passive vs. electronic passover

I agree with Bob Reynolds.When adding a subwoofer system,it is easy enough to position the them for phasing.Removing passives in an already full-range speaker system is another thing all together.The problem being that a passive crossover can adjust for timimg/phase.Taking these out and using an out-board unit usually won't compensate for the phasing.In order to get active units with a delay function can be an expensive proposition.
The best crossovers I have used were passive/capacitor based on top and active in the bass,similar to the Dahlquist and ARC units.JMHO.

The modified Behringer Ultra curve, that was available on Agon might be interesting.