Hmm so the Pro 82 are very sensitive to seal as well, bass seems to be gone while using glasses, which I do, I am currently using the HyperX Cloud (Takstar Pro 80) and the bass seems to be fine even with glasses...
I wonder if having higher clamping force which the 1990's have, makes it so you don't lose bass with glasses, or is it just cuz they are open back?
The reason I wanna get a new pair of closed cans is that my HyperX Cloud's developed a driver rattle in the right earcup and also the pads are dying on me.
When wearing glasses the amount of drop-off depends on a number of things.
Thicker arms, thin arms. Whether or not thin arms rest against or slightly in the skin where the pads touch the skin or if the arms are well above the skin where the pads meet the skin.
It also depends on how stiff the pads are.
With closed headphones the effect is much worse than with most open headphones as well.
Just press the headphones a bit more and if the bass amount changes substantially you have leakage.
Or listen with and without glasses with bass heavy music.
I do some standard tests using actual glasses on the test rig which has some rubber foam on it similar to skin. The glasses always rest on top of the skin. I don't think (aside from Rtings) that many test for this.
Testing EdXX and alikes is difficult because these large pads follow head contours (as they should be) so have to ensure a good seal when measuring on a flat rig.