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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
 

I've tried them in both directions on my subwoofer and amps with the same results. They work fine between my DAC and preamp. I'm baffled to say the least!

jengelmann's avatar
jengelmann
57 posts
 

Had a similar problem with an AV receiver. Was a ground loop issue. Are the subs and pre amp plugged into the same circuit?

cetla416 OP
23 posts
 

I tried a pair of Tara Labs directional cable now. Same buzzing as with the WBC Cables. Unshielded cables no issue. I should lift the drain on the Tara's.

mofimadness's avatar
mofimadness
4,933 posts
 

If your sub has a 3-prong AC plug, use a cheater, (3-prong to 2-prong adapter) to see if it breaks the ground loop.

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. 

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