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: 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 @4Ω

🔊TPA3255 Class-D chip for pristine sound

❄️Full-body heat dissipation design

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Description

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

NEXT LEVEL COOLING - Stay cool under pressure with innovative full-body heat dissipation and dual side vents for marathon listening sessions.
POWERHOUSE PRECISION - Unleash 240W of clean, distortion-free power to drive your high-end speakers with confidence.
FLEXIBLE CONNECTIVITY - Seamlessly switch between RCA and balanced XLR/TRS inputs with gain control for ultimate system compatibility.
CUSTOM SOUND SIGNATURE - Personalize your audio with swappable NE5532 op-amps—tailor your sound like a true audio connoisseur.
AUDIOPHILE GRADE ENGINEERING - Experience ultra-low THD (0.006%) and crystal-clear sound thanks to premium Nichicon, ELNA, and WIMA components.

The Fosi Audio V3 Mono Power Amplifier is a compact, high-performance Class-D monoblock delivering 240W at 4Ω, powered by the advanced TPA3255 chip. Designed for audiophiles and home theater enthusiasts, it features cutting-edge PFFB technology for superior sound fidelity, premium Japanese and German components for ultra-low distortion, and a robust cooling system to maintain stable output. With versatile RCA and balanced XLR/TRS inputs plus customizable op-amps, it offers flexible integration and personalized sound tuning in a sleek, space-saving metal chassis.

Specifications

ASIN	B0D31M3DXY
Best Sellers Rank	#16,806 in Electronics ( See Top 100 in Electronics ) #81 in Audio Component Amplifiers
Brand Name	Fosi Audio
Customer Reviews	4.1 4.1 out of 5 stars (412)
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
Number of Items	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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241157CFA

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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