How can I take advantage of devices or devices that produce stereo output? A single S1 Professional+ multi-posture PA System can Merge The 2 channels and fill the location with 1 speaker. Inspite of marketing claims and what you see on many audio websites, the effect that a Bluetooth codec https://www.bluetoothspeaker.top/factory-private-mold-bluetooth-speaker-2200mah-battery-led-speaker/