I've just finished making a balanced Y-Split to use both headphones at same time. It makes me avoid having to fiddle behind the headphone stands when I want to swap, and should be useful when I invite friends over. ;)
I've used different color XLR connectors for the two inputs, that match with the headphones' cables' connectors. That way, even if I find myself using 2 cables that look alike, I can still tell them apart in an instant. I've used all black for the HE-6 and silver/black for the HD800.
The wire is Toxic Cables silver/gold, but I think I will make another with copper for one half and silver/gold for the other once I decide which one I prefer with which.
Edited by Benjamin6264 - 3/2/13 at 12:01pm