You don't need an active xover the speakers have bi amping provision. Connect the pre outputs directly to your amps, remove the jumpers from the back of the speakers and connect each set of binding posts to an amp.
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^Well, there might be some benefits.
It might allow for more available power.
Many amps run in Class A up to a point, then work in class AB there after. If one pair of amps are running the demanding woofers, it could allow the other pair to maintain Class A operation longer in the typically more critical to human hearing of midrange/treble.
It might allow the amps to run off separate power outlets, which might be advantageous.
The amps might run cooler, with smaller cabinets that might be sturdier and less prone to vibrations, and easier to move.
It might help keep cable runs tidier.
It might allow for easier upgrading as funds become available.
In the event of an amplifier failure, it might allow continued use of the system during the time that the damaged amp(s) is/are repaired or replaced.
Oh yeah, they system will be more ready, should an external active cross-over become available. :-)