Saw you post it's a cross of the lcd-2 and d7ks. May you specify what it means. And apparently, my local store Jaben, received a demo set for the store owners and workers to audition if they wish to bring it in and the people at my local store say it was disappointing. I was utterly confused when compared to the great responses from headfi! Have to check my sources then.
I found the bass on the d7k while awesome was a bit flabby, especially having the lcd-2 recently. The bass on the th-600 has barely any flab like an lcd-2 but a lil more than the lcd-2 to give it that d7k fun sound. The mids are fast and smooth, quite a bit faster and smoother than the d7k but still not as fast and smooth as the lcd-2. The treble is quite dif. from the lcd-2 and while I enjoy the lcd-2's treble you can tell it's rolled off a bit where the th-600 is not and it doesn't add any harshness. Out of a decent amount of 1k headphones I only liked the he-500 better in the treble.