What preamp and IC's are you using.
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If I physically apply pressure to the power supply input and the usb input cables the hum will go away
By pressure do you mean a physical movement pressure or do you mean a physical touching pressure with your fingers to the metal outer shells of the two connectors thereby your fingers/hand working as a connecting conductor between the two connectors?
Thanks for your responses.
I started over yesterday am.. pulled everything off, added back one by one (like I should have in the first place). I was then able to localize the issue to the single ended cd input on my VSI 60. If I switch to another input the hum goes away.
I guess that I'll be contacting Audio Research to see about a repair.