jbl 2426 passive equalization

Hello everybody,
i have just found this excellent forum,
i hope that somebody may help, as i have a problem with my passive networks!
actually i have 2426h drivers, mounted on 2391 horns(with lens) for the mid frequencies, and a jbl E110 8ohm for low medium
i have a 2405h as super tweeter...
the extreme low frequencies are dirved bi amped with 2 15" woofers...
all of this is installed in an original Jbl 4350 cabinet...
my main worrie is that the crossovers i make never sounds good!
actually i always have the same probvlem with the 2426, it has an annoynig resonnance around 2.5k to 3khz...
i used a new 18db octave filter with a compensation for the top octave (with 43micro farad capacitor) but nothing works!
i still have an irritating sound...i really can't manage to make those 2426 to sound correct...
please could anybody help me find a way to equalize them ? is that a common problem with the 2426h??
thanks !
Vince

Welcome Vince!

Your Driver was used in the 4430 and 4435.
Despite there was a complete different combination you can try the HF Part of the Xovers.
Maybe you suceed with some tweaking.

4430
http://www.jblproservice.com/pdf/Net...%20Network.pdf

4435
http://www.jblproservice.com/pdf/Net...%20Network.pdf

Maybe this can help too. But it is for the 16 Ohm Version of your Driver.

4345
http://www.jblproservice.com/pdf/Net...%20Network.pdf