Hi Messelt, I am grasping at straws of course, but I suspect that the Oval 2 may be a better choice for the BC amps than the Oval 10. . . I know that Oval 2s are often recommended with other class D amps like the JRDG 201s and 501s. . . I even heard Oval 2 on the big JRDG 312 and it works quite well. If i interpreted the descriptive page on PCs on the Analysis Plus web site correctly, the Oval 2 PC has a braided shielding. I just recently read somewhere on Audiogon that shielded PCs may be appropriate for some switching amps. As far as I know, the Cardas Golden Refs are shielded, and they sure work well on the BC Ref 1000 Mk.2s in my system.
Yet, I also suspect that the Kimber USB cable may be part of your problem set. . . . I heard very good things instead of the Ridge Street Audio USB wire. . . mind you, I am not speaking out of personal experience. G.