A compact wireless amplifier that delivers room-filling power and clear sound for home and outdoor speakers, Fosi Audio Bluetooth Amplifier BT20A pairs Class D amplification with Bluetooth 5.0 streaming. Effortless pairing and simple bass and treble controls make it easy to tailor music to a shelf or small listening space. Is the combination of high output and a small footprint the right fit for existing passive speakers?
⚡ At a Glance
- • Sound Signature: Precise mids, controlled bass, clear highs
- • Best for: Home audio enthusiasts and small studio setups seeking clean, high-power output
- • Not ideal for: Users who need integrated hands-free functionality
Delivers stereo output for passive speakers with adjustable tone controls and Bluetooth streaming. Compact metal construction comes with a 24-month warranty for added peace of mind.
Room-filling power – Thanks to Dual TPA3116D2 Class D amplifiers
Two integrated TI TPA3116D2 chips run in a stereo Class D configuration to deliver rated output into a 4 ohm load, while keeping power consumption and heat low. Measured performance includes a total output quoted at 100W x 2 at 4 ohms and a THD under 0.04 percent across the audible band.
High, clean output makes it suitable for bookshelf or floor-standing passive speakers, producing loud, distortion-free playback for small to medium rooms.
Wireless simplicity – With Bluetooth 5.0 ATS2853 chip
An integrated ATS2853 Bluetooth 5.0 chip supports audio streaming from common sources such as phones, tablets, MP3 players, laptops and PCs. The Bluetooth link is specified to reach up to around 50ft (15m).
Stream music wirelessly from multiple devices with reliable range, removing the need for a dedicated source near the amplifier.
Tone control on hand – With physical bass and treble controls
Front-panel bass and treble knobs allow variation of low and high frequency levels without digital menus or app control, offering immediate analogue adjustment. The wide frequency response of 20Hz to 20kHz supports audible changes across the spectrum.
Quickly tailor the tonal balance to suit different speakers and rooms, making it simple to add warmth or clarity as required.
✨ The 4 Key Reasons for Fosi Audio Bluetooth Amplifier BT20A
- Dual TPA3116D2 amps, Deliver 100W x 2 output with low distortion
- Bluetooth 5.0 ATS2853, Stream from phones and laptops up to 15m reliably
- Bass and treble controls, Fine-tune sound to room and speaker type quickly
- All-metal compact chassis, Durable, space-saving design for shelf, desk, or garden setups
📋 Technical Details at a Glance
- Category: Wireless stereo amplifier
- Output Power: 100W x 2 at 4 ohms
- Amplifier Type: Class D, TPA3116D2 chips
- Bluetooth Version: Bluetooth 5.0
- Bluetooth Chip: ATS2853
❓ Frequently Asked Questions
Q: How far can Bluetooth streaming reach?
A: Streaming range is quoted at up to 50ft (15m) using the integrated ATS2853 Bluetooth 5.0 chip.
Q: Can it drive passive bookshelf or floor-standing speakers?
A: Yes, the amplifier is rated at 100W x 2 into 4 ohms and user feedback highlights distortion-free output with bookshelf and floor-standing speakers.
Q: What warranty and build quality are included?
A: An all-metal chassis is supplied for durability, and a 24-month warranty is included according to the product description.
🏆 Our Verdict
Suited for home audio enthusiasts and small studio setups that need high, clean output in a compact package. The combination of dual TPA3116D2 Class D amplification, Bluetooth 5.0 streaming, and simple tone controls sets it apart for straightforward, powerful playback. Durable metal construction and a 24-month warranty support long-term value for those upgrading passive speaker systems.
