Well I tried them with the 20 khz high pass and it seems that I just
have that extra "air" what I was looking for.
(Or is it the, positive intimidating, sight of two black tiny horns
on top of the loudspeakers)?
He he.
Well thanks for the advice again, and... Spatsiba!

Well tomorrow I am trying a third order filter I am soldering right
now, I use this site to calculate the L/C values: http://www.the12volt.com/caraudio/crosscalc.asp#ccc