Jwc2012: Well, I sorted out the short. It seems the unbalanced main outputs on my preamp have failed. The wires are fine. Fortunately, my preamp has three sets of unbalanced main outputs, so I switched to a different set. Everything works fine, although I am a bit upset that this will be an issue if I ever sell the preamp. I'd either have to have it repaired or take a much lower price. Most of all, I thought I was buying a bullet-proof preamp, but the first one I bought had the same issue out of the box. I exchanged it, and 2.5 years later, I have the same issue with the second unit. I suppose the weight of the long RCA cables might have pulled something loose in the preamp, but that should not have happened. In any case, I now have the cables dressed in a way that does not stress the output jacks.
But I am back to basking in glorious Ohm Walsh sound!
But I am back to basking in glorious Ohm Walsh sound!