I don't have any personal experience with Krell amps humming, but a friend of mine says that he occasionally catches his amp humming "I Can't Get No Satisfaction"... (sorry, couldn't help myself).
anyone have any experience with Krell Amps humming
I just got a new Krell Theater Amplifier Standard, and when connected to my system it hums at about 52db, it's not ground loop related as it does not vary with volume at all. (at least I think that's correct) I've done everything everyone will suggest from line conditioning all the way down to reverse engineering my sytem and there is no way to eliminate the hum, I can add to it and have identified a couple of other issues I'll have to resolve, but it's always there. Just curious if that level hum is normal, or if anyone else has any experience with Krell like this, and if so, what they did. I'm about to take the amp back for exchange.