And my friend's unit arrived, so I can speak from a direct comparison against my beloved hd600. Yes, I am impressed by the sense of space the hp can produce. yes, the highs are very articulated. They just dominate to much on these dry vocals. It's pleasing at lower volume, fatiguing at normal listening levels (for me). after 2 hours I needed a pause. It's very "HI-FI" and extended, very holographic. exciting for sure. The mid are more on the dt880 side, but colder. It's not a bad thing because the distance of the voices is equal on both female and male voices. But dear friends, you must admit that their highs are not in the mid fi league, and a well burnt hd598 is better on every aspect but the bass extension. Who say that the hd600 has a peak on the 5khz would have real pain listening that unique jump of 6 db where every other hp have a dip... every time a cymbal hits, the voice disappear, so happy k712 to everyone.