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Buzzing IC's

Hi, I have an ARC LS25 mkII preamp and I've tried two different sets of the WBC Mogami 2549 shielded cables from Amazon. I'm using these between the preamp and my KEF KC62 subwoofer. They buzz when installed but when I throw on a pair of unshielded IC's no problems at all. Any idea what could be causing this? Thanks!

cetla416
cetla416 OP
23 posts
 

Thanks! I thought that would be it. I tried a cheater plug on the subwoofer and the preamp. no difference. Crazy! I give up. 

mofimadness's avatar
mofimadness
4,938 posts
 

Looks like the sub has a "ground lift" switch on it?  Does that matter if it's on or off?

cetla416 OP
23 posts
 

Tried that too. I'm using some inexpensive unshielded IC's now that have no issues but they are way to long. 

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