Originally Posted by VicTorious1
I've also seen people ground the receiver to the screw holding the outlet plate cover onto the wall.
Well, actually it was slightly more involved than that. Step by step..
1. Unhooked and checked all XLR and speakon cables, to include the XLR Y-cable that connects the two 3k's and plugging just the hum amp directly to the receiver. No change
2. Unplugged all 4 HDMI cables at once. Had my daughter listen as I plugged each of the cables back into their respective inputs in the receiver one by one. Starting with the 4th cable and working my way back up to the 1st introduced the hum incrementally louder. Unplugging the corresponding components (blu ray player, hd-dvd player, xfinity box) didnt relieve the hum so I kept fiddling.
3. Didn't want to open a perfectly good roll of 12awg wire so I found an old brown 16awg extension cord, stripped it and ground the receiver to the offending 3k amp. HUM 95% ELIMINATED
Thanks for the brain spark Vic! My frustration and apparent lack of sleep really made this seem like an insurmountable obstacle for a few hours. Now I know how my teenage daughter feels when she can't find her iPhone lol
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