The issue has gone away completely by using a cord that does not ground the amp.
In my setup, I dont have to use a cheater plug with the power5 and it is dead quiet, but Ive had other amps and electronics that Ive had to use a cheater on. I dont think there is anything wrong with your amp per say...Probably more about your house wiring and compatibilty with your other electronics, sometimes a cheater is needed, no big deal imo
As far as sound, this amp sounds rich, powerful and detailed with incredible instrument/vocal separation and focus. You can tell how the instruments are layered on the stage! I have not heard anything like it before.
Glad to hear that it impressed you...
...I sit down again last night and listened for several hours to all kinds of material. Let me say first that Im able to listen at much louder volumes comfortably, its screams to be turned up and I still havent heard any harshness or distortion ( I hate when a system screams to be turned down, as in hurts my ears
My fiirst impression was just re-enforced, crystal clear with lots of power and no sonic signature of its own. ...I dont know that I could ask for more in a cool running 36 lb amp.
One thing though ( I still need to read the manual ) but I know it has auto sense on/off ... does this feature just work if your hooked to the NHT controller (only) ?
I left the amp for an hour or so last night after I was done, to see if it would go into sleep mode, but it was still on ( green ) after an hour.