In other words, there are at least 3 generations of Harman Oratory presets for these cans (see attached files).
Global gain went from -5.0 to -5.5 to -9.3 dB.
What's funny is that the latest generation (v3) has the lowest preference rating of them all. That's weird
v2 had the lowest deviation from Harman (0.18 dB). Which means that v2 + my additional filter should in principle have the lowest deviation from Harman of them all. Oratory tends to limit himself to 10 filters max, to make things easier for most users. But EAPO doesn't have limits, so for all of us who use it...