just bought a 93 chevy ext cab...I wanna build a box for under my back seat but never seen it done in person for two 12's. I don't wanna sell my subs or buy 10's....has anyone every done a box under the back seat of a chevy or seen pics...I liked ported but I took a look and space is tight so it's prob gonna be sealed...b4 I get exciteded and plan it I just want some opinions. thnx