My hum problem is solved. I checked all the usual suspects including completly disconnecting my sat antenna but that didn't cure it so I checked the rest of the cabling and found one of the cables from the 990 to the 770 was not fully inserted in the back of my 990. Even with all the panel space on the back of the 990 those big Canare connectors and boots that Bluejeans uses make it a tight fit. When I seated it correctly there was complete silence.

I stayed up until 2:30AM last night listening to music, mostly SACDs, and thus far I am very pleased with what I've heard. Tonight a movie or three.

mike