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

Product ID: 641781472

Details

Item dimensions L x W x H
14.5 x 10.8 x
Manufacturer
Fosi Audio
Maximum supply voltage
48 Volts
Minimum supply voltage
32 Volts
Voltage
230 Volts

⚡240W peak power @4Ω

🔗RCA/XLR balanced & single-ended inputs

🧊Advanced full-body heat dissipation

€ 358.93

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Description

🎶 Power, Precision, and Prestige — Amplify Your Audio Game!

REVOLUTIONARY PFFB TECH - Experience ultra-low distortion and pristine sound clarity with cutting-edge Post-Filter Feedback innovation.
COOL RELIABLE OPERATION - Full-body heat dissipation and dual side vents keep your amp running stable during marathon listening sessions.
AUDIOPHILE GRADE COMPONENTS - Premium Japanese Nichicon & Sumida parts plus German WIMA caps ensure studio-level audio fidelity.
PURE POWERHOUSE PERFORMANCE - Unleash 240W of crystal-clear Class D amplification for your ultimate home theater or HiFi setup.
FLEXIBLE PRO GRADE CONNECTIVITY - Seamlessly switch between RCA, XLR, and ¼” TRS inputs with gain control and customizable op-amps.

The Fosi Audio V3 Mono is a compact yet powerful 240W Class D monoblock amplifier designed for audiophiles and home theater enthusiasts. Featuring innovative PFFB technology, premium Japanese and German components, and advanced cooling, it delivers ultra-low distortion and high-fidelity sound. With versatile RCA, XLR, and ¼” TRS inputs plus customizable op-amps, it offers professional-grade flexibility in a sleek, minimalist design.

Specifications

ASIN	B0D31M3DXY
Best Sellers Rank	26,863 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 124 in Hi-Fi Amplifiers
Brand	Fosi Audio
Country Of Origin	China
Customer Reviews	4.3 out of 5 stars 495 Reviews
Included Components	48V Power supply
Item Dimensions	14.5 x 10.8 x 4 centimetres
Item Weight	750 Grams
Item dimensions L x W x H	14.5 x 10.8 x 4 centimetres
Manufacturer	Fosi Audio
Manufacturer Part Number	un pezzo
Material	Metal
Maximum Supply Voltage	48 Volts
Maximum supply voltage	48 Volts
Minimum Supply Voltage	32 Volts
Minimum supply voltage	32 Volts
Model Number	V3 Mono
Mounting Type	Surface Mount
Mounting type	Surface Mount
Number of Channels	1
Number of Items	1
Operating Temperature	23 Degrees Celsius
Output Power	240 Watts
Package Type Name	cardboard box
Specification Met	CE
Supply Current	5 Amps
Voltage	230 Volts

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€ 358.93

Duties & taxes included

In stock

Sold byAmazon CroatiaDelivered 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 Croatia.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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