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  • VIDEO
  • 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
  • 2 Channel Stereo Amplifier for Passive SpeakersFosiAudioDirect

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

4.4 out of 5 stars (66)
Âé¶¹Çø's Choice highlights highly rated, well-priced products available to ship immediately.
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About this item

  • 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

Frequently bought together

This item: 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
$99.99
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Product information

Technical Details

Manufacturer ‎Shenzhen Foresight Technology Co., Ltd.
Place of Business ‎3rd Floor, Building 10, Aohua Industrial Zone, Gaofeng Community, Dalang Street, Longhua District, Shenzhen 518000 China
Part number ‎BT20A
Item Weight ‎680 g
Product Dimensions ‎13.21 x 8.99 x 3.61 cm; 680.39 g
Item model number ‎BT20A
Material ‎Plastic
Mounting Type ‎Surface Mount
Included components ‎User Manual
Batteries Required? ‎No
Length ‎5.2 inches
Width ‎3.54 inches
Height ‎1.42 inches

Additional Information

ASIN B0DP95N7T1
Customer Reviews
4.4 out of 5 stars (66)

4.4 out of 5 stars
Âé¶¹Çø Rank
Date First Available Nov. 29 2024

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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


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Product details

  • Product Dimensions ‏ : ‎ 13.21 x 8.99 x 3.61 cm; 680.39 g
  • Date First Available ‏ : ‎ Nov. 29 2024
  • Manufacturer ‏ : ‎ Shenzhen Foresight Technology Co., Ltd.
  • Place of Business ‏ : ‎ 3rd Floor, Building 10, Aohua Industrial Zone, Gaofeng Community, Dalang Street, Longhua District, Shenzhen 518000 China
  • ASIN ‏ : ‎ B0DP95N7T1
  • Item model number ‏ : ‎ BT20A
  • Country of origin ‏ : ‎ China
  • Âé¶¹Çø Rank: #3,100 in Electronics (See Top 100 in Electronics)
  • Customer Reviews:
    4.4 out of 5 stars (66)

Product Description

The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked.

Fosi Audio bt20a amplifier home audio

Merchant video
audio component amplifiers

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 ¡Ü 0.04%, SNR ¡Ý 98dB
  • Power Adapter: 24V/4.5A, DC Input Range: 12-24V

More details about the BT20A amplifier for potential assistance:

  • If you're seeking the upgraded version of the BT20A, please consider the BT20A Pro amplifier.
  • The BT20A amplifier is designed for a 2.0-channel audio system and is not intended for a 4-channel system.
  • Generally, it is not recommended to use a turntable with the BT20A amplifier unless your turntable is with a built-in phono preamp.
  • In terms of accessories, a set of 24V/4.5A power cables and an instruction manual will be provided. Note: Remote control and extra cables are not included.

Comparison

BT20A

BT10A

BT20A PRO

BT30D

BT30D PRO

Customer Reviews
4.4 out of 5 stars 66
4.4 out of 5 stars 12
4.5 out of 5 stars 88
4.3 out of 5 stars 45
4.7 out of 5 stars 51
Type
Bluetooth 2.0 CH Amp Bluetooth 2.0 CH Amp Bluetooth 2.0 CH Amp Bluetooth 2.1 CH Amp Bluetooth 2.1 CH Amp
MAX Power Output
100W x 2 50W x 2 300W x 2 50W x 2+100W 165°Â¡Á2+350°Â
Input
Bluetooth + RCA Bluetooth + 3.5mm AUX Bluetooth + RCA Bluetooth + RCA Bluetooth + RCA
Output
Passive Speakers Passive Speakers Passive Speakers+Pre-Out Passive SPK+Active/Passive Sub Passive/Active Speakers/Sub
Treble & Bass Control
THD
¡Ü 0.04% ¡Ü 0.04% ¡Ü 0.005% ¡Ü 0.04% ¡Ü 0.3%
SNR
¡Ý 98dB ¡Ý 98dB ¡Ý108»åµþ ¡Ý 98dB ¡Ý 108dB
Terminating Impedance
2-8 Ohm 2-8 Ohm 2-8 Ohm 2-8 Ohm 2-8 Ohm
Power Adapter
24V/4.5A 19V/4.74A 32V/5A 24V/4.5A 32V/5A
Work Voltage
AC 110V - 240V AC 110V - 240V AC 110V - 240V AC 110V - 240V AC 110V - 240V

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Customer reviews

4.4 out of 5 stars
66 global ratings

Customers say

Customers find this electronic component amplifier performs better than expected and does what it needs to do. They describe it as good quality and a nice unit. The sound quality receives positive feedback. Users appreciate the bluetooth option and find it an effective bluetooth solution. Many are amazed by the power and note the excellent performance to size ratio. However, customers have mixed opinions about the size.
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12 customers mention performance, 11 positive, 1 negative
The electronic component amplifier delivers reliable performance that exceeds customer expectations. It works effectively with outdoor Yamaha speakers and powers 120v bookshelf speakers without any issues. Users find it very reliable for their audio needs.
Love it... Have it in my Cabana... Works greatRead more
So far so good. Poweers my 120v bookshelf speakers no problem. And I like how small and sleek looking it isRead more
Very little amplifier but sounds great.working great with outdoor Yamaha speakersRead more
Good base overall pretty good performanceRead more
11 customers mention quality, 8 positive, 3 negative
Customers find this electronic component amplifier to be a nice unit with good quality. They describe it as a quality functional product and a great mini amp that is impressive despite its small size.
Great mini amp.Read more
This little amp is impressive. Didn't expect it to perform like it has. Don't let the size fool you, it's a tiny powerhouse....Read more
Terrible quality. I bought two of these devices - the first broke within a week and the second made it three weeks....Read more
...them plugged in to an AM/FM/RCA-in amplifier...A little old but of decent quality....Read more
10 customers mention sound quality, 10 positive, 0 negative
Customers appreciate the sound quality of this electronic component amplifier.
...WOW I was very surprised at the sound quality. Even when cranking up the volume there was no distortion and amplifier remained cool to the touch....Read more
...or this one is awesome but I can confirm that I've never had such excellent sound come out of those speakers....Read more
Very little amplifier but sounds great.working great with outdoor Yamaha speakersRead more
This thing has a kick. Amazed by the power and quality of the sound....Read more
7 customers mention bluetooth connectivity, 5 positive, 2 negative
Customers find the electronic component amplifier offers good bluetooth connectivity. They describe it as an effective bluetooth solution with easy bluetooth pairing, and some consider it the best little bluetooth system available.
...phone we were using so I ordered this little unit because of the bluetooth option....Read more
This is the best little Bluetooth system I have ever experienced, You can't go wrong if you purchase this unit.Read more
...I found are that you can not select the input to use, Bluetooth always has priority and since there is no pairing code for the Bluetooth anyone can...Read more
...Powerful and with Bluetooth along with rca inputs this little Fosi is very versatile....Read more
7 customers mention power, 6 positive, 1 negative
Customers are amazed by the power of this electronic component amplifier and find it delivers excellent performance to size ratio.
Reasonably powerful, good sounding (very good in fact, better than expected), intuitive and easy bluetooth pairing...Read more
Can¡¯t say enough good things about this little amp. Powerful and with Bluetooth along with rca inputs this little Fosi is very versatile....Read more
Excellent performance to size ratio. Very good midrange response.Read more
...The quality of sound is unmatched. The power is great. Could have more punch but it can fill a room without an issue. Will deff buy more.Read more
6 customers mention size, 4 positive, 2 negative
Customers have mixed opinions about the amplifier's size. Some find it small and describe it as a very little amplifier, while others note that the power adapter is larger than expected.
...Poweers my 120v bookshelf speakers no problem. And I like how small and sleek looking it isRead more
Very little amplifier but sounds great.working great with outdoor Yamaha speakersRead more
Small but mighty...Read more
...Don't let the size fool you, it's a tiny powerhouse. I decided on this one model as a test for the brand overall....Read more
Fosi BT20A
5 out of 5 stars
Fosi BT20A
This little amp is impressive. Didn't expect it to perform like it has. Don't let the size fool you, it's a tiny powerhouse. I decided on this one model as a test for the brand overall. I will be purchasing more Fosi audio in the future for sure.
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Top reviews from Canada

  • Reviewed in Canada on March 9, 2026
    Verified Purchase
    Reasonably powerful, good sounding (very good in fact, better than expected), intuitive and easy bluetooth pairing (which automatically over-rides RCA inputs when paired).

    I like this little amp, especially for the price. No frills, does what it needs to do, and gets out of the way.
  • Reviewed in Canada on January 22, 2026
    Verified Purchase
    Ordered one and when it came it wast working as it should, a seamless return process and reordered. The new one is 10/10 works as it should. Very happy!
  • Reviewed in Canada on June 12, 2025
    Verified Purchase
    I have speakers in the ceiling (3 pairs) over the kitchen, dining area, and formal dining room. I had wired it up when our house was being built. All the wiring ends up coming out of a wall-socket in the family room and I had them plugged in to an AM/FM/RCA-in amplifier...A little old but of decent quality.

    We got tired of constantly searching for the appropriate adaptor cables depending on who's phone we were using so I ordered this little unit because of the bluetooth option.

    I fired it up yesterday and wasn't expecting much because of the size and price. I SEAMLESSLY connected an iPhone and either my previous unit was terrible or this one is awesome but I can confirm that I've never had such excellent sound come out of those speakers.

    I can't speak for longevity but at this price, I almost don¡¯t care. ? ? ?
    2 people found this helpful
    Report
  • Reviewed in Canada on December 2, 2025
    Verified Purchase
    I am pretty much an audiophile so was not expecting much. I am using this to connect to firestick via Bluetooth and two old Bose speakers in our bedroom. WOW I was very surprised at the sound quality. Even when cranking up the volume there was no distortion and amplifier remained cool to the touch. A few things to note than after powering off and powering up will not automatically connect to firestick which is a minor pain. The power adapter is larger than the unit itself which might be an issue if space is tight. But overall this purchase shows that you can get quality audio (assuming lasts for a few years) for little $$.
    2 people found this helpful
    Report
  • Reviewed in Canada on December 7, 2025
    Verified Purchase
    Good base overall pretty good performance
  • Reviewed in Canada on December 1, 2025
    Verified Purchase
    Bought this for work and just used some speakers from my Sony sound system. The quality of sound is unmatched. The power is great. Could have more punch but it can fill a room without an issue. Will deff buy more.
    One person found this helpful
    Report
  • Reviewed in Canada on January 16, 2026
    Verified Purchase
    not worth the money dead after a few months the return time frame ran out.....the little cheap ones are better...
  • Reviewed in Canada on February 7, 2026
    Verified Purchase
    This little amp is impressive. Didn't expect it to perform like it has. Don't let the size fool you, it's a tiny powerhouse. I decided on this one model as a test for the brand overall. I will be purchasing more Fosi audio in the future for sure.
    Customer image
    5.0 out of 5 stars
    Fosi BT20A

    Reviewed in Canada on February 7, 2026
    This little amp is impressive. Didn't expect it to perform like it has. Don't let the size fool you, it's a tiny powerhouse. I decided on this one model as a test for the brand overall. I will be purchasing more Fosi audio in the future for sure.
    Images in this review
    Customer image

Product Summary: 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

From Fosi Audio

4.4 out of 5 stars, 66 ratings

Customer reviews

50+ bought in past month

Price

No featured offers available

Other sellers

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About this Item

  • 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

Product description

Fosi Audio BT20A is a Hi-Fi wireless stereo 2-channel amplifier that features 100W x 2 output, and Bluetooth 5.0 streaming range up to 50ft (15m), it is a mini power amp which is equipped with bass and treble control. Simple compact design but practical and powerful. *Audio Input: Bluetooth / RCA *SNR: ¡Ý 98dB *THD: ¡Ü 0.5% *Frequency Range: 20Hz - 20kHz (¡À1 dB)

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