F200A as wide range / XO Question

[LageB]

In Fostex datasheet for the F200A, it mentiones, in japanese language, about three BR alternatives to use the F200A. One alternative is Fullrange - no tweeter. Then two different XO-alternatives using the T90A supertweeter. (In my case, I have the FT96H instead of T90A.)

Anyway, Fostex is recommending two XO alternatives for the F200A+T90A combo, both using attenuator R80B. One XO suggestion, is to use only 1.5 uf cap for the Suppertweeter, followed by Attenuator.

Then, Fostex continues to write (something like this) that: A better XO suggestion for the F200A, is to apply Inductor (0.18mH) in serie with F200A which will give "more flat response and more clear sound".

I have never seen anybody adopting low pass on the F200A. Does anyone of you have any comment on that alternative idea (to use 0.18mH inductor with F200A)?

I understand 0.18mH mean High Cut aro 7000Hz. Isn't that little bit low for F200A?
LageB