{"title":"Fosi Audio Preamps","description":"\u003cp style=\"text-align: center;\"\u003e\u003ca href=\"https:\/\/listenup.com\/pages\/fosi-audio\"\u003eFosi Audio\u003c\/a\u003e preamplifiers bring exceptional clarity, detail, and warmth to your audio system, enhancing every note of your favorite music. \u003cbr\u003eCombining high-quality components, versatile connectivity, and sleek designs, \u003cbr\u003eFosi Audio makes it easy to elevate your listening experience without breaking the bank.\u003c\/p\u003e","products":[{"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-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-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 QCC3031\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOperational Amplifiers:\u003c\/strong\u003e LME49720\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDAC Architecture:\u003c\/strong\u003e Fully balanced digital-to-analog conversion\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAnalog Circuitry:\u003c\/strong\u003e Proprietary current-to-voltage conversion circuit\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eInternal Components:\u003c\/strong\u003e High-precision wafer resistors and low-drift 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 PCM up to 24-bit\/192kHz\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCoaxial Audio Resolution:\u003c\/strong\u003e PCM up to 24-bit\/192kHz\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHDMI ARC Audio Resolution:\u003c\/strong\u003e PCM up to 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\u003eTotal Audio Input Types:\u003c\/strong\u003e 5\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUSB Audio Input:\u003c\/strong\u003e 1 × USB-B\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHDMI Input:\u003c\/strong\u003e 1 × HDMI ARC\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\u003eSelectable Input Modes:\u003c\/strong\u003e USB, HDMI ARC, optical, coaxial, and 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-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"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0495\/6910\/4031\/collections\/1af46ac2-1f07-42ba-b863-6d80917f485c.jpg?v=1791900373","url":"https:\/\/listenup.com\/collections\/fosi-audio-preamps.oembed","provider":"ListenUp","version":"1.0","type":"link"}