Before you decide whether you want to use Analog control mode or Digital control mode, you should test your amplifier. By default, it will start up with about 6dB of gain, definitely loud enough to be heard!
Begin by connecting two speakers to the BTL speaker outputs of the amplifer
Don't forget to gently yank on each wire after clamping it into the terminal block, it should be a solid connection, not possible to yank out of place. Loose wires will be a problem!
Next up connect 5-12VDC power to the board using a wall adapter. Then connect up an audio source. I just used a 3.5mm male/male cable to connect it to my audio player.
Starting with low audio volume, slowly turn up the volume on your mp3 player/computer/etc until you hear audio come out. 20W is pretty loud so don't put the speaker next to your ear!
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