The velodyne series subs all have a active or passive crossover built in. Which is the better way to run them. I was told to turn off the crossover and let the dvd player and the receiver controll the management of the base. Any pros or cons ?

Denon 3802 receiver
Denon DvD 1600 progressive scan
CS240i center
RT1000 fronts
RT28i surrounds
FX300i Rear back surrounds
Velodyne CHT 10 sub
Velodyne CHT 12 sub
Mitsibishi 27" tele
Monster cables/ 10 ga speaker wire