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Distortion from speakers - amp?

Friends, I have a new amp (Halcro MC20) and preamp (Atma sphere R13) that I have mated to my beloved Newform Research speakers. My previous set up was a Pass Aleph 5 and Blue Circle 21 preamp. While the new configuration sounds wonderful, I am hearing very audible distortion, greater with one channel. With the ribbons, it is a buzzing sound, and in the bass drivers like a feedback hum. Again, when I change the channel cable connections between the pre and amp, the sound changes sides as well. It does not seem to be dependent on volume setting. Turning it up does not increase the distortion. The preamp is stone quite but the amp has a bit of a buzz when it is on. Ideas? Thanks much.
deliberate1
deliberate1 OP
33 posts
 
Plato,
Thanks for your insight. The cables are Anticable balanced IC's. Not sure if they are shielded or not (do not even know what that mean to be honest). Is there a way to replicate the shielded function? Since they are XLR ends, they can not be reversed. I will try moving the AC cords as far away from the interconnects as well. Thanks again.
swampwalker's avatar
swampwalker
5,138 posts
 
I do not believe that Anti-cables have any shielding at all.
atmasphere's avatar
atmasphere
11,841 posts
 
What's an Atma-Sphere R13?? You'd think I should ought to know that one but I don't.
deliberate1 OP
33 posts
 
"What's an Atma-Sphere R13?? You'd think I should ought to know that one but I don't."

Shhhh. You of all people should know that it is a secret version of the MP-3 for people who can not remember what the hell they have.
atmasphere's avatar
atmasphere
11,841 posts
 
OK :) I would try a set of shielded cables just to be safe. Unshielded cables, even balanced, can sometimes pick up noise.

Otherwise I would guess that its in the preamp. If that's the case I would try moving the 6SN7 tubes from one channel to the other and see if the problem moves.
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