I drive a lincoln LS, and the rear seats hold back alot of bass. Rather than constantly putting down seats and firing box into cabin (2.5 @ 30hz). I attempted to do a bandpass through the rear deck but it was either the design or execution, but it definately wasn't right. Is there any magic numbers that work with 10s in a bandpass enclosure? I would like to use slot style ports if i could, rather than round flares ( thats what i did last time ). Any suggestions would be apprectiated!