What can I do to improve the bass responce in my basement home theater. I just brought the sub down yesterday to check for rattles before I put up the drywall and it was kind of bla. I do not have the luxury of building a 3 or 6" sub floor. Would laying down 1/2" plywood of some sort help? I don't think that will do it but I am just looking for some thoughts. Tahnk You, Domonic A.