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Isolating Digital Noise, need help.

I'm hearing noise from my ARC CDP thru my speakers presenting as a high frequency "whine" or "soft screeching." I need to isolate my digital from the AC line it shares with my analogue components. Running another dedicated line is not an option at this time.

I was wondering if a power strip with isolated receptacles, such as star-grounding, would be an alternative to a separate AC line.
As a test, I now have the CDP connected to a different outlet in my house and the noise thru my system is eliminated.

Would this type of power strip be an effective solution, and if so, I could use some recommendations. I have several layers of Blue Circle power conditioning, so I would need a strip with surge/EMF/RFI protection.
128x128lowrider57
lowrider57's avatar
lowrider57 OP
5,417 posts
 
@jond, the output of the ARC is high; 2.7V unbalanced. But the Atma-Sphere has a switch for -6dB attenuation on the input.

With the Audience PC, had the cheater on and off; still had the high-pitched noise.
Stock cable, no cheater plug.
jea48
4,425 posts
 

I understand the principle of ground-loop in this case because they are connected by an unbalanced line.
Please explain it to me, because I don't understand it.
lowrider57's avatar
lowrider57 OP
5,417 posts
 
jea, I hope that's a rhetorical question, because I'm going by what I read in the Whitlock paper.
Ralph thinks my Sunfire amp may have an atypical grounding design.
ptss
1,964 posts
 
Have you tried a cheater plug on your digital-without changing anything else?
lowrider57's avatar
lowrider57 OP
5,417 posts
 
ptss,
yes, using cheater plug on the Audience cable from ARC CD will get noise.
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