if you want to maximize your decibles out of your wall and are going to port it, which i highly recommend, i would also recommend that you do a slot port ( square shaped port ) it is built in to the box and in my opinion it is easier to tune and cuts down on port noise, as mentioned before, with 6 12" subs no matter where you put them they will be loud but the closer to the dash, the less airspace they have to push throught therefore the louder they will be, make sure you have enough power running to them amp wise and enough juice running to those amps, such as extra batteries bigger alternator capactiors etc. good luckhope some of my two cents helped a little