if so what the hell are they made out of? and why do they sound so much better than reagular boxes. i have a box im tryin to finish off and i hear that you can put dynomat in it to make it sound better or coat it with polyurathane cause its pourus---(spelling). well yeah i dont want to spend like 300 dollars on the VT box when i can do the same thing for alot less $$$. anyone???