Fosi BT20A MAX Bluetooth Stereo Power Amplifier
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The Fosi Audio BT20A MAX represents a significant leap forward in the world of compact Hi-Fi, blending high-performance engineering with modern convenience. Powered by the renowned TPA3255 chip and enhanced with PFFB technology, this Class-D amplifier delivers a robust 300W per channel while maintaining remarkable sonic clarity and a neutral frequency response. Whether you're looking to drive demanding tower speakers or build a precise 2.1 desktop system, its integration of high-resolution Bluetooth 6.0 (LDAC), a motorized volume control, and a dedicated subwoofer output makes it a versatile powerhouse for any audiophile's setup.
The Fosi Audio BT20A MAX is built around the high-performance Texas Instruments TPA3255 Class-D architecture, refined by the implementation of Post-Filter Feedback (PFFB) to virtually eliminate load dependency and achieve an ultra-low THD+N of ≤0.003%. It pushes the boundaries of wireless fidelity by utilizing the Qualcomm QCC3095 SoC, supporting Bluetooth 6.0 with LDAC and aptX Lossless codecs for near-bit-perfect transmission. Designed for thermal stability, the unit integrates an active cooling system and a 12V trigger for seamless integration, while the dedicated 80Hz High-Pass Filter (HPF) and motorized potentiometer ensure precise signal management across a full 2.1-channel configuration.
Features
- Power: Features the TI TPA3255 chip, delivering a peak output of 300W x 2 at 4Ω (180W x 2 RMS).
- Bluetooth 6.0: Uses the Qualcomm QCC3095 SoC, supporting high-res codecs like LDAC, aptX Lossless, aptX HD, and aptX Adaptive.
- Sound Quality: Incorporates PFFB (Post-Filter Feedback) technology to minimize distortion (≤0.003%) and maintain a flat frequency response regardless of speaker load.
- Cooling: Features an active cooling system with a built-in silent fan, improving efficiency by 30% over previous models to ensure stability during high-power use.
- Motorized Volume Knob: A standout feature that allows precise adjustment via the included IR remote.
- 2.1 System Support: Includes a dedicated subwoofer output and a selectable 80Hz High-Pass Filter (HPF) to offload low frequencies from your main speakers.
- Tone Controls: Features bass and treble knobs with a bypass switch for those who prefer an uncolored, "pure" signal path.
- Connectivity: Offers dual RCA inputs and a 12V trigger for synchronized power-on with other audio gear.
Specifications
- 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 32 V–48 V
Includes
- 1 x BT20A Max Power Amplifier
- 1 x Bluetooth Antenna
- 1 x Power Adapter
- 1 x IR Remote
- 1 x User Manual
Support
Video
About
Fosi Audio, established in Shenzhen in 2017 by Ryan Huang, has emerged as a pioneering force in democratizing high-fidelity sound. Guided by four core tenets—Foresight, Openness, Sincerity, and Innovation—the brand has cultivated a distinguished presence across 150+ nations. Renowned for exceptional sonic value and community-driven engineering, Fosi integrates premium components from industry leaders like Texas Instruments. Their philosophy transcends conventional audio retail, offering both refined finished products and bespoke DIY solutions for the discerning enthusiast seeking uncompromised quality without premium pricing.