The Fosi Audio LC30 VU Meter Amplifier & Speaker Selector allows you to connect two stereo amplifiers and two pairs of passive speakers, offering four convenient listening configurations with support for up to 250 watts per channel at 4 ohms. Featuring dual 85 × 45mm analog VU meters, adjustable needle sensitivity, five backlight brightness levels, and an included infrared remote, the LC30 brings classic Hi-Fi styling and modern switching convenience to your audio system. Premium relay-based switching, protective load resistors, gold-plated speaker terminals, and a durable aluminum chassis make it an excellent solution for speaker comparisons, amplifier testing, and versatile home audio setups.
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Fosi Audio LC30 VU Meter Amplifier & Speaker Selector

Bring flexibility, convenience, and classic Hi-Fi styling to your audio system with the Fosi Audio LC30 VU Meter Amplifier & Speaker Selector. Designed for audiophiles who want to compare or switch between multiple amplifiers and speakers without constantly reconnecting cables, the LC30 accommodates up to two stereo amplifiers and two pairs of passive speakers. Its dual analog VU meters provide a visually engaging display of audio signal levels, while convenient front-panel controls and an included infrared remote make switching between components quick and effortless. Supporting up to 250 watts per channel into 4 ohms, the LC30 combines high-power signal handling with a premium aluminum chassis that complements both modern and traditional Hi-Fi systems.

At the heart of the LC30 is its versatile amplifier and speaker switching system. Two sets of stereo amplifier inputs and two sets of passive speaker outputs allow you to create four possible listening configurations, making it easy to compare different amplifiers with the same speakers or evaluate multiple speaker pairs with a single amplifier. Select between Amplifier A and Amplifier B or Speaker 1 and Speaker 2 using dedicated front-panel buttons or the included remote control. The LC30 operates with one amplifier and one speaker pair at a time, providing convenient A/B comparisons while keeping your system organized and eliminating the need for repeated cable changes.

Beyond its switching capabilities, the Fosi Audio LC30 brings a distinctive visual element to your listening space with two large 85 × 45mm analog VU meters. These classic needle-style meters display the signal activity of the left and right audio channels, capturing the dynamics of your favorite music in real time. An adjustable pointer sensitivity knob allows you to fine-tune needle movement to match your system's playback levels, while five backlight settings—100%, 75%, 50%, 25%, and off—let you customize the appearance for different lighting conditions. Whether you're enjoying a quiet evening listening session or showing off your Hi-Fi setup, the LC30 adds a vintage-inspired aesthetic without sacrificing modern convenience.

Engineered to preserve the quality of your audio signal, the LC30 uses premium relay-based switching components, thickened copper circuit traces, and high-quality gold-plated speaker terminals to minimize unwanted signal loss. Built-in 390-ohm protective load resistors help reduce the risk of amplifier no-load conditions when switching between connected components. Its broad compatibility accommodates many amplifier designs, including Class A, Class B, Class AB, Class D, BTL, OCL, and compatible tube amplifiers. The precision-engineered internal circuitry is designed for stable, reliable performance while preserving the character of your connected audio equipment.

The LC30's substantial CNC-machined aluminum alloy enclosure provides a durable foundation for desktop listening systems, dedicated Hi-Fi racks, and equipment comparison setups. Its sandblasted and anodized finish delivers a refined appearance that pairs beautifully with traditional stereo equipment and compact modern amplifiers. USB-C power keeps operation straightforward, while the included remote allows convenient control over amplifier selection, speaker switching, and VU meter lighting from your listening position. Whether you're comparing speakers, building a system with multiple amplifiers, or simply looking to add classic analog meters to your setup, the Fosi Audio LC30 is a versatile addition to any serious listening environment.

Specifications

• Brand: Fosi Audio
• Model: LC30
• Selected Model Variant: LC30-B
• Product Type: Amplifier selector, passive speaker switcher, and stereo VU meter
• Function: Switches between two connected stereo amplifiers and two pairs of passive speakers
• Amplifier Inputs: 2 stereo speaker-level input sets (Amplifier A and Amplifier B)
• Speaker Outputs: 2 stereo passive speaker output sets (Speaker 1 and Speaker 2)
• Maximum Connected Amplifiers: 2
• Maximum Connected Speaker Pairs: 2
• Available Switching Configurations: Amplifier A to Speaker 1, Amplifier A to Speaker 2, Amplifier B to Speaker 1, or Amplifier B to Speaker 2
• Simultaneous Operation: One amplifier and one speaker pair at a time
• Speaker A/B Switching: Yes
• Amplifier A/B Switching: Yes
• Maximum Supported Power: 250 watts per channel at 4 ohms
• Built-In Amplifier: No; the LC30 routes speaker-level signals from external amplifiers
• Supported Amplifier Types: BTL, OCL, Class A, Class B, Class AB, Class D, and compatible tube amplifiers
• Audio Connection Type: Speaker-level connections through binding-post terminals
• Amplifier Input Connections: Left and right positive/negative speaker terminals for Amplifier A and Amplifier B
• Speaker Output Connections: Left and right positive/negative speaker terminals for Speaker 1 and Speaker 2
• Speaker Terminals: Premium gold-plated binding posts
• Terminal Design: Upward- and downward-oriented terminals for convenient speaker cable connections
• Switching Mechanism: High-quality relay-based switching
• Relay Components: HKE relays
• Internal Circuitry: Thickened copper foil circuit traces designed to minimize signal loss
• Amplifier No-Load Protection: Built-in 390-ohm protective load resistors
• VU Meters: 2 large analog needle-style meters
• VU Meter Channels: Independent left and right channel signal indication
• VU Meter Dimensions: 85 × 45mm each (approximately 3.35 × 1.77 inches)
• VU Meter Sensitivity: Adjustable using the central pointer sensitivity knob
• VU Meter Backlighting: Adjustable illumination
• Brightness Settings: 5 levels: 100%, 75%, 50%, 25%, and off
• Front-Panel Controls: Amplifier selection, speaker selection, power, VU meter brightness, and pointer sensitivity
• Front-Panel Indicators: Amplifier A, Amplifier B, Speaker 1, and Speaker 2 selection LEDs
• Remote Control: Included infrared remote control
• Remote Functions: Power, Speaker 1/2 selection, Amplifier A/B selection, amplifier switching, speaker switching, VU meter backlight on/off, and brightness adjustment
• Remote Batteries: 2 AAA batteries required, not included
• Power Requirement: DC 5V
• Power Connection: USB-C
• USB-C Function: Power input only; does not support USB audio or data transfer
• Chassis Material: Aluminum alloy
• Chassis Construction: One-piece CNC-machined enclosure
• Exterior Finish: Sandblasted and anodized aluminum
• Dimensions: 236.6 × 143.5 × 77.4mm (approximately 9.31 × 5.65 × 3.05 inches)
• Weight: 1,560g (approximately 3.44 lbs)
• Analog RCA Inputs: No
• Balanced XLR Inputs: No
• Bluetooth Connectivity: No
• Wi-Fi Connectivity: No
• Digital Audio Inputs: No
• Built-In DAC: No
• Headphone Output: No
• Volume Control: No; central knob adjusts VU meter pointer sensitivity rather than audio volume
• Manufacturer Warranty: 24-month limited warranty
• Included Accessories: Fosi Audio LC30 amplifier/speaker selector, infrared remote control, USB-C power cable, and user manual

What It's Great At

• Convenient Amplifier and Speaker Switching: Connect up to two stereo amplifiers and two pairs of passive speakers, then switch between four possible combinations without repeatedly disconnecting and reconnecting speaker cables.
• Easy A/B Audio Comparisons: Dedicated front-panel controls and an included remote make it easy to compare amplifiers or speaker pairs while maintaining a consistent listening setup.
• Classic Analog VU Meter Display: Dual 85 × 45mm analog VU meters provide real-time visual feedback for the left and right audio channels, adding vintage-inspired style to a modern Hi-Fi system.
• High-Power Signal Handling: Supports amplifier output up to 250 watts per channel into 4 ohms, with relay-based switching, thickened copper circuitry, and premium binding posts designed to preserve audio signal quality.
• Adjustable Visual Experience: Five backlight brightness levels and adjustable VU meter sensitivity allow you to customize the appearance and needle movement to suit your listening environment.
• Premium Construction and Broad Compatibility: A CNC-machined aluminum enclosure, protective load resistors, and compatibility with many amplifier designs make the LC30 a versatile addition to desktop, home theater, and dedicated two-channel Hi-Fi systems.

FAQ Section

Q: What does the Fosi Audio LC30 do?
A: The Fosi Audio LC30 is an amplifier and speaker selector that allows you to connect up to two stereo amplifiers and two pairs of passive speakers. It lets you switch between different amplifier and speaker combinations without physically swapping speaker cables. Dual analog VU meters display audio signal activity for an added visual element.

Q: Can I connect two amplifiers and two pairs of speakers to the Fosi Audio LC30?
A: Yes. The LC30 features two stereo amplifier input sets and two stereo speaker output sets, providing four possible listening configurations. You can select Amplifier A or Amplifier B and route the selected amplifier to Speaker 1 or Speaker 2 using the front-panel controls or included remote.

Q: Can the Fosi Audio LC30 play both speaker pairs simultaneously?
A: No. The LC30 operates with only one amplifier and one pair of speakers at a time. It is designed for switching between speaker pairs or amplifiers rather than playing multiple speaker pairs simultaneously.

Q: How much amplifier power can the Fosi Audio LC30 handle?
A: The LC30 supports up to 250 watts per channel into 4 ohms. It is designed to handle speaker-level signals from compatible external amplifiers without adding its own amplification. The LC30 does not contain a power amplifier and cannot drive passive speakers on its own.

Q: Does the Fosi Audio LC30 have a remote control?
A: Yes. The LC30 includes an infrared remote that allows you to select between amplifiers and speaker pairs, control power, and adjust VU meter illumination. The remote requires two AAA batteries, which are not included.

Q: Can I adjust the VU meters on the Fosi Audio LC30?
A: Yes. The LC30 features a central sensitivity adjustment knob that controls the movement of the analog VU meter needles to accommodate different signal levels. The backlighting also offers five settings: 100%, 75%, 50%, 25%, and off. The sensitivity knob does not adjust your system's audio volume.

Q: Is the Fosi Audio LC30 compatible with Class-D and tube amplifiers?
A: The LC30 is designed to accommodate a broad range of amplifier types, including Class A, Class B, Class AB, Class D, BTL, OCL, and compatible tube amplifiers. It incorporates 390-ohm protective load resistors to reduce amplifier no-load conditions. Because some tube amplifiers require a specific speaker load at all times, always confirm switching and load compatibility with the amplifier manufacturer before connecting one.

Q: Does the Fosi Audio LC30 support Bluetooth, RCA audio, or digital inputs?
A: No. The LC30 is a speaker-level amplifier and speaker switcher rather than a music streamer, DAC, or integrated amplifier. Its audio connections consist of speaker-level binding posts for two amplifiers and two passive speaker pairs. The USB-C connection supplies power to the switching electronics and VU meter functions and does not accept digital audio.