ZK-ST21 TPA3221 Bluetooth Power Amplifier Board with Subwoofer 2.1 Channel 100W×2+200W, 12V-30V Audio Power Amplifier Module with Treble and Bass Control

[TPA3221 HIFI CHIP] The TPA3221 Chip Solution: Stereo 2.1 -channel Output to Ensure Continuous Serial High-power Operation, Wide
Voltage Input DC: 12-30V. This power amplifier board uses two TPA3221 high-fidelity chips with maximum output power up to 100W*2+200W. [MULTIPLE INPUT METHOD] The ZK-ST21 has multiple input methods such as Bluetooth input, AUX input, and USB drive input. The vast majority of devices can be used, such as mobile phones, televisions, laptops, etc., making it easy to connect and use. [TREBLE & BASS CONTROL] If you are tired of an amplifier with only one volume knob, then you feel right, because you have further requirements for audio. By adjusting the high and low frequency knobs of the power amplifier board, you can make the sound more layered and make the bass more shocking. [PROTECTION FUNCTION] ZK-ST21 Bluetooth power amplifier board has multiple protection mechanisms to ensure its safe operation. It has short-circuit protection, over-current, over-heat, and anti-reverse protection. When an overload occurs, the device reports the fault condition to the processor to protect itself from damage