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

🔗XLR & RCA balanced inputs

🧊Full-body heat dissipation

55039 kr

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Description

🎶 Elevate your sound game — power, precision, and pristine clarity in one sleek amp!

COOL RELIABLE - Advanced chassis cooling keeps your amp running stable during marathon listening sessions.
POWERHOUSE PRECISION - Unleash 240W of crystal-clear Class-D power for your ultimate HiFi setup.
AUDIOPHILE GRADE BUILD - Premium Nichicon, ELNA, WIMA caps & TPA3255 chip for pristine audio fidelity.
PLUG PLAY FLEXIBILITY - Seamlessly switch between balanced XLR/TRS and RCA inputs with gain control & op-amp upgrades.
REVOLUTIONARY PFFB TECH - Experience distortion-free sound with cutting-edge Post-Filter Feedback innovation.

The Fosi Audio V3 Mono is a compact, high-performance Class-D amplifier delivering 240W at 4Ω, designed for audiophiles building multi-channel home theater or HiFi systems. Featuring innovative PFFB technology to minimize distortion, premium components like the TPA3255 chip and Japanese capacitors, and advanced heat dissipation for stable long-term use. It supports versatile input options (XLR, TRS, RCA) with gain selection and customizable op-amps, making it a flexible powerhouse for professional-grade audio setups.

Specifications

ASIN	B0D31M3DXY
Best Sellers Rank	15,722 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 55 in Hi-Fi Amplifiers
Brand	Fosi Audio
Country Of Origin	China
Customer Reviews	4.2 4.2 out of 5 stars (506)
Included Components	48V Power supply
Item Dimensions	14.5 x 10.8 x 4 centimetres
Item Weight	750 Grams
Manufacturer	Fosi Audio
Manufacturer Part Number	un pezzo
Material	Metal
Maximum Supply Voltage	48 Volts
Minimum Supply Voltage	32 Volts
Model Number	V3 Mono
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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55039 kr

Duties & taxes included

In stock

Sold byAmazon IcelandDelivered 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 Iceland.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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