---
product_id: 641781472
title: "– 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"
brand: "fosi audio"
price: "1602.82 DT"
currency: TND
in_stock: true
reviews_count: 13
category: "Fosi Audio"
url: https://www.desertcart.tn/products/641781472-v3-mono-power-amplifier-for-home-audio-speakers-mini-monoblock
store_origin: TN
region: Tunisia
---

# 240W peak power @4Ω Advanced full-body heat dissipation Supports XLR/RCA inputs + customizable op-amps – 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

**Brand:** fosi audio
**Price:** 1602.82 DT
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** – 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 by fosi audio
- **How much does it cost?** 1602.82 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/641781472-v3-mono-power-amplifier-for-home-audio-speakers-mini-monoblock)

## Best For

- fosi audio enthusiasts

## Why This Product

- Trusted fosi audio brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Cool Under Pressure:** Innovative full-body heat dissipation keeps your amp running stable and reliable during marathon listening sessions.
- • **Powerhouse Precision:** Unleash 240W of clean, distortion-free Class-D power for your ultimate HiFi setup.
- • **Flexible Connectivity:** Seamlessly switch between balanced XLR and RCA inputs with gain control for perfect integration.
- • **Custom Sound Signature:** Swap out stock op-amps to tailor your audio experience — from warm to ultra-detailed tones.
- • **Audiophile-Grade Components:** Premium TPA3255 chip with Japanese Nichicon & German WIMA capacitors for crystal-clear sound fidelity.

## Overview

The Fosi Audio V3 Mono is a compact, high-performance Class-D amplifier delivering up to 240W at 4Ω, designed for audiophiles building multi-channel home theater or HiFi systems. Featuring cutting-edge PFFB technology, premium components, and advanced heat dissipation, it ensures low distortion and high fidelity. With versatile XLR and RCA inputs plus customizable op-amps, it offers both power and flexibility in a sleek, durable metal chassis.

## Description

Product Description Fosi Audio V3 Mono Mini Power Amplifier A debut Class D audio amplifier with PFFB technology to significantly improve sound purity and system efficiency, offering a flexible solution to your home audio system. Continuation of Co-Creation Engineered for Audiophiles - Optimal Choice for Home Audio Systems In 2023, following the launch of the V3 stereo amplifier, we received numerous valuable suggestions and feedback from our global audio lovers. We listen intently, record diligently, and develop with dedication, ultimately striving to transform your suggestions and ideas into reality—the V3 mono. Input: RCA, XLR, ¼" TRS Output: Passive Speaker (supports banana plug or bare wire connection) SINAD: XLR--101dB; RCA--93dB; SNR: ≥123dB Rated Power Output: 48V/5A 240W@4Ω; 32V/5A 100W@4Ω Post-Filter Feedback Technology Integrated Significantly reduces distortion, and enhances linearity and frequency response to get HiFi sound. Compact Yet Powerful Crafts an immersive sound experience, satisfying your craving for superior musical quality. Accurate Imaging with Zero Crosstalk Enhances stereo depth and soundstage accuracy for a purer audio experience. Easily Replaceable DIP8 Dual Discrete Op-amps Meeting your pursuit of a personalized audio experience. Provides You with Flexible Connectivity Options Effortlessly switched by a toggle switch, easily adapted for both home and professional scenarios. Advanced Cooling Design Guarantees long-term efficient operation of the amp, prevents overheating. With Minimalist Design Effortlessly integrates into various settings like home theater, study room, desktop, and studios. Automatic Signal Sensing Enters standby after 10 minutes of no signal input, effectively reducing power consumption. NICHICON Caps, Japanese Ensure superior sound clarity, longevity, and stable electrical performance, enhancing the fidelity of audio reproduction. WIMA Caps, German Provide exceptional sound quality and signal stability, greatly enhancing the audio experience. Sumida Inductor, Japanese Offers superior signal purity and noise reduction, elevating the amplifier's sound performance. ELNA Caps, Japan Ensure enhanced audio clarity and stability, contributing to a richer sound experience. Comparison Chart V3 MONO Type Monoblock Amp Rated Power Output 240W x 1 Input RCA+XLR (¼”TRS) Output Passive Speaker Treble& Bass Control THD <0.006% SNR ≥123dB Learn More V3 MONO Type Monoblock Amp Rated Power Output 240W x 1 Input RCA+XLR (¼”TRS) Output Passive Speaker Treble& Bass Control THD <0.006% SNR ≥123dB ZA3 Type 2.0 CH Balanced Amp Rated Power Output 180W x 2 / 235W x 1 Input RCA+XLR (¼”TRS) Output Passive SPK +Sub-out Treble& Bass Control THD <0.006% SNR ≥106dB Learn More ZA3 2.0 CH Balanced Amp 180W x 2 / 235W x 1 Passive SPK +Sub-out ≥106dB V3 Type 2.0 CH Amp Rated Power Output 230W x 2 Input RCA Output Passive SPK +Pre-out Treble& Bass Control THD <0.003% SNR ≥110dB Learn More V3 2.0 CH Amp 230W x 2 RCA Passive SPK +Pre-out <0.003% ≥110dB BT20A PRO Type Bluetooth 2.0 CH Amp Rated Power Output 220W x 2 Input Bluetooth + RCA Output Passive Spk+Pre-out Treble& Bass Control THD ≤ 0.03% SNR ≥ 108dB Learn More BT20A PRO Bluetooth 2.0 CH Amp 220W x 2 Bluetooth + RCA Passive Spk+Pre-out ≤ 0.03% ≥ 108dB TB10D Type 2.0 CH Amp Rated Power Output 230W x 2 Input RCA Output Passive Speakers Treble& Bass Control THD ≤ 0.3% SNR ≥ 90dB Learn More TB10D Passive Speakers ≤ 0.3% ≥ 90dB

Review: Good unit, but heat issues. - Wasn't sure if these were going to be a 4 or 5 star review. As other commentators have said, they do run hot; burning hot, over 60C. They sit at 40C in standby. I worry about the heat affecting electrolytic capacitor lifespan. I bought four for my bi-amping project, (I was replacing my 4 channel 3886 hybrid 'scraplifier') and the quiescent current draw must have been enormous. So, on advice, I replaced the 48v psu (x4) with a 32v psu (x4). It added an extra hundred quid to the project, but I was eight hundred in to it by now, so it seemed rude not to. And, WOW, I'm still producing 100w (x4) into 8 ohms. And with a usb dac, everything reaches FSD (full volume) at the same point. And now they run 'cool' at about 40C in-use and just above room temp in standby. Sound? Acoustically invisible. Confidence? Much better. Value for money?...Well, it works for me. You'll have to decide for yourself. Four and a half stars.
Review: Believe the hype, these Fosi v3 monoblocks are exceptional. - I bought 4 of these Fosi v3 monoblocks with 2 x 48volt/10amp power supply units. They are being used to drive Tannoy XT8F revolution tower speakers in a vertical mono/bi-amp mode ( i.e. each speaker is connected to 2 monoblocks with a shared PSU ). After an initial 24 hour burn in, they opened up to produce a wonderfully transparent, dynamic and powerful sound. The treble is clean without edge or grain, the midrange is very clear with excellent low level detail resolution and the bass is well controlled, defined, extended and surprisingly hard hitting. The overall tonal balance is quite neutral with just a hint of treble forwardness. The Fosi v3 small form factor, belies its capability when producing a very large soundstage with terrific focus on, and the space between, the musical elements within it. Plus the stereo imagery is precise with good centre focus, coherence and decent depth. I was originally sceptical about the V3 mnbks when I heard, read and saw ( on You tube ) the rave reviews about them. Now I have confirmed for myself, their exceptional performance for the money. Compared to my 2 other, much more expensive power amps, from Marantz and Emotiva, they more than hold their own. Highly recommended. Additional information:- Everything said about the v3 monoblocks remains the same, ( if anything they're even better sounding than when they were first reviewed, due to slightly less treble forwardness ). However they do become hot during use. Therefore I recommend using a low noise fan ( if you can't put them on/in a well ventilated shelf/cabinet ). DON'T stack them on top of each other without adding feet to separate them.

## Features

- Mini Monoblock Amplifier: Crafted for HiFi audiophiles, the V3 Mono allows you to drive a single passive speaker with one amp, delivering up to 240W @4Ω of rated power. It offers the flexibility to build your home audio 2/3/4/5-channel system effortlessly. The V3 Mono can serve as a power amplifier for multi-channel AVRs, complementing the output power to easily drive high-power speakers in home theater systems.
- Innovative Cutting-Edge Technology: Fosi Audio has achieved a technological breakthrough through independent research and development by applying PFFB (Post-Filter Feedback) technology to the V3 Mono for the first time. This effectively overcomes the common load dependency issues of Class-D amplifiers, improving distortion and enhancing frequency response, thereby significantly enhancing sound quality and performance.
- Audiophile-Grade Components: The V3 Mono incorporates the high-end TPA3255 Class-D amp chip, paired with well-known components such as Japanese Nichicon filter capacitors, ELNA capacitors, German WIMA capacitors, and Japanese Sumida inductors, etc. Additionally, it features an upgraded four-layer PCB. This combination not only ensures high power output but also achieves a THD as low as 0.006%, a SINAD of 101dB, and an SNR of 123dB.
- Advanced Cooling: Utilizing Fosi Audio's pioneering full-body heat dissipation design, the TPA3255 amplifier chip is placed at the bottom and tightly integrated with the chassis, allowing heat to be effectively dissipated through the casing. Coupled with dual side ventilation holes that enhance internal airflow, this ensures the V3 Mono can deliver stable, high-power output over extended periods.
- User-Friendly Design: Supports both XLR/¼" TRS balanced and RCA single-ended(with gain selection) inputs, with an easy toggle switch for selection. Additionally, it features an auto power/signal sensing mode to enhance energy efficiency. You can also customize your preferred sound signature by replacing the stock NE5532 op-amps, supporting DIP8 dual discrete op-amps such as Sparkos SS3602, MUSES02, OPA2604, Burson V5i, V6, V7, and more.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0D31M3DXY |
| Best Sellers Rank | 21,716 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 100 in Hi-Fi Amplifiers |
| Brand | Fosi Audio |
| Country Of Origin | China |
| Customer Reviews | 4.4 out of 5 stars 436 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 |
| Operating Temperature | 23 Degrees Celsius |
| Output Power | 240 Watts |
| Package Type Name | cardboard box |
| Specification Met | CE |
| Supply Current | 5 Amps |
| Voltage | 230 Volts |

## Product Details

- **Item dimensions L x W x H:** 14.5 x 10.8 x 4 centimetres
- **Manufacturer:** Fosi Audio
- **Maximum supply voltage:** 48 Volts
- **Minimum supply voltage:** 32 Volts
- **Voltage:** 230 Volts

## Images

![– 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 - Image 1](https://m.media-amazon.com/images/I/51UT2mXOVcL.jpg)
![– 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 - Image 2](https://m.media-amazon.com/images/I/71entDLehbL.jpg)
![– 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 - Image 3](https://m.media-amazon.com/images/I/71yYToMk-XL.jpg)
![– 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 - Image 4](https://m.media-amazon.com/images/I/61l+c-coNEL.jpg)
![– 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 - Image 5](https://m.media-amazon.com/images/I/716xLT127nL.jpg)

## Questions & Answers

**Q: No sound change after switching the gain switch?**
A: 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.)

**Q: Would the noise still occur if no audio input cables are connected?**
A: Try replacing the audio source, using well-shielded audio cables, and switching to a different speaker.

**Q: Doesn't work in standby mode?**
A: 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.

**Q: V3 MONO don't have volume control or knobs?**
A: Yes. V3 MONO is a pure power amplifier, it is recommended to use it with a DAC, preamplifier, or player with volume control.

**Q: What's the V3 MONO?**
A: V3 MONO is a mono channel amplifier. To achieve 2 channel amplifier effect, two V3 MONO are needed to connect two speakers.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good unit, but heat issues.
*by P***R on 17 March 2025*

Wasn't sure if these were going to be a 4 or 5 star review. As other commentators have said, they do run hot; burning hot, over 60C. They sit at 40C in standby. I worry about the heat affecting electrolytic capacitor lifespan. I bought four for my bi-amping project, (I was replacing my 4 channel 3886 hybrid 'scraplifier') and the quiescent current draw must have been enormous. So, on advice, I replaced the 48v psu (x4) with a 32v psu (x4). It added an extra hundred quid to the project, but I was eight hundred in to it by now, so it seemed rude not to. And, WOW, I'm still producing 100w (x4) into 8 ohms. And with a usb dac, everything reaches FSD (full volume) at the same point. And now they run 'cool' at about 40C in-use and just above room temp in standby. Sound? Acoustically invisible. Confidence? Much better. Value for money?...Well, it works for me. You'll have to decide for yourself. Four and a half stars.

### ⭐⭐⭐⭐⭐ Believe the hype, these Fosi v3 monoblocks are exceptional.
*by P***E on 11 October 2024*

I bought 4 of these Fosi v3 monoblocks with 2 x 48volt/10amp power supply units. They are being used to drive Tannoy XT8F revolution tower speakers in a vertical mono/bi-amp mode ( i.e. each speaker is connected to 2 monoblocks with a shared PSU ). After an initial 24 hour burn in, they opened up to produce a wonderfully transparent, dynamic and powerful sound. The treble is clean without edge or grain, the midrange is very clear with excellent low level detail resolution and the bass is well controlled, defined, extended and surprisingly hard hitting. The overall tonal balance is quite neutral with just a hint of treble forwardness. The Fosi v3 small form factor, belies its capability when producing a very large soundstage with terrific focus on, and the space between, the musical elements within it. Plus the stereo imagery is precise with good centre focus, coherence and decent depth. I was originally sceptical about the V3 mnbks when I heard, read and saw ( on You tube ) the rave reviews about them. Now I have confirmed for myself, their exceptional performance for the money. Compared to my 2 other, much more expensive power amps, from Marantz and Emotiva, they more than hold their own. Highly recommended. Additional information:- Everything said about the v3 monoblocks remains the same, ( if anything they're even better sounding than when they were first reviewed, due to slightly less treble forwardness ). However they do become hot during use. Therefore I recommend using a low noise fan ( if you can't put them on/in a well ventilated shelf/cabinet ). DON'T stack them on top of each other without adding feet to separate them.

### ⭐⭐⭐⭐⭐ BIG sound from small boxes
*by M***I on 10 January 2026*

Beautiful little boxes with a BIG sound. I have upgraded the opamps to VirtualHifi Supersonic V1, 4 of them at €25 each, and the sound is amazing. Paired with a set of Wharfdale 12.3 I don’t need a sub (if you like normal music with normal bass levels). My go-to tracks for testing are Bruno Mars, Versace On the Floor, and Alfie Boe, Bring Him Home. Unbelievable bass control on the Bruno Mars track, deep and controlled, not boomy. For Alfie Boe, it sounds like you are there watching the performance live. Like all hifi reviews it is purely subjective and you should listen yourself to find out if it is right for you. The best thing about buying on Amazon is you can send it back if you don’t like it.

## Frequently Bought Together

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- Fosi Audio ZD3 Desktop DAC Preamp, Fully Balanced Digital to Analog Audio Converter with ES9039Q2M for Home Stereo Amplifier, Bluetooth/USB/Optical/Coax/TV HDMI ARC Input, XLR/RCA Output with Remote

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-06-01*