Happy owner of a CKR10 here. Out of the box the bass seemed to overpower the mids and I thought I was gonna have a hard time with them. After about 20 hours burn-in it has smoothened out and the mids have come out to play.
Now I reckon the bass goes deep and punches well. Some say it's too warm but I think it's ok as long as it doesn't muddy up the mids. The mids are something. Good timbre, natural, not recessed at all. Vocals are amazing with them. Details are amazing too for a warm earphone. The treble is detailed and extends well, just lacks a bit of sparkle for me. This way it's non-fatiguing at least. Soundstage is all right with good separation.
Full disclosure: I sold my IM03 after getting this. IM03 does everything well technically but the CKR10 packs more punch in the bass and detail in the mids for me. I thought I was going to like multiple BAs but these dual dynamics really wowed me in the end.
I got a good deal for the CKR10s that's why I bought them, but now I'm wondering if I should get the CKR9s as well. Are they brighter and more detailed? How do they handle vocals?
Thanks in advance to anyone who can answer.