what do you put under your sub?

id like to knwo what if anything do you put under your sub, what kind of sub, and what improvement did you notice? ty

jaf229011-17-2006 11:49pm

hoff48 Details Discussions Posts This discussion Message User 26 posts 11-18-2006 at 12:56am Copy Comment URL Report Comment Edit Delete Air. I have two 18" infinite baffle subs which are ceiling mounted. They are in plane with my mains. Unbelievable.