It has good extension, and can be noticed on the detail retrieval. More or less neutral sound, and may get a bit dry for those looking for more liquidy sound sig. Not for people into laid-back sound sig either, but technically, it's really good iem. The mid treble reminds me of SE826(a bit on the thicker side), and the forwardness similar to the HD800(this is why I said earlier it would fit for those like the HD800 without such high 6k peak).
Ran into Ken's graph. The peak just bellow the 10k explains the forwardness, and the high tonality on the tinny side(HD800 sounding), but the mids are quite well done. I wonder if he got some really good BA drivers as they sounds quality, really tight.
To me, they have overall signature to NT6 I've had before(so close to what I prefer), but the mid treble like I've said a bit on the thicker side, and a bit more forward. I recall NT6 having more of a sound difinition, and UERM sounded less depth when switched over. Sound stage sounds correct(doesn't seems skewed or anything, rather large for a universal as UERM is narrower).
Very technically proficient sounding to my ears.