Not much to says here, it's not a bad headphone, but it's not up to what I was used to.
 
Unfortunately, my 3 years-old daughter killed my Audio-Technica ATH-A900. I hesitated a lot between going to a higher end AT, going DT770, or going AKG.
 
I Chose AKG, and it's not in par with my expectation, Ath-a900 beats it in every way in my humble opinion.
 
Sound is dark and oppressing. Electronica has got good beats, but it's not joyful enough.
 
Tonal balance isn't that bad, maybe a slight bump in 60-80hz to hide lack of lower end bass
 
I often read that ATH-A900 got recessed mids, I prefer to say that they are not proeminent
But I swear K272hd are even more recessed, and very "Forward in the head" kind
 
Soundstage sounds weird, good left/right, but it lacks the depth of ath.
 
Not comfy enough ! First days were painful because of high pressure done by cups. Enough pressure to run with it without loosing it... It better suits my daughter.
 
Higher impedance makes it slightly harder to drive by PMP & phone, but it's still doable.
 
All in All, I'll keep this headphone, mainly for my family (this one has less breakable parts than Audio-Technica). but I'll gonna upgrade soon to an Ath-w1000w