If you choose the 100W*2 amplifiers you can connect 8 speakers up to 100W, without a problem. Instead of connecting the amplifiers with Bluetooth; connect with a separate Bluetooth module. It functions as the source of the sound. The Stereo headphone amplifier sends this signal to all the four amplifiers. An easy way to connect 8 speakers without compromising on power. All speakers function the same as if they were connected singly.