Pros: Planar magnetic, well balanced, accurate.
Cons: Need amped, headband uncomfortable.
The T40rp mark 2 is a very fine headphone. My first impression's of them where positive although your ears might take a while to get use to the very unique sound signature. They are very well balanced, with no tendency toward a particular frequency but the bass is particularly well refined.They are lacking in sub - bass.This absence in sub - bass is why i cannot give them 5 stars combined with comfort issues regarding the headband. Lastly, they are much quieter than most other headphones i've tried...more than likely due to them being planar magnetic, but they additionally only have a sensitivity rating of 97db/mW, so quieter still...
I recommend the T40rp mark 2 if you work in a recording studio, that is what they where designed for. If you like to listen to music leisurely at home, then be aware that you may find them bland, flat sounding and soulless!
But they are still a very, very fine headphone.
( After an hour of use i measured bass response on my computer, they measured as low as 20hz, as advertised. After 4 month's of use now this has got lower! they now register as low as 18hz. Not quite low enough for me to rate them 5 stars though).