jsmiller58
Headphoneus Supremus
I think, but could have dismembered it , that the Senn connection approach requires no mods to the cups, while the 3.5mm connectors require modding the cups... It could have been as simple as deciding based on the path of least resistance / lowest manufacturing cost. But I might have gotten that wrong.At least they chose an industry standard connector and didn't do something super proprietary. Also, if you want 2.5mm you can always get the EMU Teak.
Decisions, decisions... keep my th-x00 as is (hate the cable, really, someone should be taken out back to the woodshed for that monstrosity), pay to have them modded, or sell them and buy the new ones...