Headphones / Earphones
Headphone Amps
DAC built-in headphone amplifiers
Fosi Audio/BT20A MAX Bluetooth Stereo Power Amplifier

Fosi Audio / BT20A MAX Bluetooth Stereo Power Amplifier

The "BT20A MAX" is a Bluetooth stereo power amplifier equipped with an enhanced cooling system, capable of delivering clear, high-resolution audio playback.

【Pure Sound】
・Featuring PFFB technology and dual independent power supplies, this stereo amplifier achieves ultra-low distortion (≦0.003%) and a high SNR (≧112dB). It minimizes noise interference, delivering clear, high-resolution audio playback.

【Enhanced Cooling System】
・Equipped with TPA3255 and NE5532 chips, the BT20A MAX delivers a high output of 300W per channel. Its reinforced design—incorporating a built-in, quiet-running fan—improves cooling efficiency by approximately 30% compared to the PRO version, ensuring stable operation even at high output levels.

【High-Resolution Bluetooth Connectivity】
・Powered by the Qualcomm QCC3095 chip and supporting Bluetooth 6.0, it is compatible with a wide range of codecs—including LDAC, aptX Lossless, aptX HD, aptX Adaptive, aptX, SBC, and AAC—and supports sampling rates up to PCM 24-bit/96kHz. It provides a stable, low-latency wireless connection.

【Versatile Connectivity】
・Equipped with dual RCA inputs and a dedicated subwoofer output, it features a motorized analog volume control. Precise volume adjustments can be made via the included remote control, making it an ideal choice for building a 2.1-channel home audio system.

【Dedicated Decoding Capability】
・Equipped with a flagship-grade CS4398 chip, it supports high-resolution Bluetooth audio and high-spec 24-bit audio decoding. With a dynamic range of up to 120dB and a THD+N of just -107dB, it minimizes distortion and noise, faithfully reproducing rich, intricate details. [All-in-One Audio Control]
- Enjoy pure sound quality in Bypass mode, or customize bass and treble settings in Tone mode. A 12V trigger input enables synchronized power on/off, while HPF (High-Pass Filter) adjustment allows for the optimization of speaker performance.

■ Channels: 2.1
■ Amplifier Chip: Texas Instruments TPA3255
■ Maximum Output Power: 300W x 2 @ 4Ω
■ Rated Output: 180W x 2 @ 4Ω
■ Inputs: RCA1 / RCA2 / Bluetooth
■ Outputs: Speaker Output / Subwoofer Output
■ SNR: ≥112dB
■ THD+N: ≤0.003%
■ Terminal Impedance: 2–8Ω
■ Bluetooth Chip: Qualcomm QCC3095
■ Bluetooth Version: 6.0
■ Effective Bluetooth Range: ≤15 meters
■ Bluetooth Codecs: SBC / AAC / aptX / aptX HD / aptX Adaptive / aptX Lossless / LDAC
■ Frequency Response: 20Hz–20kHz (±0.5dB)
■ Voltage Range: DC 32V–48V