How can I take benefit of instruments or devices that supply stereo output? A single S1 Professional+ multi-position PA System can Blend The 2 channels and fill the venue with one speaker. If you should like to see more products, Here is the list of all our Bluetooth speaker reviews https://www.bluetoothspeaker.top/top-sale-portable-waterproof-wireless-speaker-outdoor-stereo-bluetooth-speaker/