School me on boxes

[From_the_Valley]

Noob question beware - my current and very first sub setup from high school is 2 Rockford p1's in a sealed under seat box in my nissan Titan and they suck at hitting lows. I want to get either 2 SA-10's or 12's so should I build a sealed under seat box or a regular ported box to hit good lows? Or an underseat box with aero ports? It'd be nice to keep them under the seat but airspace is limited so I could always fold up the back seat if I had to. Basically can I still hit good lows with the right sealed box or should I build a big ported box at around 33hz? Thanks

[Joe X]

The big ported box will get you the low end you want for sure, even a single SA12.