You might want to look at the preamp the PS Audio was based on, the Aesthetix Calypso which has balanced and single ended inputs and outputs. Also I have heard good things about the Wells Commander which appears to have 1 XLR input and output. The description says these are unbalanced though.
One other thing, what interconnects are you using? Are they shielded? You might want to try different ones and see if you still have the problem. I would also recommend that you talk to Dan Wright as he may have suggestions. Good Luck!
One other thing, what interconnects are you using? Are they shielded? You might want to try different ones and see if you still have the problem. I would also recommend that you talk to Dan Wright as he may have suggestions. Good Luck!