Crossovers

Good attitude sheridanmartinj 

I used this one.  223xs | dbx Professional Audio

I thank everyone for there input; that`s what I like about this forum there my be difference of opinions some good some not so good; grudges and personality clashes but you can get what you need to move forward.

STL will build you a wonderful big valve crossover just for your current speaker or ANY you decide to go to..

I use a simple Behringer 2496 for bass management and First Watt for the monitor section. B4 or 5 depends on application once again. A step baffle is in one and it is adjustable..

One up is STL, 2, 3 and 4 way big valve active crossovers.. GOOD parts.
or they have a sub tube active XO too, again with a step baffle if you want..

Regards

+1 for Marchand. You might be able to hear the difference between a low cost crossover, but I personally cannot. DBX has always made good stuff. Once you bi or tri-amp, you will likely not go back to a passive crossover. Been multi-amping for 40+ years. 

Don't laugh but I use a DBX crossover and I can't hear any issues with it. It's cheap because it's mass produced but it's pro level stuff. 

They were around $900 when sold new (limited numbers) but the Pass First Watt B4 active xover would be way better than the Marchand, discrete solid state, steeper slopes and very versatile, just have to wait for one to come up used.
https://www.firstwatt.com/pdf/prod_b4_man.pdf

Pics https://www.audiocircle.com/index.php?topic=161065.0

Cheers George