ZK-TB21S Bluetooth 5.1 Stereo Audio Receiver Amplifier Board 2.1Channel Amp Module for Speakers TPA3116D2 50Wx2+100W

Advantages of ZK-TB21S compared to ZK-TB21: 1. Added U disk/sound card interface
2. Added encoder for up and down song selection, for pause/play, for AUX/BT/USB audio source switching selection
3. The mid-range adjustment of the stereo part has been added, and combined with the subwoofer + treble to form a full coverage of the low, medium and high sound effects, compared to the TB21, the increased translucent vocals are prominent.
4. Compared with TB21, the APP function is added. The APP supports changing the bluetooth name, password, prompt tone size, prompt tone switch, sleep aid song, mode switching, sound effect selection, U disk list, etc.
5. Added AUX external lead XH2.54-3P socket.

6. The frequency adjustment of the subwoofer is changed to the internal debugging of the board. After debugging, the customer will not change it at will.
7. Remove the stereo bass adjustment (many customers feedback that the stereo bass is unnecessary, because it is repeated with the subwoofer), and change it to the midrange to make the sound more transparent.
color:Black
Material:plastic
size:119 x 100 x 22mm

Package Contents:
1 x ZK-TB21S Bluetooth 5.1 Stereo Audio Receiver Amplifier Board