Sound Tools CAT Rack Male - Male XLR Stage Box with Audio Over Shielded CAT Cable. Send 12 Channels of Audio, DMX, Clear-Com or AES.

It does what a passive connector panel should do, but $250 is way too expensive. They can charge this because nobody makes a similar product... yet.

There seems to be no standard for wiring these devices. I use this rack kit with some Lynx products. Ch1 & 4 are "correct" except Ch1 is out of phase. Ch 2 & 3 are "crossed". I had to make an adapter to fix Ch1's phase (by crossing pins 2 & 3 in the XLR connector. The attached photo shows the 3 right angle adapters plugged into channels A1, B1, and C1.

I install this in my rack. I have several Lyx cat xlr boxes. The wiring didn't match. In the first four xlr jacks. Only 2 of the four matched. I determine this with a cable tester. When I say they didn't match I'm talking about pin 1 2 and 3