build a box

if your us to boxes it will take some time for you to get use to the sound that your going to get from your speakers in a wall form... the easiest way to do this is to make a template out of cardboard that will fit your back seat, hole, then draw it out on wood....if this a first time for you it might take a couple of trys... your also going to have to seal off your trunk after you insert the wall ...use "GREATS STUFF" this is expandable foam that come out of a tube... you might want to think about how your going to hold this wall up??? the easiest way it to get 3' brakets with pre-drilled holes in them and self tapping srews so you can just bolt it to the fram of the back seat.... don't for get to run the wire first before you seal it off... good luck