Thanks Jeremy, I received them today!
As you can see, they are... huge!
The dimensions are approximately: 3,5 cm thickness, 10,5 cm outer diameter and 6 cm inner diameter, versus beyer's DT990 pads: 2,3 cm thickness, 10 cm outer diameter and 6 cm inner diameter. In my hurry and excitement to try them on I forgot to take side-by-side and before/after photos
They feel great too, however I can't really decide yet which I like better on my head, as beyer's stock (velour?) pads are also super comfortable. They even smell great, and after everything I've read about J$'s v1 beyer pads I'm happy to find out that they certainly live up to that hype as well :-)
In terms of sound alterations, these pads are giving exactly what I've been wanting from my DT990/600 ever since I got them. Slightly more bass! As a matter of fact, I'd say these pads are leaning towards "quite a bit" instead of "slightly" when it comes to bass quantity, especially in the deep sub-bass region. Which I personally think is totally awesome. That sub-bass drone that I'm so addicted to is more powerful than I've ever heard, and it does that without sacrificing any of the DT990's crystal clear sound (unlike the DT770pro pads did, what a horrible experiment that was...) But I'm pretty sure there's an entire legion of head-fi'ers out there who wouldn't be able to take this amount of bass for granted.
Oddly enough, I think that despite the bigger size (if that's relevant at all) the overall soundstage and depth has decreased a tiny little bit. Will do some more testing with familiar albums because I might be wrong and it seems quite contradictory if it really were the case.
Edited by RazorJack - 1/11/11 at 10:46am