excessive hum-buzz in speakers


I have a sony 400cd ES changer connected to a classe cp35 preamp which is connected to a sunfire stereo amp which feeds a set of carver alIII's

The classe has an mit a/c cord and my whole system is connected to two panamax 1000's which connect to a hospital grade wall switch.

I also put those funky cardas rc plugs on every unused rca input connector on the classe and the sunfire.

But still I have some serious hum coming from the speakers.
Before, when I only had my yamaha rxv 2095 with the pre-out mains going to a carver tfm35x and a pair of psb golds, my system was relatively quiet. Although the overall sound has improved, the humming is driving me CRAZY!!!

Please help!!!
elmexica215a

Showing 1 response by ampzilla747

usually if all your equipment is running on the same outlet,you wont get ground loop problems,they are caused by differences in potential,between different outlets!i also had a problem with a loud hum,i thought my amp was going out but it turned out to be the cheap banana plugs i was using at the back of the amp!got rid of them, bare wired them in,and tada!no noise,well,except from my frayed p.s audio cable from x-former to preamp.but using my thalia now,its DEAD silent!!!