Crossover ?

Can you use two differnt crossovers in one speaker? A forth order for the high pass and a third order fotr the low pass. The forth order has a L pad and an impedance eq. The third order has just the impedance eq. This was the olny way so far that I can keep the phase for the speakers very close.

You can use mixed order slopes. Often they work better than using the same order slopes on both the tweeter and woofer. More common than you think.