No hum from the marantz that I can detect. It has an auto on feature that basically turns the amp on when it detects a video signal (yes, that's right...you plug a RCA plug attached to the video out terminal of your receiver, dvd player, etc and when it detects this signal, amp turns on). I never use it...I am a power hog and I just leave the amp on all the time...I don't think that this hurts anything. There's also a 12v DC trigger that connects to other so equipped units to turn it on.

Mark

"Shoot, a fella could have a pretty good weekend in Vegas with all that stuff"