One channel on my mixer seems to have developed a rumbling sound - does anyone have any idea what I need to do to fix this? It is a sh-dx1200 and it has remained in the same set-up since I originally bought it (ie I'm not plugging and unplugging cables all the time). BTW I have verified it is not down to the turntable or cartridge by switching channels - other channel works fine!?!
Cheers David
