The thing is you don't use Auratones/clones because you want great fidelity, they are used to give you an idea of what it's going to sound like on some very ordinary, not particularly good speakers. So "much needed frequency response" isn't a too big issue here.
I can understand that as well as getting rid of the crossover area of a 2way monitor!
I saw your Auraclones and they look fantastic! Which drivers did you use?
The original Auratone had a very steep/tight time domain response (~20ms).
Shouldnt that be accounted as well?
Or is it that with most drivers frequency transients across the 100-10000Hz, die out fast?
Cheers
Costas