Did you try the "star ground" configuration that Syntax suggested to rid yourself of that evil hum? When grounding is absolutely necessary, groundings all coming back to one point will eliminate creating a loop and adding additional problems, just my two cents.
Nice to see OTL's in your mix David, you must comment on the synergy of the Bernings and the Kandinskys when you get the chance. I have witnessed first hand Mr. Karstan and Mr. Berning on this very site going head to head about what is OTL... and what might not be, have never had the pleasure to hear Berning's interpretation, but would like to. Oh well. Personally, I love my Atma-Sphere Ma1 Silver Eds, with the appropriate match of speaker, they are magic! Fast, detailed top to bottom, and gobs of air... what else would one desire?
Happy Listening!
