A funny thing happened to me tonight... I was watching a few exciting LOTR scenes at 5 db below reference. Much louder than I usually listen, just wanted to see how the system would hold up. Everything calibrated and the sub EQ'd flat. I had the sub about 7 db hot, which is no prob for it! All of a sudden, the sound disappeared! I looked at the receiver and it said "OVERLOAD", I think it was flashing. Then the receiver shut off. My heart stopped... I got up and felt the top of the receiver. It was not very hot at all. No more than usual. I turned it back on and all looks well, though I decided to shut her all down for a while. If it matters the receiver is a Pioneer 850s, 110w/ch * 6. I wonder why it would do this? All speaks are set to small so I thought it would handle reference levels ok.