I have a one 12" Alpine Type R (4-ohm) DVC sub that I'm powering with a Alpine MRD-M605 mono amp. I want to build the best box for this single sub. I have the space for 30"-16"-16" (W-H-D) in my 1996 Honda Prelude. I want it tuned to around 32hz and ported. I would like advise/diagrams of best box for this sub.