bluetooth mp3 amplifier module connected to 4 sound boxes 

To connect 4 sound boxes with the bluetooth mp3 amplifier, you need to make a continuous connection of the sound of a positive sound box with the other negative sound and we will also do this with the outas 2 sound boxes😊 don't worry and I'll teach you step by step To make this connection of the 4 sound boxes in the mp3 amplifier module in a simple and easy way😊 those sound boxes that I used in the amplifier module were for home theater and the perfect sound with the amplifier board 😊