I sitll have "alternator whine" in mine but only when it's in aux mode. I only use that when I'm listening to talk radio these days or an occassional sports game so I haven't been in too much of a hurry to correct it (basically b/c I don't have the time).

I think there was a thread about it? Possibly that a ground on the mother board of the empeg could be blown? Not real sure though.

Interestingly enough, I tore the amp apart and resoldered the rca's onto the board and the whine went away.... Until I bought new speakers and began to play with the amp again. Maybe a new amp will correct my problem as well. The only thing that leans me away from the amp now is that it's only in aux mode. Weird.