The measurements and subjective results by no less than three humans agree that out of box tuning of this headphone is horrible. This doesn't jive with any review I read on the 598 or 598 SE. I tend to think that there is more to this SE version than just color back. Anyway, I am not going to generalize the response to all 598 SEs. The walk-away point though is that objective measurements proved their worth strongly in confirming subjective listening tests and showing the path to equalization.
Amir, the problem here is that the HD598 (SE or otherwise, the differences are just in colour) comes with, and were tuned with,
velour pads.
It's no longer "out of the box tuning" once the pads have been changed, especially a change as radical as going from velour to p/leather.
Not saying that the measurements published here are useless, but it's also safe to say that the
vast majority of existing 598(SE) owners would not be able to use any EQ profiles derived from this data, nor would it be particularly useful for any
potential buyers of the 598(SE) since again, the pads aren't stock. It's really the very small subset of 598(SE) owners with your specific set of p/leather replacement pads who would be able to make use of this data, though the bigger issue is that you may be misleading some users into thinking that you've measured a stock pair of 598s.