You mean you replaced the amplifier? I'm wired for cd, but don't have one, but if this is what you mean, it's certainly something I think is high on my list of probable issues, though have some more diagnostic work I can do.
Anyway, I'm glad you got your problem solved!
Upcoming NYC dates: Jan 8 and 27. See Facebook for other shows and PM me if you can make one...love to see you there!
Mangofy your E46!