Patrick, I don't know if this will help but I thought I'd share it with you. When I got my Io Signature, it sounded GREAT as well, but I had a BAD problem with it picking up a classical radio station and it was LOUD! I tried changing phono cables (supposed better shielding) different grounding patterns, different power cords, locating the power supply even farther away all to no avail. THEN, one day the power cord on my SME turntable motor controller accidentally come unplugged and the sound stopped completely. I tried a different PC on the motor controller and the sound lessened a bit but was still there. THEN, I plugged the motor controller into an Audio Magic Matrix power conditioner and the sound stopped dead in its tracks.
So, now that I knew the RFI was entering there, I have since then bought a Versa Labs IEC Wood Block for $50.00 and it too stops the sound dead.
Maybe a passive power conditioner such as these may help you.
Frank
So, now that I knew the RFI was entering there, I have since then bought a Versa Labs IEC Wood Block for $50.00 and it too stops the sound dead.
Maybe a passive power conditioner such as these may help you.
Frank