This one for the books! Two new Peavey IPR 1600 amps, each amp will work, turn both on one goes silent and the signal LED stays lit with no input at all. Yes I know I have warranty, yes I know I can get an exchange. That not what the thread is about. The IPR's are new tech and us old boys DON"T know it all! Wierd little troubles that can happen in the real world have no reason in engineering? The only way both amps would continue working is if one was plugged into a completely different AC circuit! What you think my fellow geeks?