That graph is suspisiously flat.
I thought that is the fashion

Are you sure you are not clipping your mic pre?
Well, it turns out, you are absolutely correct...! I am used to REW which gives a warning, Fuzz Measure doesn't... heh

ttan98, thanks for the vote of confidence but I messed up. jparkhur, these are not calibrated, not sure how to do that yet.
Here's another go, with 30 and 60 degrees also. This is at 20 cm, it's not supposed to be accurate just for a quick eq on the driver. 2 ms window. The bump at 2 kHz is the diffraction peak from the box (10 cm wide):
