The mids are definitely recessed a bit, but I think they make up for it with the far, FAR better bass and the much bigger soundstage.
I have been researching the HD700, thinking that it might sonically fill-in the missing mid-section of the T90, (that I've just recently bought) while at the same time, hoping that that the HD700 would be an overall improvement to the AKG K701-2. (When I bought the T90 about two months ago, I was hoping for an across-the-board improvement for the K701 and K702). The T90 does give you a more satisfying and more impactful bass presentation, but coming from the AKG phones mentioned above, and then listening to the T90, it's apparent "what's missing" in the T90's. (Subtle details in the mids and upper midrange section that you can hear in a 701 or 702 simply aren't there in the T90). Or, if they are, you have to concentrate and focus to hear them. During the past couple of months, when listening to the T90's with some music that I'm very familiar with, I've often thought "If I were listening to this tune for the first time with only these headphones, I probably would've missed this detail or that detail, If you didn't already know that certain sound elements were there, you would've probably completely missed them"
Once I started researching the 700 here in this thread, I was beginning to think that the 700 would check all the boxes. Now, after reading some impressions from others giving their reports of a recessed midrange, I'm not so sure.
I listen mainly to small ensembles with acoustic instruments. (Acoustic trio jazz, small group indie folk/pop). So, if there is a midrange recession in the 700, I'll probably hear it, (or,
not hear it, as the case may be
), as the midrange is where a lot of the musical details that I like to focus on sits, in the sound spectrum. Even though the bass extension and bass presence and low-note texture of the T90 is enjoyable, (this is what's missing with the 701's or 702's), what takes away from enjoying this aspect is knowing what you're missing in the mids.
Someone just above this post said something like "...there's definitely a tradeoff taking place (talking about the recessed mids of the 700), but the bass is livelier and the highs sound fuller..." Well, that's about what I have now, with the T90. I was hoping that the 700 would fill-in the missing gaps of the T90 (while still retaining most of the low-end extension, and keeping the high-frequency extension, but at the same time "filling-in" the middle). Now I'm thinking the 700 would simply be more of a side-grade (with probably a slightly different sound signature, overall) to the T90.