Summary: I love these headphones, and for 80$ on Amazon I don't see why someone wouldn't want these. They are great sounding, and the folding design is great. They fit very tight, so it can become a bit uncomfortable at times. But the great design (and look) of these definatly make up for this!
Summary: K518 is no doubt a legend - killer sound and decent isolation for a portable cans, together with the most badass clamping force ever.
K67 is one full class above in sound, and maybe two in comfort. Funny though, the K618/619 siblings exerts a MUCH stronger clamping force on the skull than the K67, despite the seemingly similar design.
Bass: As deep as you can hear, and as deep as you can feel as well.
Pros: VERY deep bass, much improved comfort over K518, clear sparkly but not harsh highs, lush and moderately detailed mids with good definition
Cons: Still a bit uncomfortable for the long haul, Soundstage compressed at times
Although these headphones look and sound great, the build quality isn't too good
13 February 2015
Summary: Although these headphones look and sound great, the build quality isn't too good. The headband will come apart after 10 months due to something snapping inside. I would still recommend these however and after all they are by Tiesto, a massive legendary name in music.
Summary: Have had these headphones now for 6months. Don't know much about the technology behind them but i love the way they sound, nice and punchy but very clean at the same time. They hug your head nicely which somewhat isolates you from other noise. The pads covering your ears are thick and soft enough that I can wear them throughout the day without feeling uncomfortable and double up as super warm earmuffs in the winter! The wire is INCREDIBLY durable.
Summary: I got these headphones yesterday and used them today. I must say it has the right level of bass with the rest of the sound. It definitely has everything I was looking for in a pair of headphones.
Summary: Well balanced, maybe a tiny bit bass heavy but they are mainly DJing headphones but overall sonically very good mixing headphones and very comfortable. Bought these after a friend had them and my old ones got broken. Durable construction as well, like that you can fold them flat.