Pros: Elegant bass, good mids, ok highs
Cons: Not very detailed, rather small soundstage, not very good instrument separation
CK7 earphone is a nice detailed ear piece with titanium housing which makes it very durable. For me, although i am not using it very often this works the same as it used to be the first day i bought it. They require burn in time at least 100 hours and you can definitely tell the difference in the bass section and the mids.
Comfort: i would recommend to be worn over the ear because the drivers have a bit weight due to the titanium housing. its not bad and you can for sure wear them over the ear with no problems. Comfort wise they are ok I would say
Microphonics: The cable is a rubbery very thin one and you have to be careful not to bread it by accident. Still after so many years still is as flexible as it was from the beginning. It ca easily be placed within the given pouch. Over the ear you dont have any microphonics but sometimes the cord seems to get tangled a little bit while you are on the move. It would be better with a shirt clip if it was provided in the first place
Isolation: Its ok but not something special. The included eartips are one flange, with a big hole inside. but they dont go very deep. Sometimes i find myself to trying to push them harder into my ears but they wont budge. You can get a good seal that is not an issue but because of the a bit shallow fit while walking they will break the seal after a few hours while walking of course. That is also due to the weight.
Sound Quality: Good bass, punchy but not huge bass. Its ok to feel it but no for bassheads or people that would need something more. Its sound signature is a bit cold in the mids and highs. It seems a bit flat, balanced with no sparks at the highs. No sibilance but not something special to make you WOW. it is more on the neutral side of the spectrum. The bass goes deep. I tested it and i could hear up to 30Hz. Not punch though you just hear it. Soundstage is a bit small. Everything seems very close to you. Separation is not very good and the instrument placement are not very well discerned.
Value: I paid around 70$ and for that time the value was very good. It was a good buy and i am still satisfied. Coming from an EP830 at first i was a bit shocked on the difference of the SQ but after the hype i have to say that by past standards was an improvement. Although nowadays with the same amount of money you can definitely buy something better
This is my first review. Hope you enjoyed it. It was a rather late review (i bought CK7 back in 2007) but i felt i had to write my thoughts just as other people are sharing theirs for people like me to find what they are looking for. Cheers :)