I've read some things here that confused me, and I checked them out today, finding the source of the confusion.  Sunray makes two sets of Pro Gold headphones:  the 'Originals' and the 'CTX version'.  I have the former.  I've read that you need the CTX version if you want to use them with the Equinox.  (As always, maybe I didn't read the fine print.) When I plug my 'Originals' (via a 1/4" female to 3.5 mm male adapter) into the back side of the control module it's as if they aren't connected