ok im trying to design a box that will house 2 12 RE mts. this is going to be my one and only box used for daily and comps. im going to put in multiple ports that will be pluged and with the press of a button will open or close to allow me to tune it however i want when i want without leaving the car. the only real problem. im having right now is that i have a ton of space available. i got my back seats out. i do not want to wall it. so around how big should the box be. i estimated that i have around 20^3ft to work with but im sure that this will be to much for 2 12s. so whats everyones opinion.