Uncle Dave said it all. I use the BOSE with my Tyros, TC Helicon Voice works, an Alesis Multi-mixer and with my partner who sings and sounds like Englebert/Tom Jones, we sound like an orchestra. People are amazed as to how clear the sound is and where it's coming from. The only drawback is when we get a extra louder, the limiter clicks in and lays back the sound. I have the Mackie 450 and the FBT MAxx 4A, but mostly use the Bose PAS. It's light, and easy to put together. I eventually thought about a second pole, but after just reading what Uncle Dave wrote, I will now tend to not buy one just for stereo, unless I use a second pole for DeeJaying. I have the second sub-woofer.