//// I am not a soundman by any means...but I can run a "PA" to a certain extent. I have a crown XS 500, 500 watts per side. I was using it for PA purposes. I was running monitors on the side that I think i blew. This side was getting the OUTPUT of a Alesis 6-8 channel multi-mix (something like that) HEADPHONE send. so the headphone OUT of the Alesis was going to the input of the Crown. The other side of the amp was running mains so I did not <hear> anything strange, especially since I didn't have a monitor pointing at me. I looked at the Crown amp and noticed the clip light coming out. I deduced that the headphone out from the mixer was clipping in a <big> way. It was clipping on the multi-mix AND the amp. I turned off the mains and there is now almost nothing coming out of the monitor side of the amp. There is signal but you can only hear it if you crank the amp and even then the level of hiss pretty much drowns it out. What have I done? Is it repairable? I can't imagine that the cost of repairing would even be worth it considering the cost of a new/used comparable amp.