Those who own/know well the CK10 please help me here. I just bought a pair of these today. As such I didn't still have the time to make a thorough evaluation but their clarity and definition exactly corresponds to what I was expecting,
However, I noticed that the CK10 can easily start distorting when volume goes high. By high I mean over 3/4 when out of an iphone, ipod classic or when amped through a headsix. Without getting into discussing how high I am listening, the fact is that no other iem that I own (eg. se530, fx500, ie8, ah-c551) has any audible distortion at these volume levels. Distortion can get so large that it seems that the headphones completely saturate and get clogged.
Can you advise? Is it normal with these iem or should I return them?
What bit-rate are you using? If you are compressing your music, try ripping a good-sounding CD into Apple Lossless and see if you hear a difference. Also make sure your EQ is turned off, that can add distortion as well.