Hi Jrlouse

Hope i'am not bothering you.
I was just wondering if you ever figured your buzz problem out
I seem to have the same problem with my new 7500
it comes and goes i did the ex-cord thing and it seemed to help ...... so i put in a separate 20amp circuit JUST for the Amp (its Better but it still comes around every once and awhile)
I Hate it ...... like tou said its "NOT LOUD" but it is there and not part of the Movie/Music
Thanks
SUPERTOM