To ClieOS:   You were spot on with your description of the Meelec CC51. My ears hear the same. I just got them yesterday and will put them through burn-in now. Thanks for a very accurate, concise review. 

Quote: Thanks for the info.

Yep, 18k and I'm over 40.

The initial review is very accurate!   Unfortunately, I had to return my MC3 (MC5 with a mic) after 2 days. I was missing the bass and high-end. I wonder why they cut off at 15k? Is Etymotic assuming that we don't hear above 15k?    The MC3 are not bad at all, but I'm looking for a IEM...