I think your trouble is that you are trying to carry a single-ended source through a balanced cable. What you need is a single-ended cable that is terminated in XLR on the preamp end. You are right, of course, to be careful about which pin is hot with such a cable. Try calling the Cable Co. I used to have a single-ended preamp that used XLR connections, and I had Straight Wire and Cardas make cables that are RCA on the source end and XLR on the other. No problem. I also wonder about your pre-to-power connection. If your preamp puts out balanced and your amp's inputs are single, you may have the same problem in reverse.
4 responses Add your response