Hey I recently blew my RE SX 12", in the subwoofer section. I am now going with a RE XXX 08' 12" in my jeep with a hifonics BXi-2008D amplifier. I need to save up space since im putting this in the turnk of my jeep and so I would like to go with aeroports to port the enclosure. Only problem is that I have no idea on how to construct a box with aeroports. I need a design that will give me about 2.2 c^3 or more tuned to 32-3.4hz. I have a few constraints. My box cannot be any larger than 28x13x19(LxWxH). I would like to have this box designed more towards SPL. I also NEED to have the sub facing up, but the ports can be on the top or sides.