Hi Eric,
I do have a box w/clip. The 5 pin XLR attaches at the bottom, then is wired to a F-XLR and F -1/4" TRS connector(s). The 5 pin XLR cable breaks out to M-XLR and M-1/4" TRS, which connects to the 702t. It looks very much like the PSC duplex box/cable, but I used XLR connectors instead of the multi-pin screw on connectors they use. Right now I'm only using 30' of cable, so not much of a run, but it seems like there's too much resistance in the cable?? I connected my ipod to the cable/box and I can hear the volume change, but I also get some aliasing, like it's a very low quality mp3, very strange...??
My initial thoughts were (when I was making the cable/box) to drop the shield/ground of the headphones, because it's an unbalanced signal and wasn't needed, but I'm not sure what's going on? I wasn't sure if they (PSC or the like) used a resistor and/or cap in the box's wiring? I have seen them with a volume control built in, but wanted to keep it simple.
Thanks again for your help.
J