Description of new pads from someone on Reddit that seems pretty accurate. He is better at describing changes than I am able to do.
Lows
All of that planar texture is still there in every range that I can remember. The lower bass extension seems the same, but more noticeable and the "hit" seems quite a bit more prominent. I definitely like the change in the low end as I listen to a ton of electronic music and it seems to synergize well with this.
Mids
Mid range seems about the same for all practical purposes. I think initially I felt that the headphones lost a little something in the mid range, but I think it was actually just offset with a little bit more bass kick and the effect that the pads have had on the treble.
Highs
Up top there is a little more brightness (I think) and the high freq seem more distinct. I don't think I would consider this hot, but there is definitely something a little different going on. Again, I think I like the change, makes the music I've been listening too seem more fun. After two 4-5 hour sessions this week I did not find anything fatiguing about the sound, I'd be good for a 12 hour sessions at the PC no problem.