Hey everyone, I just got a quote to have my 2 JL 12" W3s installed with a new box, new wires (cause they won't guarantee using my old ones) and Dynamat for friggen $400! I have no idea if this is high or not, but the Dynamat adds $200. I absolutely refuse to be one of those ghetto vibrators who rolls around bumpin all kinda crazy sound and vibrating so bad you cannot even tell what song they are listening to. I want clean sound and a deep tone from outside, no vibrations!!! Is the dynamat completely necessary or do I perhaps not need to line the whole trunk? Any input? Or should I just do it...I'm actually considering selling my crap and just keepin the "livin loud" or whatever the crap the stuff is they put in here from the factory.