I was planning on just building a standard SET cable with the SMC connectors at the other end. However, I do already have an XLR cable with speaker taps that I plan on packing. If time permits on Friday evening, I might be able to install a 4-pin Neutrik XLR cable as a temporary solution prior to Saturday's meet.
Edit: I kind of like these "triple threat" cables from Double Helix Cables, which would allow one to run virtually any cable with their HifiMAN headphones.
Ok, cool. I'm not sure I 'd like those connectors swinging around my head on the DH cable.
Gracias, much appreciated.