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Hum Noise from Plug or Wire Area ? ?

Recently my speakers are giving this hum noise if amp and preamp are plug in where the interconnects and wires run behind my system. If I plug the amp or preamp in a different outlet the noise if gone of at least down to a "wisper". I know its not the speakers, I just can not figure what to do. I have everything plugged into a "Inland" power bar, if I plug directly to the wall plug in that area i get the hum noise.
Any suggestions as to whats going on ? ?
Thanks
hap123
hap123 OP
11 posts
 
Thanks for the reply and insight, What is a "cheater plug at in-wall outlet ? ? How do I creat this confriguration ? ?

Thanks
hap123 OP
11 posts
 
I have a cheater plug ! !
Thanks
hap123 OP
11 posts
 
I used the cheater plug and the hum has stopped! I have my power box pluged with it, and a monoblock on the same outlet pluged in with a cheater, no hum. Must be the ground loop issue.
Post removed 
hap123 OP
11 posts
 
Just when I thought life had gotten a little simple . . .
Thanks for the added advise . . . I will get on it.

Thanks
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