I would speak with Albert (VSA),and ask if the crossover is straight-forward or using delays.If you cascade the out-board crossover with those on the interior,you will change the slopes drasticly.If using the OB crossover,the crossovers internally should be removed.
The dual amp situation would seem easier to implement,but might require two crossovers to narrow the bandwidth to each amp.This would need to be done outside the frequrncies handled by the crossover.This will limit the bandwidth the amplifier sees and not interact with the ones' inside the speaker.
The dual amp situation would seem easier to implement,but might require two crossovers to narrow the bandwidth to each amp.This would need to be done outside the frequrncies handled by the crossover.This will limit the bandwidth the amplifier sees and not interact with the ones' inside the speaker.