The CK10 is an amazing sounding IEM once you get a good fit that touches the ear's 2nd bend. Problem is it's design, based on that it seems that a shallow insertion is all you need. The nozzle is too short and a bit too thick, so you have to make up for that. I get decent results with Shure Olives that are inserted only slightly on the nozzle to maintain a good length, but Ety triflanges will also be a good match. When you don't do these things, you get that metallic timbre some users complain about as the bass looses a lot of rumble and emphasis and a 7-10k spike takes it's toll.
Bass rumble and extension is very surprising.
Treble is slightly boosted but not that offensive. Siblilants aren't masked but are somehow not that sharp despite their presence. EX1000's sibilant's are slightly sharper in comparison. Imaging is probably the best I've ever heard and it's now fully appreciated with a good fit, an astounding soundstage realism with binaural recordings.
Edited by Inks - 4/10/12 at 11:28am
