I read once somewhere (probably on this site) that Elemental Designs work real well in small enclosure, well 2 of my friends asked me what are some good subs that work in small places, one has a 99 Ram Single Cab, and the other has a F150 Single Cab, I was thinking Elemental Designs for them because I'm starting to sell car audio and wiring up stuff for my friends. Is it better to go off the suggested box size for Ed or go different sizes than suggested?