Here's the deal.....
I am doing a re-vamp on a smaller system in a youth room at a church. The system consists of a mackie 16-04, and a couple early model Jbl Eons. The snake is 150' long and runs under a suspended concrete floor, and as far as I know does not come in contact with any utilities along the way. It terminates at a 24 channel patch bay behind the stage. The stage has four floor boxes that each have eight sends to the patch bay. We have not been able to use the boxes, because doing so results in terrible radio on almost all channels. I found some wiring inconsistensies in the snake ends and the boxes, so I re-wired everthing to the standard (sheild on pin one). It helped some, but I still can't use the boxes. If I plug an xlr straight into the patch bay, some of the channels have radio and some don't. I have another snake that I have been using as a temp that doesn't create the radio problem, but It doesn't alow me to use the floor boxes. The problem is BAD, and I have exhausted my limited knowledge of how to rid a system of RFI. Please HELP!