ZK-AS21P Bluetooth Amplifier Board 300W+300W+600W Output, 18-50V DC Wide Voltage Input, Vehicle Amplifier (ZK-AS21P)

2.1CH Subwoofer Audio Amplifier Board. This amplifier board features a 2.1 -channel design, enabling connection of two passive speakers and a subwoofer. Equipped with treble/bass adjustment knobs, an independent subwoofer volume control, and a 20-200Hz frequency adjustment knob, it provides optimized audio performance for audiophiles. Fine-tune the sound to enjoy deeper bass, clearer highs, and a more immersive, layered soundstage. HIFI-Grade Audio Amplifier. Powered by dual TPA3255 amplifier chipshigh-performance Class D modules that ensure ultra-low distortion across the full frequency range while delivering crystal-clear HD audio. The PCB uses advanced windowed tin-sprayed traces to enhance power output, while six low-noise JRC 2068D preamplifiers refine sound quality, boost volume, and improve gain.

Massive 300W×2 + 600W Output. Delivers 300W per channel (left/right) and a substantial 600W subwoofer output, easily driving high-power speakers and subwoofers. Requires an 18-50V DC/10A+ power supply (wider voltage input: 18-50V DC).
Note: Higher voltage/current and lower speaker impedance increase output poweralways use a PSU rated above the amplifiers operational demand. Versatile Audio Inputs. Supports Bluetooth 5.1 (faster transmission, lossless decoding, <15m range), USB flash drives, USB sound card mode, and 3.5 mm AUX input.
Pro tip: Disconnect Bluetooth when using AUX for uninterrupted playback. Advanced Protection & Cooling.
Built-in safeguards: over/under-voltage, overheating, and short-circuit protection. A quiet cooling fan (stall-proof, noiseless) sits atop the amp chips, ensuring effective heat dissipation and reliability