So what's the verdict on bass traps in a HT? Will I really hear a difference? Seems easy enough to build them myself. And relatively cheap. Anyone installed them and can truly say movies sound a lot better?

About 50% of my walls in my HT have no insulation behind walls (previous owner built and i'm lazy to do anything about it). Low frequency sounds from movies DO sometimes rattle stuff behind walls or the walls themselves. \:\)

Thoughts?

(I need to link to my HT pics/specs in my sig. But I have a pair of M60s, VP150, a semi decent sub and various other speakers for a 7.1 setup)