It sounds to me like the amp went into protection mode. It's happened to me before, the M80's will eat up some power, they are efficient, as is it doesn't take much to wake them up, but when I listen to music loud, it has kicked my channels off a few times. I notice this mainly when I listen to music in the 5 channel mode. The amp will cut off only certain channels until that is cool enough to play again.


Rick