This is my second question; as i was in another forum and want to post all my unanswered questions here. The question is my sister has a 10" Sony Xplod subwoofer that is to go into her car. But is is recommended for sealed enclosures only. Why? Can't it be run in a ported enclosure for more bass? How loud will it be in a .7 cubic ft enclosure, sealed, at 180 watts? And just to satisfy the science part of my brain, why (if it won't) won't it work in a ported enclosure properly? Thanks for all your help.