I have an odd problem I can't figure out:
We have monitor outputs scattered around our stage. They are fed from AUXs on our Soundcraft MH3, through microphone cable in conduit to an amp rack, then speaker cable through conduit to the output. There are six outputs total, and each conduit holds four single-conductor cables (two outputs).
Here's the issue: I hook up a speaker to one of the outputs, I play a source through the AUX. Sounds fine. I turn that one off Then, I turn up it's partner AUX with no speaker attached. I hear soft, distorted sound out of the first output. The second output won't work at all.
I checked the board by using a pair of powered speakers direct out of the AUXs and that doesn't appear to be the problem. I also swapped out the amp for a brand new RMX850, and that didn't solve anything either. In the process I re-connectorized the speaker cables.
I assume it's some kind of cabling issue, but I can't find any physical damage on the parts of the cable I can see.
Any suggestions?