Quote Originally Posted by Panomaniac View Post
I think that Vuki's passive is worth a try. It sims well. Nice spread frequency with a dip in the middle and a rise for the top end of the horn. Looks like a ~2.5K notch.

I might replace the 4R7 and 27R with an L-PAD just for fine tuning. It's doing about ewhat my active crossover was.
Depending on one's listening preferences, room acoustics and system, varying (3R3 - 6R8) the value of 4R7 resistor would give wide enough range for tuning high freq. energy. There is no need to change 27R.

One cannot tune low/midrange with L-pad. It is done with series inductor value. Varying capacitor parallel to woofer would change only the upper part of woofers frequency response.