIF output mode\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFirmware Updates:\u003c\/strong\u003e Network-based OTA updates\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePower Requirement:\u003c\/strong\u003e DC 12V\/1.5A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIncluded Power Supply:\u003c\/strong\u003e External DC adapter\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eChassis Width:\u003c\/strong\u003e 147mm (5.79 inches)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eChassis Finish:\u003c\/strong\u003e Matte black\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBuilt-In Speaker Amplification:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSpeaker Binding Posts:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eStereo Speaker Pairs Powered Directly:\u003c\/strong\u003e 0\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHeadphone Output:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAnalog RCA Outputs:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBalanced XLR Outputs:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAnalog Audio Inputs:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHDMI Inputs:\u003c\/strong\u003e 0\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHDMI Outputs:\u003c\/strong\u003e 0\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHDMI ARC\/eARC:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePowered Subwoofer Output:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDedicated Display Screen:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer Warranty:\u003c\/strong\u003e 24-month limited warranty\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIncluded Accessories:\u003c\/strong\u003e Fosi Audio S3 Lite Streamer, DC power adapter, optical cable, Bluetooth remote control, and user manual\u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003eWhat It's Great At\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAdding Modern Streaming to an Existing DAC:\u003c\/strong\u003e USB-A, optical, and coaxial digital outputs allow the S3 Lite to deliver network music directly to your preferred external DAC without adding an unnecessary internal conversion stage.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eHigh-Resolution Digital Music Playback:\u003c\/strong\u003e Support for PCM audio up to 32-bit\/768kHz through USB over a wired Ethernet connection provides flexible high-resolution playback for compatible DACs and music sources.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eComprehensive Wireless Streaming Support:\u003c\/strong\u003e Wi-Fi 6, Bluetooth 5.3, Apple AirPlay 2, Google Cast, Spotify Connect, TIDAL Connect, Qobuz Connect, and DLNA provide extensive options for accessing digital music.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eFlexible Multi-Room Listening:\u003c\/strong\u003e Apple AirPlay 2 and Google Cast support synchronized audio playback across compatible devices and rooms, bringing your music to multiple listening spaces.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eCustomizable App-Based Sound:\u003c\/strong\u003e The Fosi Audio App provides network setup, playback management, and a 10-band EQ for adjusting frequency response to suit your system and listening preferences.\u003c\/li\u003e  \u003cli\u003e\n\u003cstrong\u003eConvenient Hi-Fi System Integration:\u003c\/strong\u003e A dedicated 12V trigger output, Bluetooth remote, compact matte-black chassis, and straightforward digital connectivity make the S3 Lite an ideal companion for compatible DACs and stereo amplifiers.\u003c\/li\u003e \u003c\/ul\u003e  \u003ch4\u003eFAQ Section\u003c\/h4\u003e  \u003cp\u003e\u003cstrong\u003eQ: What is the Fosi Audio S3 Lite used for?\u003c\/strong\u003e A: The Fosi Audio S3 Lite is a dedicated network music streamer and digital audio transport designed to bring modern streaming capabilities to an existing Hi-Fi system. It receives music through Wi-Fi, Ethernet, or Bluetooth and sends digital audio to an external DAC through USB-A, optical, or coaxial outputs. Unlike the full Fosi Audio S3, the S3 Lite does not include a built-in DAC or analog outputs.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: What music streaming services does the Fosi Audio S3 Lite support?\u003c\/strong\u003e A: The S3 Lite supports Spotify Connect, TIDAL Connect, Qobuz Connect, Apple AirPlay 2, Google Cast, and DLNA. These technologies provide access to compatible streaming apps and network music libraries. Roon Ready is also advertised by the manufacturer, although native certification for the S3 Lite has not been independently confirmed.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio S3 Lite support Apple AirPlay and Bluetooth?\u003c\/strong\u003e A: Yes. The S3 Lite supports Apple AirPlay 2 for streaming music from compatible Apple devices over a network. It also includes Bluetooth 5.3 with SBC and AAC codec support for convenient wireless audio playback from compatible smartphones, tablets, and computers.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio S3 Lite have a built-in DAC?\u003c\/strong\u003e A: No. The S3 Lite is a pure digital transport and does not contain an internal digital-to-analog converter. It requires a compatible external DAC or audio component with a USB, optical, or coaxial digital input to convert the music signal for analog playback. It does not have RCA, XLR, or headphone outputs.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: What digital audio outputs does the Fosi Audio S3 Lite have?\u003c\/strong\u003e A: The S3 Lite includes three digital audio outputs: one USB-A, one optical TOSLINK, and one coaxial S\/PDIF. The USB connection is an audio output for an external DAC rather than a USB audio input. USB and S\/PDIF output modes can be selected using the front-panel controls, with the supported resolution depending on the output and network connection.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: What is the maximum audio resolution supported by the Fosi Audio S3 Lite?\u003c\/strong\u003e A: Through its USB digital output, the S3 Lite supports PCM audio up to 32-bit\/384kHz over Wi-Fi and 32-bit\/768kHz over a wired Ethernet connection. Its optical and coaxial outputs support PCM up to 24-bit\/192kHz. Playback resolution also depends on the music source, streaming protocol, connected DAC, and network configuration.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Can I control the Fosi Audio S3 Lite with an app?\u003c\/strong\u003e A: Yes. The Fosi Audio App is available for compatible iOS and Android devices and provides initial network setup, streaming management, and sound customization through a 10-band equalizer. The S3 Lite also includes a Bluetooth remote that allows convenient control from distances exceeding 15 meters under suitable conditions. There is no dedicated Windows, macOS, or Linux companion app.\u003c\/p\u003e  \u003cp\u003e\u003cstrong\u003eQ: Does the Fosi Audio S3 Lite have a 12V trigger?\u003c\/strong\u003e A: Yes. The S3 Lite includes one 12V trigger output through a 3.5mm connection. This allows it to synchronize power operation with compatible downstream DACs or amplifiers, helping simplify a multi-component Hi-Fi system. The trigger connection is used for power control and does not carry audio or provide an additional audio output.\u003c\/p\u003e","brand":"Fosi Audio","offers":[{"title":"Default Title","offer_id":62887316914335,"sku":"FOS-S3LITE-BLK","price":199.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0495\/6910\/4031\/files\/f43c789c-80fd-4f6d-ace8-339e91fc2742.jpg?v=1791578817"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0495\/6910\/4031\/collections\/c516df24-08c0-45f2-9735-ceecdbb1c978.jpg?v=1791901453","url":"https:\/\/listenup.com\/collections\/fosi-audio.oembed","provider":"ListenUp","version":"1.0","type":"link"}