Dobrescu George
Reviewer: AudiophileHeaven
There have been LOADS of multi-channel and quadraphonic headphones from many brands, AKG, Sansui, Technics, Koss, Elega, Hitachi, Heru, Marants, Pioneer, Sennheiser, Toshiba, Universum etc
More recently gaming headsets have been implementing 5.1 and pseudo 7.1 headsets.
I would rather not... hd800 still beats all of them in all departments, or at least from what i tested... so... maybe more than one driver in a headphone does not make sense if you do not include a very good crossover? or maybe it is simpler to do everything using only one driver?... i will study further.