I am getting this strange low level hum from my speakers and am able to narrow it down to it being as some kind of noise from A/C lines or something. These are the things I've tried. 1) Made sure the grounding was OK 2) Made sure the inter-connects were snug 3) Tried cheater plugs 4) And everything else. Now I know this is not the fault of either my amplifier or prepro as I hooked up my 2802 as a prepro and the hum was much more significant. I also tried my friend's NAD amplifier but with same results.I also get this hum from my TV speakers. Is there anything reasonable priced out there that will sove my problem? Any ideas or theories? Although the hum is not that noticable during daytime, it gets very obvious at night. HELP!!