Fosi Audio BT20A Pro Bluetooth Integrated Amplifier

About The Fosi Audio BT20A Pro Bluetooth Integrated Amplifier

The Fosi Audio BT20A Pro 48V Bluetooth Integrated Amplifier is compact yet surprisingly powerful, delivering up to 300 watts per channel thanks to its Texas Instruments TPA3255 amp chip. This isn’t just brute force, though — the TPA3255 is known for its advanced feedback design and high-speed gate driver error correction, which means you’re getting both muscle and finesse. The result is clean, dynamic sound with ultra-low distortion across the audio spectrum, all while keeping idle power consumption under 2.5W. It’s an amp that’s as efficient as it is capable, making it a smart choice for anyone looking to get big sound from a small footprint.

One of the BT20A Pro’s standout features is its flexibility in sound tuning. Thanks to its tone controls, you can easily tweak bass and treble to suit your taste, whether you want your music warm and rich or crisp and bright. For purists, simply set both controls to their midpoint and enjoy the original sound with no added colouration.

Bluetooth connectivity has also been given a boost, with the BT20A Pro featuring the latest Bluetooth 5.0 standard. Pairing is quick and painless, and the amp remembers your devices for easy reconnection. If you need to clear the pairing list, just press and hold the volume control for five seconds. It even provides an audible tone for confirmation, which is a small but handy touch. With support for SBC and AAC codecs, you’re getting solid wireless audio quality, and of course, you can always go wired via the RCA inputs if you prefer.

Connectivity doesn’t stop there. The BT20A Pro includes a full-range pre-out, making it easy to hook up a powered subwoofer, another amplifier, or other compatible audio gear. This opens the door to more elaborate audio setups, whether you’re looking to boost the low end for home cinema or expand your system into multiple zones. For a small amp, it’s surprisingly versatile, handling everything from simple desktop speaker setups to more complex living room configurations.

Out of the box, you get the amplifier itself, a Bluetooth antenna, a 48V 5A power adapter, an AC power cable, and a user manual - plus the reassurance of a 24-month warranty and responsive customer service. In short, the Fosi Audio BT20A Pro is an impressive blend of power, efficiency, and tweakability. It’s a compact powerhouse that delivers quality sound, offers plenty of customisation, and slots neatly into just about any home audio setup. Whether you’re upgrading from an entry-level amp or building your first serious system, this little unit is more than ready to deliver the goods.

Our Review

The Fosi Audio BT20A Pro Bluetooth Integrated Amplifier may be small in size, but it packs a serious punch, delivering up to 300 watts per channel with the help of its refined Texas Instruments TPA3255 amp chip. It’s got both strength and subtlety, offering clean, dynamic sound with ultra-low distortion, while sipping power at under 2.5W when idle. With flexible tone controls, you can shape your sound to taste or keep it pure and uncoloured, and Bluetooth 5.0 makes pairing quick, stable, and fuss-free. Wired RCA inputs and a handy pre-out expand your options for adding subs or extra amps, making it surprisingly versatile for a unit this compact. Add in the neat design, generous accessories, and a reassuring 24-month warranty, and you’ve got a little powerhouse that feels right at home in anything from a desktop setup to a full living room system.

Main Features & Specifications

• Design: Compact High Performance Integrated Amplifier with Bluetooth
• Output Power: 2 x 300 Watts @ 4Ω
• Terminating Impedance: 2-8Ω
• Input Modes: Bluetooth + RCA
• Output Modes: Passive Speakers + Pre-Out
• Frequency Range: 20Hz-20kHz (±1.2dB)
• Total Harmonic Distortion: ≤0.005%
• Signal to Noise Ratio: ≥108dB
• Chip Set: Texas Instruments TPA3255 Amp Chip
• Bluetooth Transmission Distance: Up to 15 Metres
• Bluetooth Transmission Format: SBC/AAC
• DC Input Range: 24-48V
• Power Supply: 32V 5A or 48V 5A
• Included Accessories: 48V/5A Power Adaptor, Bluetooth Antenna, User Manual
• Dimension (WxHxD): 127 x 25 x 127mm
• Weight: 0.6 kg
• Manufacturer's Warranty: 2 Years

Note: Features & Specifications Subject To Change Without Notice. E&OE.