i dont remember the impressions very clearly, but i'll just give the points.
i would say they dont fit the 5K price tag [from google].
the bass is very bright. too much for me, but good for a bass head. also, the higher end of the bass aint that clear.
mids are okayish, warm.
treble is good for some instruments, but subdued for others[thats what it felt like
]
the Klipsch S4 i used had a bit of use when i listened to them, and the i felt the wire and strain relief qualtiy were not as good as the C-12. now, my C-12 has been used continuously for over 4-5 months, and it barely has any signs of wear and tear. i go for jogging, gym, casual listening, keep them in my pockets, but no wear and tear. however, the wire has a bit of memory, and thats a negaitive, but not so serious issue with me.
oh, and i wear it over the ear. sounds better.
hope it helps!