the1uwannab

i found the cut sheets from fi it says 1.20 after displacement would that be better or should i just do the 1.5 after displacement?

So do the 1.5?? Also i forgot to state im gonna be using a zed audio minotaur II at 2 ohm so roughly about 1300 rms

I have a bmw 328xi sedan and im gonna be running a single 12" fi q in a sealed enclosure because i wanted more sq the sub has the high qts option and the heat ring the website says .8-1.5 cu. ft what im wondering is what would be optimum size for the best sq for a wide range of music.