Sennheiser HD800s is an improved flagship, over ear, open back headphone in a black finish, includes both a 3m cable w/ 1/4" and 3m cable w/XLR terminations and has a slightly tweaked sound vs the HD800, to provide a warmer (fuller) sub bass response and smoother treble response. In this way Sennheiser addressed the two running sonic complaints about the sound of the original HD800.
The 300 ohm headphones work well with a variety of amps we carry, including the RME and the awesome iFi pro. With the smoother sound and less tendency towards a bright sound, the HD800s gives more consistently pleasing results with a wider variety of amps. The HD800s build on the HD800's ability to provide one of, if not the best, open, wide soundstage, giving music a natural, spacious feeling, as well as a very balanced frequency response and enormous amounts of detail.
HD800s have very spacious earcups yet excellent ergonomics, fitting close to the head, little clamping force and a light weight compared to other top of the line models. Tip - Wearing glasses does not effect the sound much at all - there isn't much of a seal, so the earpads can sit on your glasses' arms without changing the sound much.