Papa,

That seems like an awful lot of effort to go through because one componenet in jrlouie's system is succeptible to transformer buzz and/or hum. A number of people are complaining about this so perhaps the ultimate problem may be ground loops or line sags or whatever, but why is the 7500 so much more succeptible to that? A consumer audio device shouldn't require laboratory quality conditioned input power to operate properly since most homes don't have anything close to that. 8-)

Cheers,