I'm almost up and running with 2 sa10's on a sundown saz-1500d @1ohm in my Lincoln. I have a box I built for my Cadillac, that is 2.5 cubes with 40 sq in of port area with a slot port. I'm going to run this for now, down in the well of the trunk. Here's a pic. I want to build a new box that sits on the hump behind the seat. I'm not going to run rear fill or the factory sub. So I will have two 6x9 holes on each side and a sub hole that is 6-8" in the middle. First question is what size aeros to run. Will 2-4" or 1-6" be enough port area? Or maybe 3-4"? Second question, how to port through the rear deck? The box will be 10.5" tall and the bottom of the rear deck is about 16". Do I just place the Ports under the holes and call it good? Or run the Ports up to the rear deck and have them try to blow through the factory carpet? Or cut holes in the carpet, run the Ports up to the deck to blow through and put grills over them so it looks like 1-3 speakers on the rear deck. Depending on how many Ports I run.