headphones worthy of the name

The first headset I have used for years (end of the seventies decade) was already a Sennheiser at the time there were not many brand. The trademark of this company is simple: a flat response, as faithful as possible and not necessarily flattering given the current criteria for sound reproduction where basically it's the bass that are put forward.
But it is very easy to get the "big" sound with this shortcut, but is it the "right" sound? I doubt it, especially when you see the price of some brands that hurt my ears after a few seconds, and when you know that the most difficult to reproduce, it is the media.
On a Sennheiser (especially this model), this frequency range seems to have been the subject of special care, the overall dynamics are excellent and restitution for all types of music, relatively accurate.
While the design is not the most attractive (even one), but at least put much more expensive, I do not see a lot of competition for this type of product equivalent price.
The connector also works perfectly.