Right now, im pretty pissed. I leave the room, and my dad walks in and turns from a dvd video input to the cable box video input, and wonders why there isn't sound (because the receiver input is still on DVD), and turns up the volume all the way on the receiver. Then, when I walk in, to switch the input real quick, the loudest, most distorted sound i've heard in a while emerged from my system. The receiver shut off automatically and when I turned it back on, a message appeared saying (check SP Wire). How do I know if the speakers are blown? I know those speakers can only support up to 100 Watts of power per channel, and I know my receiver outputs more than that. It sounds "ok" right now, but I don't know. How can I tell of any long term damage or blown speakers? Remember, the volume was up all the way.