---
product_id: 593516485
title: "– Fosi Audio ZA3 Balanced Stereo Amplifier Home Audio Component Mini 2 Channel Mono Amp TPA3255 for Subwoofer Desktop Home Theater Bookshelf Tower Floorstanding Passive Speakers with 48V Power Supply"
brand: "fosi audio"
price: "€ 178.97"
currency: EUR
in_stock: true
reviews_count: 10
category: "Fosi Audio"
url: https://www.desertcart.ie/products/593516485-fosi-audio-za3-balanced-stereo-amplifier-home-audio-component-mini
store_origin: IE
region: Ireland
---

# 235W max mono power Balanced XLR/TRS input Advanced heat dissipation – Fosi Audio ZA3 Balanced Stereo Amplifier Home Audio Component Mini 2 Channel Mono Amp TPA3255 for Subwoofer Desktop Home Theater Bookshelf Tower Floorstanding Passive Speakers with 48V Power Supply

**Brand:** fosi audio
**Price:** € 178.97
**Availability:** ✅ In Stock

## Summary

> 🎶 Unleash studio-grade power in a compact form—your speakers' new best friend!

## Quick Answers

- **What is this?** – Fosi Audio ZA3 Balanced Stereo Amplifier Home Audio Component Mini 2 Channel Mono Amp TPA3255 for Subwoofer Desktop Home Theater Bookshelf Tower Floorstanding Passive Speakers with 48V Power Supply by fosi audio
- **How much does it cost?** € 178.97 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/593516485-fosi-audio-za3-balanced-stereo-amplifier-home-audio-component-mini)

## 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:** Enhanced ventilation and dust covers keep your amp running stable during marathon listening sessions.
- • **Dual-Mode Powerhouse:** Switch effortlessly between 155W stereo and a booming 235W mono output for ultimate audio flexibility.
- • **Custom Sound Sculpting:** Swap op-amps to tailor your audio signature—because your sound should be as unique as you are.
- • **Pro-Grade Connectivity:** Balanced XLR and 1/4" TRS inputs slash noise and interference for crystal-clear sound.
- • **Audiophile-Approved Components:** Premium TPA3255 chip with Japanese and German capacitors delivers pristine clarity and ultra-low distortion.

## Overview

The Fosi Audio ZA3 is a compact, dual-mode Class-D amplifier delivering up to 235W in mono and 155W in stereo. Featuring balanced XLR/TRS inputs, premium audiophile components, and advanced heat dissipation, it offers exceptional sound clarity with low noise. Its op-amp rolling capability allows personalized sound tuning, making it a versatile powerhouse for desktop, home theater, and bookshelf speakers.

## Description

Buy Fosi Audio ZA3 Balanced Stereo Amplifier Home Audio Component Mini 2 Channel Mono Amp TPA3255 for Subwoofer Desktop Home Theater Bookshelf Tower Floorstanding Passive Speakers with 48V Power Supply online on desertcart.ae at best prices. ✓ Fast and free shipping ✓ free returns ✓ cash on delivery available on eligible purchase.

Review: Great Pint Sized Amplifier ! - What a monster amplifier in a pint sized metal box. Get two & go mono with 250 watts per channel and watch those those tough speakers rise from the dead.. Add some Burson Audio Vivid V7 Op-Amps in it and man this thing becomes a beast with all that 48v d.c power input ! At this price it's crazy how they make it possible to get so much !
Review: Great HiFi democratized! - These small class D amps are exceptional value for money! I have amps that cost 20 times more than the ZA3 but does not deliver even 5 times the performance. I tried this (just for fun) with my power hungry Sonus Faber Sonnetto I bookshelves and it managed to make them sing beautifully up to the max volumes I listen to (70-80 db). I use two of them in mono mode to power my desktop speakers mainly for nearfield listening. The only thing I miss is a high low pass filter for the sub output. This is honestly exceptionally priced HiFi! The performance makes the price a steal! And I am so inclined to build an entire system of Fosi products just to compare its performance to price against my other ridiculously priced higher mid-range systems, which I 'm sure this will give a run for the money! I heard some premium and expensive high-end amps, and this definitely does not compete with them (I mean, come on if you're expecting this!), but for mid-range and other entry level products, I believe this thing is a certified LGK!

## Features

- Dual-Mode Innovation: This new generation mini amplifier offers both stereo and mono modes, adapts flexibly to your diverse needs, allowing seamless mode switching. In stereo mode, it delivers a robust output of up to 155W, while in mono mode, the power soars to a maximum of 235W. Pair two ZA3 units in mono configuration to create a powerful audio system, significantly enhancing your listening experience.
- Richer Connectivity: Debut amplifier with balanced input and trigger in, the ZA3 features a balanced combo audio signal input connector supporting both XLR and 1/4" TRS plugs. This design minimizes interference and reduces noise floor. The 12V trigger-in connector enables synchronization with other devices, streamlining the process of turning on/off without individual operations.
- Audiophile-Grade Components: The ZA3 features the TPA3255 high-end Class-D amp chip and utilizes premium Japanese NCC, ELNA, and German WIMA capacitors, and Japanese Sumida inductors for exceptional audio quality. With a SINAD rating of up to 89dB, an SNR of up to 106dB, and a low noise floor of only 150μV, it delivers exceptional clarity and low distortion.
- Advanced Heat Dissipation: Based on V3's groundbreaking heat dissipation design, we upgraded ZA3's cooling system by featuring a larger chassis, moving vents to the sides, and adding dust covers to achieve better ventilation for a sustained and stable high power output.
- Enhanced Scalable Fun: Personalize your audio experience with the op-amp rolling feature! The ZA3 stocks five swappable op-amps for left and right channel outputs, balanced input, and subwoofer output. Experiment with compatible DIP8 dual op-amps such as Sparkos SS3602, MUSES02, OPA2604, OPA2134PA, OP249, AD827, RM4558, LM4562, LME49720HA, etc. to fine-tune your sound to perfection.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CLP4T5L7 |
| Best Sellers Rank | #17,072 in Electronics ( See Top 100 in Electronics ) #36 in Home Audio Amplifiers |
| Department | All Ages |
| Item model number | ZA3 |
| Language | English |
| Manufacturer | Fosi Audio |
| Product Dimensions | 15.49 x 18.39 x 5.08 cm; 1.2 kg |

## Product Details

- **Item dimensions L x W x H:** 15.5 x 18.4 x 5.1 centimeters
- **Manufacturer:** Fosi Audio
- **Maximum supply voltage:** 48 Volts (DC)
- **Minimum supply voltage:** 24 Volts (DC)
- **Voltage:** 48 Volts

## Images

![– Fosi Audio ZA3 Balanced Stereo Amplifier Home Audio Component Mini 2 Channel Mono Amp TPA3255 for Subwoofer Desktop Home Theater Bookshelf Tower Floorstanding Passive Speakers with 48V Power Supply - Image 1](https://m.media-amazon.com/images/I/51XgZUlMEQL.jpg)

## Questions & Answers

**Q: Is it possible to use the trigger out from the Fosi Audio ZD3 to two pieces of ZA3 amplifiers?**
A: Yes, use a dual 3.5mm male splitter cable to trigger the ZA3 to switch on synchronously.

**Q: How to set up a system using two ZA3 units in mono mode?**
A: - Connect the RCA (XLR) cables to the right-channel RCA (XLR) input ports of the two ZA3 units, and link the speaker wires to the right-channel binding posts.

**Q: ZA3 recommendations for replacing op-amps in mono mode?**
A: If you're using RCA mode, please replace only the right op-amp. For XLR mode, swap the right and XLR channel op-amps.

**Q: No front light on ZA3 though there is light on the ac adapter.**
A: Long press the volume button for 2 seconds to power it on.

**Q: The power on LED light on my ZA3 is dead.**
A: Check if the LED is misaligned with the front panel hole, especially if the op-amp was recently changed. Misalignment could cause the LED not to be visible through the case.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great Pint Sized Amplifier !
*by R***. on 8 December 2025*

What a monster amplifier in a pint sized metal box. Get two & go mono with 250 watts per channel and watch those those tough speakers rise from the dead.. Add some Burson Audio Vivid V7 Op-Amps in it and man this thing becomes a beast with all that 48v d.c power input ! At this price it's crazy how they make it possible to get so much !

### ⭐⭐⭐⭐⭐ Great HiFi democratized!
*by Y***N on 4 May 2025*

These small class D amps are exceptional value for money! I have amps that cost 20 times more than the ZA3 but does not deliver even 5 times the performance. I tried this (just for fun) with my power hungry Sonus Faber Sonnetto I bookshelves and it managed to make them sing beautifully up to the max volumes I listen to (70-80 db). I use two of them in mono mode to power my desktop speakers mainly for nearfield listening. The only thing I miss is a high low pass filter for the sub output. This is honestly exceptionally priced HiFi! The performance makes the price a steal! And I am so inclined to build an entire system of Fosi products just to compare its performance to price against my other ridiculously priced higher mid-range systems, which I 'm sure this will give a run for the money! I heard some premium and expensive high-end amps, and this definitely does not compete with them (I mean, come on if you're expecting this!), but for mid-range and other entry level products, I believe this thing is a certified LGK!

### ⭐⭐⭐⭐⭐ Happy with the sound
*by R***J on 17 July 2025*

Can’t get better than this for the price.

## Frequently Bought Together

- Fosi Audio ZA3 Balanced Stereo Amplifier Home Audio Component Mini 2 Channel Mono Amp TPA3255 for Subwoofer Desktop Home Theater Bookshelf Tower Floorstanding Passive Speakers with 48V Power Supply
- VANDESAIL XLR Cables, 3ft 2 Pack Microphone Cable, XLR Male to Female Balanced Microphone Cord 3 pin, 3 Foot Short mic Cord Oxygen-Free Copper (OFC) Nylon Braided

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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-03-08*