---
product_id: 62378448
title: "Fosi Audio BT20A Bluetooth Stereo Amplifier, 2 Channel Home Audio Component Amplifiers for Passive Speakers, Mini Class D Amp Receiver 200W for Indoor/Outdoor/Garage/Ceiling/Bookshelf Speaker"
brand: "fosi audio"
price: "$191.50"
currency: USD
in_stock: true
reviews_count: 13
category: "Fosi Audio"
url: https://www.desertcart.us/products/62378448-fosi-audio-bt20a-bluetooth-stereo-amplifier-2-channel-home-audio
store_origin: US
region: United States of America
---

# Seamless Bluetooth 5.0 streaming 200W max output power Compact all-black metal design Fosi Audio BT20A Bluetooth Stereo Amplifier, 2 Channel Home Audio Component Amplifiers for Passive Speakers, Mini Class D Amp Receiver 200W for Indoor/Outdoor/Garage/Ceiling/Bookshelf Speaker

**Brand:** fosi audio
**Price:** $191.50
**Availability:** ✅ In Stock

## Summary

> 🎶 Elevate your space with power and style — don’t just listen, own the vibe!

## Quick Answers

- **What is this?** Fosi Audio BT20A Bluetooth Stereo Amplifier, 2 Channel Home Audio Component Amplifiers for Passive Speakers, Mini Class D Amp Receiver 200W for Indoor/Outdoor/Garage/Ceiling/Bookshelf Speaker by fosi audio
- **How much does it cost?** $191.50 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/62378448-fosi-audio-bt20a-bluetooth-stereo-amplifier-2-channel-home-audio)

## 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

- • **Sleek & Durable:** Minimalist all-black metal chassis blends seamlessly with modern decor while standing up to daily use.
- • **Versatile Placement:** Compact footprint fits perfectly in offices, patios, garages, or bookshelf setups—wherever sound matters.
- • **Plug & Play Simplicity:** One-touch power and intuitive bass/treble controls make setup and tuning a breeze for busy pros.
- • **Powerhouse Performance:** Delivers a robust 100Wx2 channels to energize any passive speaker setup, indoor or outdoor.
- • **Effortless Connectivity:** Rock-solid Bluetooth pairing ensures zero dropouts and instant streaming from all your devices.

## Overview

The Fosi Audio BT20A is a mini Class D Bluetooth stereo amplifier delivering 200W total power (100Wx2 channels) for passive speakers. Its compact, all-black metal design fits any environment, from home offices to outdoor patios. Featuring seamless Bluetooth connectivity and RCA inputs, it offers easy setup with one-touch power and tone controls. Perfect for millennials seeking powerful, stylish, and versatile audio solutions that integrate effortlessly into modern living and workspaces.

## Description

Product description Bluetooth Amplifier home audio Simple yet Powerful Mini Amp Guided by our mission of "Redefining HiFi with Unmatched Value", Fosi Audio continues to fuel its passion for the Hifi industry, ramp up R&D efforts, and co-create new HiFi equipment with users. We pledge to bring more amazing Hifi gear with high value for the price, innovative design, cutting-edge technology, and premium quality, to audiophiles worldwide. MAX Power Output: 100W x 2 Terminating Impedance: 2 Ohm - 8 Ohm THD ≤ 0.04%, SNR ≥ 98dB Power Adapter: 24V/4.5A, DC Input Range: 12-24V A No-Frills Amp 100 watt per channel power output can drive most home passive speakers to create astonishing sound. With a Nice Consistent Resistance Fine-tune your sound with the smooth bass and treble adjustment for optimal speaker performance. Bluetooth Amplifier for Speakers Instant setup with phones, tablets, and almost any other Bluetooth-enabled devices. Crystal-Clear Hi-Fi Audio Exceptional clarity at high volumes, with <0.04% distortion. Power the Pair of Indoor/ Outdoor Speakers Paired with your audio device over Bluetooth or RCA cable, you will get a rich and clear sound. Advanced Circuitry Architecture The Texas Instruments TPA3116D2 Chip presents music with rousing highs and deep lows. Safe DC Outlet Input: Bluetooth and RCA; Output: Passive Speakers Friendly Solutions Guide Q: How do I switch between RCA and Bluetooth on the BT20A? A: Bluetooth takes priority over RCA. To switch to RCA, restart the device or disconnect Bluetooth. Q: What is the position for flat frequency response on the amplifier? A: The middle position (12 o'clock) provides a flat frequency response. Q: What type of DC plug do I need for the BT20A's power supply? A: The DC barrel connector dimensions are 5.5*2.5mm. Q: What's the upgraded version of the BT20A amp, and what accessories come with it? A: -If you're seeking the upgraded version of the BT20A, please consider the BT20A Pro amp. -In terms of accessories, a set of 24V/4.5A power cables and an instruction manual will be provided. Note: Remote control, banana plugs and extra cables are not included. Q: Can you control the BT20A's volume from a tablet or phone via bluetooth connection as I do not want to walk to the device to alter the volume. A: You can control the volume directly from the audio source via the Bluetooth connection. Q:Sound quality is not good? A: - Ensure that all cables are properly connected. -Adjust the treble and bass controls on the power amplifier to achieve the desired sound. -Try changing the sound source, speakers and cables to test. Please use high-quality music input. Find More Bluetooth Amplifier from Fosi Audio BT20A BT20A PRO BT10A BT30D BT30D PRO MC101 MC331

Review: Tiny amp, big upgrade (TV finally sounds like a TV should - Honestly one of my favorite purchases this year. This thing is small—like “where did it go?” small—but it has zero issue driving a pair of bookshelf speakers. I’ve got it hooked up to the bedroom TV through the aux output, so no remote juggling or Bluetooth reconnect nonsense—it just turns on with the TV and works. That alone made it feel way more “built-in” than I expected. Sound quality is a huge step up. Dialogue is clear, everything has more depth, and it actually feels like a real audio setup instead of thin TV speakers. Simple, clean, and way more powerful than it looks. Easy win if you’ve got speakers sitting around.
Review: This is an excellent product - TL;DR: This works exactly as it should. Great piece of equipment is such a tiny form factor I've been meaning to setup a more permanent outdoor speaker solution to my backyard and was going to go with the old fashioned "run 200 feet of speaker cable" because the high receiver I bought was pretty far away and I was going to use Zone 2 for the speakers. But this little package came up on my searches and it was exactly what I wanted and more. There is an area in the backyard that we set up outdoor movies at and I use a portable speaker for sound. Instead it dawned on me that not only can i stream music from any source with this bluetooth connection to this device, I can also double up and use it for outdoor movies if I place them correctly. Well I found an outdoor telephone jack and indoor jack and I was able to run audio cable outside through those openings which were right next to where I would put the movie screen. So I was able to put two outdoor speakers in a place so that it can provide sound for movies AND they are in a general area that I can stream/play music for the backyard in general. No need to wire anything from the receiver and eliminates the need to bring out a boombox outdoor speaker for movies. What I was really happy about is how fast and solid the bluetooth connection is. I use an old laptop for streaming music and store all my ripped CDs. I thought I was going to have to hardwire the laptop to this Fosi amp because the laptop is like six years old. After a little work and trial and error, I finally figured it out and it works. The first time the laptop had a hard time finding it but now that it is in the list of known devices, it connects flawlessly. I tried iphones, tables, etc. and all of the newer devices find it with no problems. Even my echo show found it and its about 40 feet away in another room. Movies sound great, have my Lounge music running at night and I'm so happy about this setup. And, going back to my resistance to running cable, I only need 30 feet of outdoor cable for both speakers so it was convenience too. Highly recommend this product: very inexpensive, does exactly what it is supposed to and greatly enhances the flexibility of what you can do.

## Features

- ENTRY-LEVEL POWER AMPLIFIER: Experience powerful sound with the BT20A Bluetooth amplifier, boasting an impressive 100Wx2 maximum output power. It can power multiple speaker cabinets, which can be used at home or in small venues
- EFFECTIVE, SIMPLE, AND NO FRILLS: The compact design allows it to be used in any space where passive speakers are required. It can be used in an office, a bedroom, a living room, a garage, or even on the patio
- EASY TO SET UP: The 2 Channel amplifier has a straightforward installation and a one-touch power switch for easy operation. The smooth bass and treble controls allow tuning to taste and the connected bookshelf speakers
- BLUETOOTH AND RCA INPUTS: The seamless Bluetooth connectivity allowing you to stream music directly from your phone without any dropouts or delays, delivering crystal-clear sound and impressive volume for your home audio setup
- ALL-BLACK DESIGN: This Class D amplifier features an integrated one-piece design that not only adds to its looks but also makes it more durable. With its stylish look, it fits wonderful on any shelf and complements most home decor

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07BQC7GNL |
| Best Sellers Rank | #2,342 in Electronics ( See Top 100 in Electronics ) #6 in Audio Component Amplifiers |
| Brand | Fosi Audio |
| Built-In Media | Fosi Audio BT20A Amplifier x1, 24V 4.5A Power Supply x1, User Manual x1 |
| Customer Reviews | 4.5 out of 5 stars 9,554 Reviews |
| Item Type Name | Bluetooth Amplifier |
| Item Weight | 1.5 Pounds |
| Manufacturer | Fosi Audio |
| Mfr Part Number | BT20A |
| Model Number | BT20A |
| Unit Count | 1.0 Count |
| Warranty Description | 24-month manufacturer |

## Product Details

- **Item dimensions L x W x H:** 5.2 x 3.54 x 1.42 inches
- **Manufacturer:** Fosi Audio
- **Maximum Supply Voltage:** 24 Volts
- **Minimum Supply Voltage:** 12 Volts (DC)
- **Voltage:** 230 Volts

## Images

![Fosi Audio BT20A Bluetooth Stereo Amplifier, 2 Channel Home Audio Component Amplifiers for Passive Speakers, Mini Class D Amp Receiver 200W for Indoor/Outdoor/Garage/Ceiling/Bookshelf Speaker - Image 1](https://m.media-amazon.com/images/I/61+cd+AMZcL.jpg)
![Fosi Audio BT20A Bluetooth Stereo Amplifier, 2 Channel Home Audio Component Amplifiers for Passive Speakers, Mini Class D Amp Receiver 200W for Indoor/Outdoor/Garage/Ceiling/Bookshelf Speaker - Image 2](https://m.media-amazon.com/images/I/71cZWwolyYL.jpg)
![Fosi Audio BT20A Bluetooth Stereo Amplifier, 2 Channel Home Audio Component Amplifiers for Passive Speakers, Mini Class D Amp Receiver 200W for Indoor/Outdoor/Garage/Ceiling/Bookshelf Speaker - Image 3](https://m.media-amazon.com/images/I/71OPBXwFnKL.jpg)
![Fosi Audio BT20A Bluetooth Stereo Amplifier, 2 Channel Home Audio Component Amplifiers for Passive Speakers, Mini Class D Amp Receiver 200W for Indoor/Outdoor/Garage/Ceiling/Bookshelf Speaker - Image 4](https://m.media-amazon.com/images/I/71ZEBQfaP+L.jpg)
![Fosi Audio BT20A Bluetooth Stereo Amplifier, 2 Channel Home Audio Component Amplifiers for Passive Speakers, Mini Class D Amp Receiver 200W for Indoor/Outdoor/Garage/Ceiling/Bookshelf Speaker - Image 5](https://m.media-amazon.com/images/I/71qYzSzMSJL.jpg)

## Questions & Answers

**Q: How do I switch between RCA and Bluetooth on the BT20A?**
A: Bluetooth takes priority over RCA. To switch to RCA, restart the device or disconnect Bluetooth.

**Q: What is the position for flat frequency response on the amplifier?**
A: The middle position (12 o’clock) provides a flat frequency response.

**Q: What type of DC plug do I need for the BT20A’s power supply?**
A: The DC barrel connector dimensions are 5.5*2.5mm.

**Q: What's the upgraded version of the BT20A amp, and what accessories come with it?**
A: -If you're seeking the upgraded version of the BT20A, please consider the BT20A Pro amp.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Tiny amp, big upgrade (TV finally sounds like a TV should
*by R***L on April 21, 2026*

Honestly one of my favorite purchases this year. This thing is small—like “where did it go?” small—but it has zero issue driving a pair of bookshelf speakers. I’ve got it hooked up to the bedroom TV through the aux output, so no remote juggling or Bluetooth reconnect nonsense—it just turns on with the TV and works. That alone made it feel way more “built-in” than I expected. Sound quality is a huge step up. Dialogue is clear, everything has more depth, and it actually feels like a real audio setup instead of thin TV speakers. Simple, clean, and way more powerful than it looks. Easy win if you’ve got speakers sitting around.

### ⭐⭐⭐⭐⭐ This is an excellent product
*by R***E on August 7, 2022*

TL;DR: This works exactly as it should. Great piece of equipment is such a tiny form factor I've been meaning to setup a more permanent outdoor speaker solution to my backyard and was going to go with the old fashioned "run 200 feet of speaker cable" because the high receiver I bought was pretty far away and I was going to use Zone 2 for the speakers. But this little package came up on my searches and it was exactly what I wanted and more. There is an area in the backyard that we set up outdoor movies at and I use a portable speaker for sound. Instead it dawned on me that not only can i stream music from any source with this bluetooth connection to this device, I can also double up and use it for outdoor movies if I place them correctly. Well I found an outdoor telephone jack and indoor jack and I was able to run audio cable outside through those openings which were right next to where I would put the movie screen. So I was able to put two outdoor speakers in a place so that it can provide sound for movies AND they are in a general area that I can stream/play music for the backyard in general. No need to wire anything from the receiver and eliminates the need to bring out a boombox outdoor speaker for movies. What I was really happy about is how fast and solid the bluetooth connection is. I use an old laptop for streaming music and store all my ripped CDs. I thought I was going to have to hardwire the laptop to this Fosi amp because the laptop is like six years old. After a little work and trial and error, I finally figured it out and it works. The first time the laptop had a hard time finding it but now that it is in the list of known devices, it connects flawlessly. I tried iphones, tables, etc. and all of the newer devices find it with no problems. Even my echo show found it and its about 40 feet away in another room. Movies sound great, have my Lounge music running at night and I'm so happy about this setup. And, going back to my resistance to running cable, I only need 30 feet of outdoor cable for both speakers so it was convenience too. Highly recommend this product: very inexpensive, does exactly what it is supposed to and greatly enhances the flexibility of what you can do.

### ⭐⭐⭐⭐⭐ Small, but Powerful. Great Support
*by W***S on May 20, 2023*

When it comes to amplifiers, the Fosi Audio BT20A Bluetooth Speaker Amp is an undisputed game-changer. Encased in a modestly compact form, this small but mighty beast asserts the timeless adage that size isn't everything. It defies its dimensions, delivering an impressive level of power that can rival or even surpass larger counterparts. The first thing you'll notice about the BT20A is its design. Don't be fooled by its diminutive size; this amplifier does not compromise on quality or performance. The unit packs a serious punch for a device of its stature. It's engineered with high power output to deliver crystal clear, rich, and detailed sound to your speakers. The BT20A boasts an impressive feature set, including its Bluetooth functionality. The Bluetooth connection is smooth and reliable, extending a generous range that grants you the freedom to roam while maintaining control over your audio. Whether you're looking to pump up the volume for a backyard barbecue or craving some soothing tunes in the tranquility of your study room, the BT20A delivers outstanding performance with style and ease. But what truly sets the Fosi Audio BT20A apart is not just its superb performance and compact design; it's the company's exceptional commitment to customer satisfaction. I experienced a minor hiccup with the Bluetooth connectivity of the first unit, but Fosi Audio's customer service was absolutely stellar. They promptly sent out a replacement, ensuring that the minor setback was resolved efficiently and I could get back to enjoying my music without delay. Fosi Audio's willingness to stand by their product and swiftly address any issues is highly commendable. It's a testament to their dedication to providing a top-notch customer experience, further adding to the already spectacular appeal of the BT20A. In conclusion, the Fosi Audio BT20A is a true titan in a compact package. Its powerful output, seamless Bluetooth connectivity, and Fosi Audio's stellar customer service make it an unparalleled choice for anyone looking to enhance their audio experience. If you're seeking a small, powerful, and reliable Bluetooth amplifier, I wholeheartedly recommend the Fosi Audio BT20A. It may be small in size, but it's big on performance.

## Frequently Bought Together

- Fosi Audio BT20A Bluetooth Stereo Amplifier, 2 Channel Home Audio Component Amplifiers for Passive Speakers, Mini Class D Amp Receiver 200W for Indoor/Outdoor/Garage/Ceiling/Bookshelf Speaker
- 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 United States of America*
*Store origin: US*
*Last updated: 2026-05-19*