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-Reduce Distortion with PFFB Feedback
-Deliver High-Power 2.1 Output
-Enable Hi-Res Bluetooth Streaming
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Effortless Connectivity across All Scenarios
Meticulously tuned by our acoustic engineers, it brings you a neutral and detailed sound that makes your music feel closer—more alive and vivid.

BT20A MAX features a Qualcomm QCC3095 chipset with Bluetooth 6.0. Supporting a range of high-quality codecs including aptX, aptX HD, aptX Adaptive, aptX Lossless and LDAC, it ensures a stable, low-latency, and high-resolution listening experience.

Purity Sound: Featuring PFFB technology and dual independent power supply, this stereo amplifier delivers ultra-low distortion (≤0.003%) and high SNR (≥112dB). It can reduce noise interference, resulting in a clean, detailed audio performance.
Enhanced Cooling System: Powered by the TPA3255 & NE5532 chips, the BT20A MAX delivers 300W per channel. Its enhanced design includes a built-in silent fan, improving cooling efficiency by 30% over the PRO version for stable, high-power performance.
Hi-Res Bluetooth Connectivity: Equipped with Qualcomm Chip QCC3095, Bluetooth 6.0 with support for LDAC/aptX Lossless/aptX HD/aptX Adaptive/aptX/SBC/AAC codecs, max sampling rate PCM 24bit/96kHz. Delivering a stable, low-latency connection.
Versatile Connectivity: Featuring dual RCA inputs, dedicated subwoofer output, and the motorized analog potentiometer allows precise adjustments via the included remote control, perfect for building a 2.1 amplifier home audio system.
All-in-One Audio Control: Enjoy pure sound with Bypass mode, while customizable bass & treble controls in Tone mode. The 12V Trigger input enable synchronized power on/off, and the HPF adjustment for speaker performance.







Channel: 2.1
Chipset: TI TPA3255, NE5532
Max Output Power: 300W × 2 @ 4Ω
RMS Output Power: 180W × 2 @ 4Ω
Input: RCA1 / RCA2 / Bluetooth
Output: Speaker Out / Sub Out
SNR: ≥ 112 dB
THD+N: ≤ 0.003%
Terminal Impedance: 2–8Ω
Bluetooth SoC: Qualcomm QCC3095
Bluetooth Device Name: Fosi Audio BT20A MAX
Bluetooth Version: 6.0
Bluetooth Connection Range: ≤ 15 m (50 ft)
Bluetooth Audio Codecs: SBC / AAC / aptX / aptX HD / aptX Adaptive / aptX Lossless / LDAC
Frequency Response: 20 Hz–20 kHz (±0.5 dB)
Voltage Range: DC 48 V