Some quick impressions, busy pre-holiday season (and too much stuff incoming, mostly the fault of the Deals Discussion Thread, to be able to spend what little listining time I have right now in detailed analysis...maybe on the holiday and coming weekend do some more).
1)nicest case I've gotten for an AT headphone in a while, mostly these awful bags with the string to tighten them, cinch bags...I hate those.
2)haven't yet gotten the fit on these I'd like, but that is a common problem I have with headphones with an external chamber and shallow fit.
3)no slider to tighten the headphones...no excuse for this except when there is a mike (these didn't have a mike), which leads to
4)very microphonic...won't work on walks, exercise, need to be in a quite state to be able to enjoy, microphonics make me batty.
I compared the sound to my IM70, which I'd say are of similar sound quality, though the sound is quite different. IM70 is richer sounding, has more bass and more "presence" than the ckr-9's. The ckr-9, howerver, has tighter, more focused bass, and, while less in quantity, is enough to drive the music, and the sharper edges and better definition make for a nice sense of drive. The mids and overall presentation of the ckr-9 is "cleaner", more sense of openness, less richness of timber than the IM70, though I'd say it's a toss up which one is "better"...more different flavors (to get a sense of what I'm describing, it is a bit like comparing the Ety ER-4 "just the facts m'am" presentation, and the JVC-850 woodie richness, though not quite that extreme).
Since many of my current mid tier iem's seem to be AWOL (they are in big trouble when I find them), I compared, for no good reason as it is not a fair comparison, to the Phonak Audeo 232, for no other reason than I just got them. It is definitely not a fair fight-the discontinued 232's listed for about $600, and are considered top tier. Sure enough, when I changed to the 232, a certain amount of grain became obvious to me on the ckr-9 that I hadn't noticed before. Still, not doing suicidal comparisons, I did find them enjoyable to listen to, with the caveats noted above.
Thanks Vlenbo for putting me on the tour, had fun, see if I can post some more at the end of the week.