Just a thought here. Are you following the Arrow markings of the cables? Signal flow From-To. On the Source, preamp side, the cable Shield and Signal Ground wires are connected together.in the rca On the subwoofer side connector, just the Signal wires are connected in the rca. The shield is not connected.
Buzzing IC's
Hi, I have an ARC LS25 mkII preamp and I've tried two different sets of the WBC Mogami 2549 shielded cables from Amazon. I'm using these between the preamp and my KEF KC62 subwoofer. They buzz when installed but when I throw on a pair of unshielded IC's no problems at all. Any idea what could be causing this? Thanks!