2. home-theater
  3. 166032-126

Eliminating Ground Loop Problem

I use a Marantz 7702 MKII processor, ATI 3-channel amplifier to drive my center and rear channels, and my Jeff Rowland Corus preamp with HT bypass when watching movies. I'm using RCA interconnect cables from the Marantz to the ATI, tried balanced XLR cables with no change. I contacted Marantz and they didn't provide any advice. ATI helped me troubleshoot the issue and we isolated the problem to the Marantz. Any advice on how to eliminate the ground loop issue? 
ricred1
gdnrbob
4,417 posts
 
Did you try a cheater plug or a Hum X?
I also would recommend Pm'ing member Atmasphere or calling him (Google Atma-Sphere).
He helped me track down a hum issue.
Bob
oldhvymec
5,101 posts
 
How’s that routing OP? Do you have cables laying over cables?

Cable art.. I should teach a class. It’s fun too.

Make sure nothing is touching, NOTHING. If cables cross make sure there is at least an inch between them and at 90 degrees.

Run them side by side, but NO touching, especially Power Cables (not cords) and Speaker Cables..(not wire).

You can check pretty easy by, lifting and lowering cables.. The sound will Yo Yo..

Regards
ricred1 OP
1,988 posts
 
gdnrbob.

Thanks so much for the information. I will certainly reach out to him.
ricred1 OP
1,988 posts
 
oldhvymec,
Yes, I'm embarrassed to admit my cables are all over the place. It's a complete mess behind my equipment rack. I will try to organize the wires the way you recommend. 

My question is why when listening to 2-channel is everything dead silent?
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