I just bought 2 12 dual 2's. I am paying my next doo neighbor to build a box. He is a cabinet maker by trade, but has no experince in building sub enclosures. I have a 2007 impala that does not have flip and fold rear seat. I have sevral questions. First the specs for the orion box are roughly 3 cubic ft per sub. If I understand correctly I will need to add the port on to that and add around .5 cubic feet for each sub. correct me if I'm wrong so far. There is a cut out in the metal under the rear deck lid and I would like to port the box threw that hole. so My other question is can i make the box 3.5 cubic feet and add the port on the top going outward??? With the subs faceing tawards the rear?
