If you want to build a Bluetooth amplifier simply and stream your music from your smartphone, then the TinySine Bluetooth AudioB Plus receiver module is an excellent choice. It is indeed a Bluetooth 4.0 stereo receiver based on a CSRA64215 chip. The module has two sets of 10 pins, each pin spaced 2mm from the others for easy integration into your project.

In addition, Bluetooth version 4.0 will allow you to achieve very good data transfer rates and the aptX protocol supported by the chip ensures both better signal stability and better synchronization. All this contributes to a much better sound reproduction.

Correspondence table of the module pins

Schema: Unbalanced signal output

Schema: Unbalanced signal output to headphones or small speakers

Schema: Differential signal output