We'll have to agree to disagree. The AD900x is a much much better headphone than the K550 in every aspect, bass, treble, mids, soundstage, speed etc. For me, K550 does nothing better than AD900x other than isolation and build strength, which is what I bought it for. But I stand by my assessment of owning K550 and K712, if person I was giving suggesting to enjoys the K550 sound, I'd sooner reach for AD900x than K7xx. K550 is a much brighter, forward headphone than the K712, which likely has a similar signature sound as K702-AE.
Even vs K712 depending on my mood, the AD900x is preferable. The bass has more impact and volume than K712 and the vocals and mids are more luscious. K712 to me has recessed mids and tamed treble now, so for long term comfort listening, K712 wins, and I don't always want all that music charging at me like it does with AD900x.
I expect the AD2000x to exceed the AD900x in nearly all aspects. So your opinion doesn't jive with me at all. Can't expect AT to please all, but you find haters for every brand.
I'm listening to James Holden's Balance 005 for those groovy beats, AD900x rocks both K550 and K712.
Edited by SSandDigital - 6/25/14 at 8:30pm