50W+50W+100W Amplifier Board with Treble and Bass Control, Bluetooth 5.0 HiFi 2.1 Channel Subwoofer Stereo Amplifier Board, Dual TPA3116D2 Chip BT and AUX Inputs for DIY Wireless Speakers (ZK-TB21)

ZK-TB21 Bluetooth 5.0 amplifier board comes with 2.1 channel stereo, dual TPA3116D2 chips, THD 0.1 %.
Wide Voltage Input DC: 9-24V.
Bluetooth + AUX Input: 50W+50W+100W Bluetooth 5.0 audio amplifier board, Bluetooth + AUX audio dual input, 2.1 channel stereo output, with AM interference suppression function.
Note: When using AUX mode, please confirm that the Bluetooth connection of this module has been disconnected.
Treble and Bass Control: This digital audio amplifier board features independent treble and bass knobs; the treble and bass can be adjusted with these knobs, with no need to use the player or speaker.
Protective Function: This power amplifier board is designed with over-voltage protection, under-voltage protection, over-heat protection and short-circuit protection.
Note: In the case of audio input and power supply voltage/current being sufficient to have enough output power, the higher the supply voltage, the higher the output power. The lower the speaker impedance, the higher the output power. Please make sure that the power of the adapted power supply is greater than the actual working power of the amplifier