---
product_id: 157629410
title: "Fosi Audio BT20A Pro 300W x2 TPA3255 Bluetooth 5.0 Home Audio Stereo 2 Channel Amplifier Receiver Mini Hi-Fi Class D Upgraded Integrated Amp for Speakers with Bass Treble Control"
brand: "fosi audio"
price: "€ 321.69"
currency: EUR
in_stock: true
reviews_count: 9
category: "Fosi Audio"
url: https://www.desertcart.hr/products/157629410-fosi-audio-bt20a-pro-300w-x2-tpa3255-bluetooth-5-0
store_origin: HR
region: Croatia
---

# 300W x2 Power Output Bluetooth 5.0 with Memory Pairing SNR≥108dB & THD≤0.005% Audio Clarity Fosi Audio BT20A Pro 300W x2 TPA3255 Bluetooth 5.0 Home Audio Stereo 2 Channel Amplifier Receiver Mini Hi-Fi Class D Upgraded Integrated Amp for Speakers with Bass Treble Control

**Brand:** fosi audio
**Price:** € 321.69
**Availability:** ✅ In Stock

## Summary

> 🎶 Elevate your sound game—because ordinary audio just won’t do.

## Quick Answers

- **What is this?** Fosi Audio BT20A Pro 300W x2 TPA3255 Bluetooth 5.0 Home Audio Stereo 2 Channel Amplifier Receiver Mini Hi-Fi Class D Upgraded Integrated Amp for Speakers with Bass Treble Control by fosi audio
- **How much does it cost?** € 321.69 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/157629410-fosi-audio-bt20a-pro-300w-x2-tpa3255-bluetooth-5-0)

## 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

- • **Compact Yet Mighty:** Sleek, space-saving design packs high-end Hi-Fi power into a minimalist footprint.
- • **Powerhouse Performance:** Dual 300W channels deliver room-filling, crystal-clear sound that commands attention.
- • **Seamless Bluetooth 5.0:** Effortless pairing with memory function and low-latency streaming keeps you connected and in sync.
- • **Precision Sound Control:** Fine-tune bass and treble with intuitive knobs for a perfectly balanced listening experience.
- • **Audiophile Customization:** Swap out Op-Amps to craft your signature sound profile—because your ears deserve bespoke audio.

## Overview

The Fosi Audio BT20A Pro is a compact, high-efficiency Class D amplifier featuring dual 300W output channels powered by the TI TPA3255 chip. It offers advanced Bluetooth 5.0 connectivity with memory pairing, ultra-low distortion (THD≤0.005%), and high signal-to-noise ratio (≥108dB). Customizable with interchangeable Op-Amps and manual bass/treble controls, it delivers tailored, premium sound for discerning listeners in a sleek, space-conscious design.

## Description

Experience exceptional sound with this Bluetooth amplifier's 300W x2 power, customizable options, and interchangeable op-amps for a tailored listening experience.

Review: Incredible! - Incredible product, the sound quality is great over Bluetooth and the range is unbelievable. There’s also very little delay in the playback, so watching videos are no issue with the audio syncing nicely. The whole unit is so small which was very important for my space, yet performs well. I’m not an audiophile but I can definitely say the average consumer would be thrilled by the output, and not to mention the value for money over the competition.
Review: Great power, lovely device - I love this thing, and can't believe how loud it is! So one thing to mention is that you can't get the full 300w of power with the supplied power supply (32v) - they sell a 48v one I think on desertcart if you need that. Yet, the room I am in is 5m by 3.5m, and I don't think I'll ever push the thing past 1/2 way. Most of the time, considerably less than that. So the above does not bother me. It is powering some Cambridge Audio SX-50, and collectively they sound amazing! I briefly had some Edifier active speakers before this (cheaper, but not by that much), but sound comparison wise, there's no contest. So this is a pretty simple device - no remote, and not a lot going on controls wise, but having the two inputs (one physical, and the other bluetooth) is perfect for my needs. And the manual treble and bass are useful at times too. I've not got a sub plugged into this - for my needs, I don't think I need it (the speakers are pretty good without), so can't comment on that, but may add something in the future, so good to have the option. I'm using this for armature music production, and also for listening to music as I work, and its great for both!

## Features

- TI TPA3255 Chip Amplifier with 300 Watts x 2 Power Output: Advanced feedback design and high-speed gate driver error correction for efficient and high-quality audio performance, with low idle losses of <2.5W.
- Upgraded High-Efficiency: A significant upgrade from the BT20A amplifier with replaceable Op-Amps for customized. You can replace the two plug-in NE5532 Op-Amps with LME49720HA/MUSES02/OPA2604AP/OPA2134PA/LM4562/NJM4556AD Op-Amps to achieve a unique sound quality. With SNR≥108dB and THD≤0.005%.
- Enhanced Bluetooth 5.0 Connectivity: The Bluetooth pair can be cleared by pressing and holding the volume control for five seconds. In addition, it has a memory Function for Easy Pairing and Alert Tone.
- Customizable Sound with a Wide Range of Bass and Treble Controls: The BT20A Pro home audio amplifier offers a unique design for sound control. Enjoy original sound without effects by setting treble and bass effects to the middle point.
- What you Get: BT20A Pro Power Amplifier x1, Bluetooth Antenna x1, 32V 5A Power Adapter x1, AC Cord x1, User Manual x1, our worry-free 24-month warranty, and friendly customer service.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07JVFY27T |
| Best Sellers Rank | 3,464 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 3 in Hi-Fi Amplifiers 4,159 in Climate Pledge Friendly: Shop All |
| Guaranteed software updates until | unknown |
| Item model number | BT20A PRO |
| Language | English |
| Manufacturer | Fosi Audio |
| Product Dimensions | 14.2 x 10.7 x 0.41 cm; 1.1 kg |

## Product Details

- **Item dimensions L x W x H:** 14.2 x 10.7 x 0.4 centimetres
- **Manufacturer:** Fosi Audio
- **Maximum supply voltage:** 32 Volts (DC)
- **Minimum supply voltage:** 32 Volts
- **Voltage:** 32 Volts

## Images

![Fosi Audio BT20A Pro 300W x2 TPA3255 Bluetooth 5.0 Home Audio Stereo 2 Channel Amplifier Receiver Mini Hi-Fi Class D Upgraded Integrated Amp for Speakers with Bass Treble Control - Image 1](https://m.media-amazon.com/images/I/61ne1lo34ML.jpg)

## Available Options

This product comes in different **Color** options.

## Questions & Answers

**Q: Will you be making the bt20a pro available on amazon with the 48v power supply?**
A: Hi, BT20A Pro is available with the 48v power supply.

**Q: Is amp a similar quality to the tangent ampster btii?**
A: Yes,or better,think this is the best sub £100 BY amplifier on the market,has input for cd or turntable and a sub woofer out,great item

**Q: How do you switch between bluetooth and RCA inputs if there's no selector switch?**
A: Push the volume knob, however this amp auto defaults to Bluetooth if you have the source bluetooth switched on. So to select RCA connection turn Bluetooth off on the source.

**Q: Does it come with a power supply?**
A: Yes, almost half of the size of the amp itself

## Customer Reviews

### ⭐⭐⭐⭐⭐ Incredible!
*by L***M on 7 September 2025*

Incredible product, the sound quality is great over Bluetooth and the range is unbelievable. There’s also very little delay in the playback, so watching videos are no issue with the audio syncing nicely. The whole unit is so small which was very important for my space, yet performs well. I’m not an audiophile but I can definitely say the average consumer would be thrilled by the output, and not to mention the value for money over the competition.

### ⭐⭐⭐⭐⭐ Great power, lovely device
*by R***K on 5 October 2025*

I love this thing, and can't believe how loud it is! So one thing to mention is that you can't get the full 300w of power with the supplied power supply (32v) - they sell a 48v one I think on Amazon if you need that. Yet, the room I am in is 5m by 3.5m, and I don't think I'll ever push the thing past 1/2 way. Most of the time, considerably less than that. So the above does not bother me. It is powering some Cambridge Audio SX-50, and collectively they sound amazing! I briefly had some Edifier active speakers before this (cheaper, but not by that much), but sound comparison wise, there's no contest. So this is a pretty simple device - no remote, and not a lot going on controls wise, but having the two inputs (one physical, and the other bluetooth) is perfect for my needs. And the manual treble and bass are useful at times too. I've not got a sub plugged into this - for my needs, I don't think I need it (the speakers are pretty good without), so can't comment on that, but may add something in the future, so good to have the option. I'm using this for armature music production, and also for listening to music as I work, and its great for both!

### ⭐⭐⭐⭐⭐ Give it time to burn in then its 5 stars
*by P***F on 26 July 2024*

Used as a desktop system with Mp3 player (wired) and a soundblaster dongle from my laptop. I have a set of vintage Canton 4 ohm speakers that are efficient connected with banana plugs and pure copper wire. I am using the 32v supplied power supply. I almost returned this as when I first started using it the treble range sounded distorted and overall the amp sounded thin. Fast forward to around 20 hours use and the little Fosi is revealing itself to be a very capable unit. The separation, clarity and reserves of power are now all evident. The control through the range is now very good , excellent bass and clear treble. The tone controls work well allowing acurate amounts of adjustment if needed. Connection: Sorry I don't use bluetooth but I expect it works well. The 2 phono sockets are fine to use with whatever you plug in. The 3.5mm pre out: Disappointed with this it would not send anything to my powered sub, not a deal breaker but research on the net shows this is a common complaint. Fosi should have put a dedicated sub out for this. The build quality is fine and with the 32v supply only ever gets slightly warm. I have also read that the alternative 48v supply causes the amp to run quite hot. The output for me is enough and I can listen clearly in the room away from my desk. Apart from the issue with the pre-out I can still give 5 stars due to the overal qualities of this little amp.

## Frequently Bought Together

- Fosi Audio BT20A Pro Bluetooth 5.0 Amplifier, 300W x2 Wireless Amp, TPA3255 2 Channel Mini Class D Integrated Home Audio Outdoor Stereo Receiver with Bass Treble Control for Passive Speakers
- Banana Plugs with Dual Set Screws,Black and Red Aluminum Shell,6 Pairs
- Amazon Basics Speaker Cable, Easy Assembly, 16-Gauge, Bronze, 100 ft

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-02-22*