We recently installed 12 Shure SLX lav sets. I put six receivers in each of two custom cabinets with rack rails. Each cabinet has a heavy steel back with 12 antennas spaced out. These are connected by short supplied coax cables to the receivers. Each cabinet is placed in a wing, right up of the proscenium wall. No part of the stage is more than 50 or 60 feet from the receiver. I am getting drop-outs. I can see the carrier signal reception going in and out. We are using the automatic frequency programming procedure. I trust that the built-in program is not making poor frequency choices, but I don't know. I realize that I cheaped out with the antenna approach. If central antennas and distribution amps will make all the difference, I can start lobbying for those. What I can't do is spend thousands on top of thousands already spent and end up with the same problem. Ideas?