Fosi Audio BT20A Max : Compact Amplifier. Serious Capability.

High-Power Stereo. Hi-Res Wireless. Maximum Flexibility.

The Fosi Audio BT20A MAX is a high-performance 2.1-channel Bluetooth power amplifier designed for listeners who want serious power, clean sound, and flexible system control in a compact desktop-friendly format.

With a TI TPA3255 amplifier stage, Qualcomm QCC3095 Bluetooth 6.0, PFFB technology, dual independent power architecture, and up to 300W × 2 peak output at 4Ω, the BT20A MAX is built to deliver powerful, detailed and controlled audio for demanding stereo and 2.1-channel systems.

300W × 2 of Powerful Stereo Performance

Power That Gives Your Speakers Room to Breathe

Powered by the Texas Instruments TPA3255, the BT20A MAX delivers up to 300W × 2 at 4Ω, with 180W × 2 RMS at 4Ω.

Whether you’re driving bookshelf speakers, floorstanding speakers or a high-performance desktop setup, the BT20A MAX provides the power and control needed for dynamic, engaging listening.

300W × 2 @ 4Ω Max Output
180W × 2 @ 4Ω RMS Output

PFFB Technology for Ultra-Low Distortion

Cleaner Signal. Better Control.

The BT20A MAX incorporates Post Filter Feedback (PFFB) technology to help maintain consistent amplifier performance across different speaker loads.

Combined with the TPA3255 platform and carefully designed circuitry, it achieves an exceptionally low THD+N of ≤0.003%, helping preserve clarity and detail throughout your music.

THD+N ≤ 0.003%
SNR ≥ 112dB
SINAD ≥ 96dB

Dual Independent Power Architecture

Cleaner Power for Cleaner Sound

The BT20A MAX uses separate power paths for its digital and analog sections, helping reduce unwanted interference between different circuit sections.

Combined with Japanese ELNA capacitors, this architecture is designed to provide a cleaner power environment and a quieter background for your music.

Precision Analog Volume Control

Smooth, Accurate and Motorized

The BT20A MAX uses a motorized analog potentiometer for volume control.

Adjust the volume directly from the amplifier or use the included remote control for convenient operation from your listening position.

Hi-Res Bluetooth 6.0

Wireless Audio Without Compromise

Equipped with the Qualcomm QCC3095 Bluetooth chipset, the BT20A MAX supports a comprehensive range of high-quality Bluetooth codecs, including LDAC, aptX Lossless, aptX Adaptive and aptX HD.

Enjoy high-resolution wireless playback with a stable, low-latency Bluetooth connection from compatible smartphones, tablets, computers and other devices.

Bluetooth 6.0
LDAC • aptX Lossless • aptX Adaptive • aptX HD • aptX • AAC • SBC
Up to 24-bit/96kHz PCM