I have been messing with bassbox pro and AutoCAD about all day and keep coming up with more questions. I am not real good with the bassbox software. Anyways, I plan to purchase a single T5-12 to run in the truck of a 2002 cavalier. The dimensions I have to work with are 32.5W x 17H x 10.5D; might be able to get another inch in depth. I want the sub to fire into the cabin. I listen to a variety of music; maybe lean more towards heavy bass styles. Thinking a ported design would be more suited for the T5-12 woofer. I had two 10s 300rms in a sealed enclosure and they just didn’t produce a lot of SQL. My amp will push 800rms at 4ohm.