So, my Axiom sub is humming again... I thought I had solved this problem awhile ago, but after installing my new Oppo BDP83 (which I LOVE!!)it has started acting up again. I am going to try a cheater plug, but the Oppo already has an ungrounded plug. I am at a loss. I need advice about where to go next.
Thanks!

EmotivaLMC1/LPA1,YamahaS2500,Oppo BDP-83,MSHTS-5000Axiom Epic 80/350+Paradigm PS1200 sub