No matter what anyone says, *all* amplifier transformers hum. Just whether they are loud enough to hear or not. You might have a "louder" (than normal?) one.

But just to be sure, not a ground loop? Your AC line is properly grounded?
_________________________
If it's not worth waiting until the last minute to do, then it's not worth doing.

KevinVision 7.1 ... New and Improved !!