No sound change after switching the gain switch?

The gain switch on the V3 MONO only works with the RCA input. When using RCA mode, switching the gain setting will noticeably change the volume. (If it's already set to RCA mode, the output level from the preamp is usually sufficient.)

Would the noise still occur if no audio input cables are connected?

Try replacing the audio source, using well-shielded audio cables, and switching to a different speaker.

Doesn't work in standby mode?

Use a separate power supply and power strip for each V3 MONO to avoid ground-loop noise affecting the standby function; if the light dims but the unit doesn't automatically shut down, please try replacing high-quality RCA cables.

V3 MONO don't have volume control or knobs?

Yes. V3 MONO is a pure power amplifier, it is recommended to use it with a DAC, preamplifier, or player with volume control.

V3 MONO is a mono channel amplifier. To achieve 2 channel amplifier effect, two V3 MONO are needed to connect two speakers.

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Fosi Audio V3 Mono Power Amplifier for Home Audio Speakers, Mini Monoblock Class D Amp with TPA3255, 240W for HiFi Home Theater AVR Receiver Component, RCA/XLR Balanced Inputs 48V/5A Power

Fosi Audio V3 Mono Power Amplifier for Home Audio Speakers, Mini Monoblock Class D Amp with TPA3255, 240W for HiFi Home Theater AVR Receiver Component, RCA/XLR Balanced Inputs 48V/5A Power

Product ID: 643218284

Details

Item dimensions L x W x H
14.5 x 10.8 x
Manufacturer
Fosiaudio
Maximum supply voltage
48 Volts (DC)
Minimum supply voltage
48 Volts (DC)
Voltage
230 Volts

⚡240W peak power output

🌀PFFB tech for ultra-low distortion

❄️Full-body heat dissipation design

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Description

🎧 Elevate your home audio game with power, precision, and style.

COOL UNDER PRESSURE - Innovative full-body heat dissipation and dual side vents keep your amp running stable during marathon listening sessions.
FLEXIBLE CONNECTIVITY - Supports balanced XLR/TRS and RCA inputs with gain toggle and customizable op-amps for a tailored sound signature.
AUDIOPHILE GRADE BUILD - Premium TPA3255 chip paired with Japanese Nichicon & ELNA capacitors ensures studio-level sound quality.
NEXT GEN SOUND CLARITY - PFFB technology crushes load dependency issues, delivering pristine audio fidelity with THD as low as 0.006%.
POWERHOUSE PERFORMANCE - Unleash 240W of pure, distortion-free sound to drive your high-end speakers with confidence.

The Fosi Audio V3 Mono is a compact, high-performance Class D power amplifier delivering 240W at 4Ω, designed for audiophiles building multi-channel home theater systems. Featuring cutting-edge PFFB technology, premium components, and advanced cooling, it ensures ultra-low distortion and stable output. With versatile balanced and single-ended inputs plus customizable op-amps, it offers professional-grade sound customization in a sleek, freestanding metal chassis.

Specifications

ASIN	B0D31M3DXY
Best Sellers Rank	#40,432 in Electronics ( See Top 100 in Electronics ) #111 in Home Audio Amplifiers
Brand Name	Fosi Audio
Country Of Origin	China
Customer Reviews	4.3 4.3 out of 5 stars (308)
Included Components	Quick Start Guide
Item Dimensions	14.5 x 10.8 x 4 centimeters
Item Weight	750 Grams
Manufacturer	Fosiaudio
Material Type	Metal
Maximum Output Power	240 watts
Maximum Supply Voltage	48 Volts (DC)
Minimum Supply Voltage	48 Volts (DC)
Model	V3 Mono
Mounting Type	Freestanding
Number of Channels	1
Number of Items	1
Output Power	240 Watts
Part Number	un pezzo
Specification Met	CE
Supply Current	1.04 Amps
Voltage	230 Volts
Warranty Description	2 years

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238580CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Senegal.

Secure transaction

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