---
product_id: 393820985
title: "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"
brand: "fosi audio"
price: "¥31363"
currency: JPY
in_stock: true
reviews_count: 13
category: "Fosi Audio"
url: https://www.desertcart.jp/products/393820985-bt20a-pro-bluetooth-5-0-amplifier-300w-x2-wireless-amp
store_origin: JP
region: Japan
---

# Bluetooth 5.0 wireless tech 600W total power output Custom bass & treble control 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

**Brand:** fosi audio
**Price:** ¥31363
**Availability:** ✅ In Stock

## Summary

> 🎧 Elevate your sound game—because your speakers deserve a pro-level boost!

## Quick Answers

- **What is this?** 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 by fosi audio
- **How much does it cost?** ¥31363 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/393820985-bt20a-pro-bluetooth-5-0-amplifier-300w-x2-wireless-amp)

## 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

- • **Tailor Your Soundscape:** Adjust bass and treble with precision to match your vibe, from crisp highs to deep, punchy lows.
- • **Built to Last & Impress:** Compact metal chassis blends premium durability with sleek design—fits perfectly in any modern workspace or living room.
- • **Audiophile-Grade Clarity:** TPA3255 chip with ultra-low distortion (THD ≤ 0.005%) and high SNR (≥108dB) for pristine audio fidelity.
- • **Power that Packs a Punch:** Dual 300W channels deliver room-filling, crystal-clear sound for your home or outdoor setup.
- • **Seamless Wireless Connectivity:** Bluetooth 5.0 ensures fast, stable pairing with memory function—ditch the wires, not the quality.

## Overview

The Fosi Audio BT20A Pro is a compact, high-performance Class D amplifier delivering 300W per channel with Bluetooth 5.0 wireless connectivity. Featuring a premium TPA3255 chip, it offers ultra-low distortion and high signal-to-noise ratio for crystal-clear audio. Customizable bass and treble controls let you fine-tune your listening experience, while its durable metal build and compact size make it ideal for both home and outdoor stereo setups. Perfect for millennials seeking professional-grade sound without the premium price tag.

## Description

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 : desertcart.in: Electronics

Review: Fosi BT20A Pro: A Compact Powerhouse for Audiophiles - I have been thinking about setting up a music system that delivers amazing quality for a small space, especially for long listening sessions. Using in-ear pods for extended periods can be uncomfortable and potentially harmful to the ears, so I decided to repurpose some of my existing speakers that hadn’t been used in a while. My setup includes a MacBook Pro, connected via the 3.5mm jack to the Fosi BT20A Pro amplifier, driving Polk RTi FXi A6 surround speakers. I’ve chosen this configuration because the FXi A6 offers a frequency response that suits my needs perfectly. I primarily use Apple Music, streaming at 98 kHz, and the results have been impressive. To further enhance the audio quality and fully utilize Apple Music Hi-Res, I bought the Fosi DS1 DAC. After adding the DS1, the total listening experience became phenomenal. Thank you, Fosi, for such innovative products at such great prices. Need not spend lakhs of money to hear the same music. Design and Build Quality One of the first things you’ll notice about the Fosi BT20A Pro is its solid construction. The metal housing gives it a premium feel, and its compact size makes it easy to fit into any setup, whether on a desktop or as part of a larger home audio system. Sound Quality: The sound is clear and well-balanced, with a good sense of depth and detail. The amp does a great job of driving speakers to their full potential, delivering crisp highs, detailed mids, and punchy bass. With the addition of the Fosi DS1 DAC, the audio experience reaches new heights, fully capturing the richness of Apple Music’s Hi-Res offerings. Low Noise Floor: Even at higher volumes, the amp remains quiet, with no noticeable hum or hiss. This makes it a great choice for critical listening in quieter environments. Value for Money Given its price point, the Fosi BT20A Pro offers excellent value. It’s a budget-friendly option that doesn’t skimp on quality, making it an ideal choice for those looking to upgrade their audio system without breaking the bank. • Affordable: Considering the performance and build quality, the BT20A Pro is priced very competitively. It offers features and sound quality that you’d typically find in more expensive models. • Long-Term Investment: Thanks to its robust build and reliable performance, the BT20A Pro feels like a piece of equipment that will last, making it a sound investment for any audio enthusiast. Conclusion The Fosi BT20A Pro is a fantastic little amplifier that punches well above its weight. It offers great sound quality, versatile features, and solid build quality, all at an affordable price. Whether you’re a casual listener or an audiophile on a budget, this amp is sure to impress. With the addition of the Fosi DS1 DAC, the listening experience becomes exceptional, fully taking advantage of Hi-Res audio formats.
Review: Professional grade amp - This is a professional grade amplifier with 300 watts rms on each channel. Can plug multiple devices through Bluetooth and RCA in. Every time you switch an input device you have to clear the Bluetooth, this itself is a security feature. Output quality is amazing, it’s crystal clear with bass boost doing wonders. I coupled 25 year old Sony Home Theater speakers with this amplifier and output is exceeding my expectation. Does paired with Mac, iPhone and Sony boombox. Worked like a smooth sail. Buy good quality cables to give better performance. Wish you the best.

## Features

- 300 Watts x 2 Power Output: The TI TPA3255 chip amplifier has a feedback design and high-speed gate driver error connection for efficient and quality audio performance, with a low idle loss of <2.5W
- High-Efficiency: The chip amplifier has replaceable Op-Amps for a custom approach when compared to the BT20A amplifier. Further, you can swap the 2 plug-in NE5532 Op-Amps for LME49720HA, MUSES02, OPA2604AP, OPA2134PA, LM4562, or NJM4556AD Op-Amps to achieve distinct sound qualities. It boasts an SNR≥108dB and THD≤0.005%
- Bluetooth 5.0 Connectivity: The Bluetooth pair can be removed by pressing and holding the volume control for 5 seconds, and it also has a memory function for easy pairing and an alert tone for convenience
- Custom Sound with Bass and Treble Controls: The BT20A Pro home audio amplifier has a sound control design so that you can experience sound without effects by setting treble and bass effects to the middle point
- Package Contents: The package contains a BT20A Pro power amplifier, a Bluetooth antenna, a 32V/5A power adapter, an AC cord, and a user manual

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07JVFY27T |
| Audio Wattage | 150 Watts |
| Batteries Included | No |
| Batteries Required | No |
| Best Sellers Rank | #12,723 in Electronics ( See Top 100 in Electronics ) #6 in Hi-Fi Amplifiers |
| Brand | Fosi Audio |
| Colour Screen | No |
| Country of Origin | China |
| Customer Reviews | 4.4 4.4 out of 5 stars (2,377) |
| Date First Available | 23 October 2018 |
| Generic Name | Amplifier |
| Importer | support@fosiaudio.com |
| Includes Rechargeable Battery | No |
| Item Dimensions LxWxH | 14.2 x 10.7 x 0.4 Centimeters |
| Item Weight | 1 kg 100 g |
| Item dimensions L x W x H | 14.2 x 10.7 x 0.4 Centimeters |
| Item model number | BT20A PRO |
| Manufacturer | Fosi Audio |
| Maximum Supply Voltage | 32 Volts |
| Minimum Supply Voltage | 24 Volts |
| Model | BT20A PRO |
| Mounting Hardware | Electronic Component Amplifier |
| Mounting Type | Surface Mount |
| Number of Channels | 2 |
| Number of items | 1 |
| Output Power | 600 Watts |
| Packer | support@fosiaudio.com |
| Power Source | corded electric |
| Product Dimensions | 14.2 x 10.7 x 0.41 cm; 1.1 kg |
| Specification Met | CE, FCC, RoHS |
| Voltage | 32 Volts |
| Wattage | 600 Watts |
| Wireless Type | Bluetooth |

## Product Details

- **Item dimensions L x W x H:** 14.2 x 10.7 x 0.4 Centimeters
- **Manufacturer:** Fosi Audio
- **Maximum Supply Voltage:** 32 Volts
- **Minimum Supply Voltage:** 24 Volts
- **Voltage:** 32 Volts

## Images

![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 - Image 1](https://m.media-amazon.com/images/I/61ne1lo34ML.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Fosi BT20A Pro: A Compact Powerhouse for Audiophiles
*by R***H on 31 August 2024*

I have been thinking about setting up a music system that delivers amazing quality for a small space, especially for long listening sessions. Using in-ear pods for extended periods can be uncomfortable and potentially harmful to the ears, so I decided to repurpose some of my existing speakers that hadn’t been used in a while. My setup includes a MacBook Pro, connected via the 3.5mm jack to the Fosi BT20A Pro amplifier, driving Polk RTi FXi A6 surround speakers. I’ve chosen this configuration because the FXi A6 offers a frequency response that suits my needs perfectly. I primarily use Apple Music, streaming at 98 kHz, and the results have been impressive. To further enhance the audio quality and fully utilize Apple Music Hi-Res, I bought the Fosi DS1 DAC. After adding the DS1, the total listening experience became phenomenal. Thank you, Fosi, for such innovative products at such great prices. Need not spend lakhs of money to hear the same music. Design and Build Quality One of the first things you’ll notice about the Fosi BT20A Pro is its solid construction. The metal housing gives it a premium feel, and its compact size makes it easy to fit into any setup, whether on a desktop or as part of a larger home audio system. Sound Quality: The sound is clear and well-balanced, with a good sense of depth and detail. The amp does a great job of driving speakers to their full potential, delivering crisp highs, detailed mids, and punchy bass. With the addition of the Fosi DS1 DAC, the audio experience reaches new heights, fully capturing the richness of Apple Music’s Hi-Res offerings. Low Noise Floor: Even at higher volumes, the amp remains quiet, with no noticeable hum or hiss. This makes it a great choice for critical listening in quieter environments. Value for Money Given its price point, the Fosi BT20A Pro offers excellent value. It’s a budget-friendly option that doesn’t skimp on quality, making it an ideal choice for those looking to upgrade their audio system without breaking the bank. • Affordable: Considering the performance and build quality, the BT20A Pro is priced very competitively. It offers features and sound quality that you’d typically find in more expensive models. • Long-Term Investment: Thanks to its robust build and reliable performance, the BT20A Pro feels like a piece of equipment that will last, making it a sound investment for any audio enthusiast. Conclusion The Fosi BT20A Pro is a fantastic little amplifier that punches well above its weight. It offers great sound quality, versatile features, and solid build quality, all at an affordable price. Whether you’re a casual listener or an audiophile on a budget, this amp is sure to impress. With the addition of the Fosi DS1 DAC, the listening experience becomes exceptional, fully taking advantage of Hi-Res audio formats.

### ⭐⭐⭐⭐⭐ Professional grade amp
*by P***R on 11 September 2025*

This is a professional grade amplifier with 300 watts rms on each channel. Can plug multiple devices through Bluetooth and RCA in. Every time you switch an input device you have to clear the Bluetooth, this itself is a security feature. Output quality is amazing, it’s crystal clear with bass boost doing wonders. I coupled 25 year old Sony Home Theater speakers with this amplifier and output is exceeding my expectation. Does paired with Mac, iPhone and Sony boombox. Worked like a smooth sail. Buy good quality cables to give better performance. Wish you the best.

### ⭐⭐⭐⭐ Good amplifier
*by A***R on 29 November 2025*

Pros: 1. No hissing or power on pop sound. 2. Mild heating, even after running for 5 hours 3. Well built and feels solid 4. Bluetooth connects properly and sound quality is good. 5. Bass cntrol and treble is also good. Treble works better than bass. 6. Size is small and does not occupy space. Can be kept on top of speaker. Cons 1. Amplification seems to be little less. Since the volumen control is lograthimic, you have to keep the knob greater than 60% to get a decent volume. Overall, value for money. I mostly listen to classical and old Hindi songs and the sound quality is good.

## 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 Japan*
*Store origin: JP*
*Last updated: 2026-01-28*