Hi Kelly,

Wayne's right about the expensive stuff. never a problem with a receiver and always , lets just say challanging with seperates!

This time its coming from from the expensive tube amp. This is the only one that is not connected with balanced lines from the crossover.

I still have a couple different ways to try and connect the bal/unbal together. There is still always "gasp" ground lifting.

Your right though, it's in the cabling because this amp doesnt have a hum when its all by itself.

Bill