Some tweaks again to the plots. The perspective is closer to orthographic, there's an additional top-down view that extends down to 7 ms, bigger ridges are individually marked for frequency again, and the color scheme was changed a little, though not much.
AKG K 250 modded with a nylon disc in the cup (not a big effect) and another nylon disc in front of the driver (a bigger effect):
Original K 250:
It's a good driver with a few problems. The 4.5 kHz peak is interesting in that its frequency isn't affected by the ear's anatomy - it's asking for some EQ later on.
AKG K 240 DF again, for reference in the new design:
Like the approach a lot! The colour scheme is horrible though...neither the dull green nor the brick red really accentuate the plot. You could maybe try a few different colour combinations of the same plot, and post em here, so everyone can suggest what works best to present these plots.
Edited by jerg - 10/13/12 at 4:14pm