anyone have any experience with Krell Amps humming

As it is a 5 channel amp, are all of the 5 channels being used? If so, are they all being fed balanced XLR or single ended RCA's?

The amp comes with grounding pins to insert into the balanced inputs that are not being used.

Give us some answers to our questions, especially the cheater plug and we can troubleshoot the issues with you.

Cheater plug did nothing to change it. All gear is in one circuit, but have had Bryston, Pass Labs, Sunfire and B&K in same circuit in previous few days with no hum. Using RCA's as interconnects, can see no pins inserted in XLR's and none were in box, there is only the small silver piece at each xlr, that I'm assuming is somehow related to the connection. Don't have a dedicated circuit to put it on for now. All other gear is being run through line conditioner, have tried amp both straight into wwall and into conditioner. Odd new facts, the mnore interconnects run into the pre/pro the more hum, and when my subwoofer is connected and powered up, hum is almost 80db. Very strange, as I said I've had multiple amps on this circuit and configuration this week, and absoutely zero noise.

You must have the pins if you are going to use the rca's or you will get hum. Did you buy this new? Krell sounds best balanced. The shorting pins go in pin 1 and pin 3.

Dave

Your Krell is a theatre standard, I assume that's a mutli-channel amplifier. Does your Krell draw more juice than the other amplifiers you tried? And, do you have a powered sub-woofer?
Did you have a powered sub-woof plugged into the same circuit
when you tried the other amplifiers? Amplifiers and powered sub-
woofers draw a lot more juice than anything else in your system.
If your Amplifier draws more juice than the other amps you tried
and/or if you have a powered sub-woofer plugged in with the Krell, but you didn't with the other amplifiers, you don't have an apples to
apples comparison. It is curious that adding the Sub-woofer makes the hum worse.

didn't change anything from one amp to the next. Krell is sending pins for xlr connects and hopefully that solves this. meantime, havig a dedicated circuit put in for amp with Hubbell HG outlets, if that doesn't kill any noise, I give...