I have received my headphones today and these are my first impressions: at first I was a bit disappointed finding only one backup earpad, was expecting one pair. The real issue with the pads, especially the backup one is that they are very porly made- they are corrugated and the backup pad is unusable while with the pads on the headphones they are usable but still very poorly made. There is also lots of glue on the headband. And I'm not exaggerating when I say lots of it. Overall the headphone structure is very solid which I like a lot (HD800 are so fragile when you hold them in your hands).
I'm not sure why everyone said these are very hard to drive. harder than HD800 yes but not nearly hard enough for a speaker amp. Cannot go over 10o clock on the Auditor which has very low power output. I have recently bought a speaker amp just for these which I now regret because I now have no need for it. But since I have made a cable adapter to use HE-4 with this speaker amp I connected the two components. Listening at 7o' clock and would go lower if there was no channel imbalance at the lowest level (Azur 350A).
I like the sound, don't find them too bright since I'm coming from HD800, bassy, not much mids but you can't have it all can you. hehe
The weight is perfect, they are comfortable enough, should be even more soon when the pads adapt to shape of my head. The headband setting on default which is on minimum is just perfect. The pressure the headband and the pads make is quite strong at the moment but I think this too should loosen a bit with time. I am however bothered by the long connectors a bit because they touch my shoulder if I move left or right.
While I was writting this I reduced the volume even more because they were too loud, I can't believe people said these need a powerful amp. I'm going to try them with the HM 602 tomorrow.
Peter