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)

The ZK-TB21 Bluetooth 5.0 amplifier board features 2.1 channel stereo, dual TPA3116D2 chips, and THD 0.1 %.
Wide Voltage Input DC: 9-24V.
Bluetooth+AUX Input: 50W+50W+100W Bluetooth 5.0 Audio Amplifier Board. It provides Bluetooth and AUX audio dual input, 2.1 channel stereo output, and contains AM interference suppression.
Note: When using AUX mode, please ensure the Bluetooth connection of this module is disconnected.
Treble and Bass Control: This digital audio amplifier board has separate treble and bass knobs. The treble and bass can be adjusted directly with these knobs, removing the need to adjust through the player or speaker.
Protective Function: This power amplifier board is equipped with over-voltage protection, under-voltage protection, over-heat protection, and short-circuit protection.
Note: Adequate audio input and power supply voltage/current are needed to achieve full output power. The higher the supply voltage, the greater the output power. The lower the speaker impedance, the greater the output power. Please confirm the power of the adapted power supply exceeds the actual working power of the amplifier