In this project I want to make a bluetooth 2.1 amplifier with a simple and compact design that only requires 3 chip-amp ICs, namely LM1875 as the satellite and TDA7294 for the subwoofer amplifier.

The subwoofer's cut freq can be adjusted by turning the available trimpot.

There is a separate volume control for the satellite and volume for the subwoofer.

This amp includes a bluetooth receiver system at its input, and for the bluetooth module it uses a third-party bluetooth module, namely JDY-62A which is cheap and can easily be found in the market.

This 2.1 bluetooth amp requires a symmetrical 18V-0-18V transformer at least 5A because this amp can give total power about 110W pure (20W+20W satellite and 70W subwoofer)

So what does that sound like? please check the video on BARLEX RESPECTAIZER YOUTUBE CHANNEL