DT 990 PRO
The DT 990 PRO headphones are a set of over-ears from Beyerdynamic. The DT 990 PPROs are open-backed headphones, which literally means the back of the ear cups arenâ??t totally covered with plastic. Open-back headphones make your playback to sound like you have a set of free-standing speakers right by your head, rather than echoing out at you from an enclosed space.