I've started exploring the Reference 4 plugin, and have stumbled upon the fact that if I choose "AKG K712" as "Calibration profile", and then choose "Studio headphones with Austrian heritage" as the simulation preset, or in the same way choose "Sennheiser HD650" as the source, and "German studio headphone" for the simulation, the resulting correction curves are not flat.
I'm assuming that "Studio headphones with Austrian heritage [...] The series number [...] 712" is AKG K712, and similarly, "German studio headphone [...] model nr.650" is HD650. Thus, no correction should be needed.
So obviously, the source and target profiles for these headphones are not the same. Is that intentional, or am I dealing with some inconsistency in your package?
Attaching pictures for your convenience.