Quote Originally Posted by Coendert2011 View Post
Nice! So this is inclusiding the hi pas isn't it? You removed the bump with a low q notch filter?

Aligning is next on the list, need to find an appropriate method.

Coen

No notch filter, just 12db/oct highpass + attenuation & hf compensation.

The easiest method would be to take off rear cover from the driver, slightly loose the screws that hold diaphragm (so much that it still sits firm, but that you can also move it by gentle tap with some heavier tool eg. screwdriver handle) attach 200-500hz sine tone signal to the driver and listen the tone. By gently taping the side of the diaphragm you'll be able to move and align or misalign it and you will hear the tone changes from clear/soft when aligned to sharp/dirty when misaligned. You can control it via ARTA spl function - just watch for the lowest amount of harmonics. When you find the best position slowly tighten the screws paying attention not to disturb aligment (by listening or measureing while tightening).
Driver doesn't have to be loaded to do it - so you can do it on the table.