massive hippo xl 64

[wamba]

hello everyone      I recently bought two massive hippo xl 64's.I have a old 99 gmc c1500 pickup and was thinking of doing a center console box for them , but instead of building the normal ported box, I was thinking of using a passive radiator,or radiators.I don't know if this is a good woofer for this app,I havent checked the woofers qts or t/s specs at all yet.Just thought i would run it by you guys and see what everyone thought.Opinions or pros and cons welcome.Thanks