2*50W TPA3116 4.1 Digital Audio Amplifier Board Dual Channel Class D Stereo Aux TF Card Amp DC12-24V pcb assembly Customize

This digital power amplifier board with high fidelity and two-channel stereo sound quality; input voltage is DC 12~24V, audio input supports Blth, TF card, AUX 3.5mm audio line input, can be directly connected to mobile phone, MP3, etc.; power amplifier board It also comes with a volume adjustment function, which rotates the chirp potentiometer clockwise to zoom in and counterclockwise to decrease.
 
Product Name: Two-channel Blth 4.1 power amplifier board
Input voltage: DC12-24V
Amp Chip:TPA3116 
Output impedance:4~8 ohm Speaker
Current: ≥3A
Output power: 50W*2
Audio input: Blth, TF card, AUX
Number of channels: two channels
Size: 92*85*10MM
Installation aperture: 3MM
Installation hole distance: 85*5*78.5MM
 
 
Blth operation instructions:
When the power amplifier board is connected to the power supply and the Blth is not connected, the Blth indicator will flash rapidly. When the Blth connection is successful, the Blth indicator will stop flashing. When the song is played, the Blth indicator will flash slowly.
 
Note:
1. Connect the power input to the DC12-24V power supply. When the power is on, the power indicator will light red and the blue light will flash blue.
 
2. Connect the audio input to the audio source, such as MP3, mobile phone, computer, TF card, etc.
 
3. Connect the audio output to the speaker, paying attention to the positive and negative.
 
 
Blth / TF card volume hole:
 
When the audio input uses Blth or TF card, you can connect the power cord to the "+ VOL -" three holes to adjust the volume and switch songs.
1. "+" and "VOL" connection: short connection to play the previous song, long connection to increase the volume
2. "-" and "VOL" connection: short connection to play the next song, long connection to reduce the volume