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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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: 641505874

Details

Item dimensions L x W x H
5.71 x 4.24 x
Manufacturer
Fosi Audio
Maximum Supply Voltage
48
Minimum Supply Voltage
48
Voltage
230 volts

⚡240W peak power output

🔊THD as low as 0.006% for pristine sound

❄️Advanced full-body heat dissipation

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Description

🎶 Elevate your home audio game with power, precision, and style — don’t just listen, experience it!

COOL UNDER PRESSURE - Innovative chassis design with dual side vents keeps your amp running stable during marathon listening sessions.
POWERHOUSE PRECISION - Unleash 240W @4Ω to drive your high-end speakers with effortless clarity.
CUTTING EDGE PFFB TECH - Post-Filter Feedback tech slashes distortion and boosts frequency response like never before.
AUDIOPHILE GRADE ENGINEERING - TPA3255 chip paired with premium Nichicon, ELNA, and WIMA components for studio-level fidelity.
FLEXIBLE CONNECTIVITY CUSTOMIZATION - Supports RCA/XLR inputs with gain toggle and swappable op-amps for your unique sound signature.

The Fosi Audio V3 Mono Power Amplifier is a compact, high-performance Class D monoblock delivering 240W at 4Ω, designed for audiophiles and home theater enthusiasts. Featuring the advanced TPA3255 chip and proprietary PFFB technology, it offers ultra-low distortion (THD 0.006%) and exceptional sound clarity. Its robust build includes premium capacitors and inductors, a four-layer PCB, and a full-body heat dissipation system ensuring stable, long-term operation. With versatile RCA and balanced XLR inputs plus customizable op-amps, it seamlessly integrates into multi-channel setups, making it a must-have for those who demand both power and pristine audio fidelity.

Specifications

ASIN	B0D31M3DXY
Best Sellers Rank	#18,557 in Electronics ( See Top 100 in Electronics ) #86 in Audio Component Amplifiers
Brand Name	Fosi Audio
Customer Reviews	4.3 4.3 out of 5 stars (322)
Included Components	Fosi Audio V3 MONO Power Amplifier; 48V/5A Power Supply Unit; User Manual
Item Dimensions	5.71 x 4.24 x 1.57 inches
Item Weight	750 g
Manufacturer	Fosi Audio
Material Type	[metal]
Maximum Output Power	240 watts
Maximum Supply Voltage	48 volts_of_direct_current
Minimum Supply Voltage	48 volts_of_direct_current
Model	V3 Mono
Mounting Type	Surface Mount
Number of Channels	1
Output Power	240 watts
Part Number	un pezzo
Specification Met	CE
Supply Current	1.04 A
Voltage	230 volts
Warranty Description	24-month manufacturer

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239714CFA

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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TrustScore 4.5 | 7,300+ reviews

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