C5=Le/Re^2

Now the Kappa 15lfa has Le=1.27 mH and Re=5.4 ohms.
so....
C5=1.27/29.16
C5=0.0435 uF

This seems really inconsistant with any of the C5 values listed in your crossover diagram. They are all at least 20 uF.

What am I doign wrong?

Thanks

Adam