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🎧 Elevate your home audio game with Fosi’s compact power-packed amp!
The Fosi Audio BT20A is a compact 2-channel Class D amplifier delivering 100W RMS per channel with ultra-low distortion (0.04% THD). Featuring Bluetooth 5.0 for wireless streaming up to 50 feet, it supports passive speakers (2-8 ohms) and includes bass and treble controls for personalized sound. Powered by dual TI TPA3116D2 chips and a stable 24V/4.5A power supply, it offers reliable, high-fidelity audio in a sleek, space-saving design—perfect for millennials seeking premium sound without the bulk.














| ASIN | B07BQC7GNL |
| Best Sellers Rank | #106,473 in Electronics ( See Top 100 in Electronics ) #158 in Hi-Fi Amplifiers |
| Box Contents | 1 electronic component amplifier |
| Brand Name | Fosi Audio |
| Country of Origin | China |
| Customer Reviews | 4.5 out of 5 stars 9,237 Reviews |
| Item Weight Unit of Measure | 1.5 Pounds |
| Manufacturer | Fosi Audio |
| Manufacturer Part Number | BT20A |
| Model Number | BT20A |
| Unit Count | 1 Count |
| Warranty Description | no warranty available |
M**7
Works Good
I have been using this amplifier for a month now. It is working without any issues. The build quality of the amp as well as the adapter is very good. Looks tiny besides my old amp. My Old amp stopped working so am using this amplifier as an temporary alternative to power a set of Solidaire SS100 bookshelf speakers with a 12-inch woofer, a 4-inch midrange, and a 1-inch horn tweeter with impedance of 8 Ohms. Bluetooth range is also good. Comparable to my existing Logitech Bluetooth adapters. I have noticed it does not get warm on long usage when listening at acceptable volumes at home. The audio quality is flat and commendable in the Fosi amp, but I seem to miss the warmth my old Solidaire AS1200D amp provided. So, I tend to boost the lows and mids from the equalizer to get the desired effects. My decision on buying this over Aimyia amp was swayed because FOSI provide a warranty on their product, but Aimyia brand amps have no such mention in their listings.
@**!
Small on size big on sound.
Too tiny, infact the provided adapter brick is larger. Felt little warm after couple of hours of usage. Hopefully it will last for years to come. Have hooked my LG FB162 System speakers and the sound coming out is good. Even at low volume can get clarity. Bluetooth works like charm even when I take the source device in a different room still sound doesn't distort. Wish they have provided a remote or an app to control Bass and Treble.
T**J
Amazing audio
Its pretty good in sound quality and works well. I don't understand the part of loud noise from speaker for starting and switching off the device. Otherwise build quality, sound quality, packaging everything is very good.
G**A
Recommended
Nice music system
G**N
Number 1
Very good sound clarity and deep bass
A**R
Compact, easy to use
Works wonderfully for my old Sony AZ2D system. The original Sony touch panel was defunct and this Fosi module has brought my amazing speakers back to life. The Bluetooth is superb. No pairing, no “sleep mode” just leave it on and connect anytime without a fuss. Compact, solid metal construction, monochrome looks, and a vintage mechanical flip-switch for powering it in and off.
D**1
Nice
Does the job perfectly
R**L
Perfirmance
So far working well👍
N**F
Excellent Little Amp — Powers Outdoor Speakers with Ease
Works perfectly! I used this to fire up a pair of outdoor speakers that came with our house, and it’s been flawless. Super easy to connect via Bluetooth, and the sound quality is great — clear, strong, and consistent. I’ve left it on pretty much all the time, and it’s been running solid for about 8 months with no issues at all. For the price, this little amp delivers big performance. Highly recommend.
A**M
Mały ale byk ( wariat )
Mój amplituner Onkyo zajmował miejsce w moim minimalistycznie urządzonym salonie , dodatkowo nie posiada bluetooth , więc zakupiłem Fosi Audio , i.... Nie jestem melomanem i pewnie dla tego :-) nie słyszę różnicy między tymi wzmacniaczami , więc polecam wam też bo większość z was tak jak ja jej nie usłyszy
M**L
Good sound for the price
I’ve had it for a year and no problems, great sound
U**L
Mycket nöjd
Fungerar utmärkt med bra ljudkvite'
S**N
5 star
Excellent amp paired with polk audio speakers . 5 star hi fi sound for under 200 euro combined
Trustpilot
3 weeks ago
3 days ago