Need help building box for a Fi sp4 12 v1

[DDaudioforLife559]

Wat box specs i need to build a single 12 box for sp4 12 Fi tuned at 32hz running of a cresendo bc 3500k plz help

[BYTizzle]

What are the dimensions of the space you have available?

[DDaudioforLife559]

I have a 2015 chrysler 200 big trunk had a few systems in there already but ima go with doin a single 12 setup i got 2 sp4s but power only for one i had a 15 in there box was 36w16 3/4 H 20 depth so i got room any ideas on design 

[DDaudioforLife559]

You kno wat fuk it ima run 2 wats a good design for a 2015 chrysler 200 2 Fi sp4 12s

[BYTizzle]

Its going to be a BIG box from what I can see to meet the required air space, port area, and mounting depth of those subs.  The suggested enclosure specs for those are pretty vague too, and since I have no experience with them specifically, I went with something in the middle of their 1.8/3 cubes net per sub. 

But:
36w, 16.5h, 26d, 15h by 6w port 36" long puts you at 4.85 cubes net at 32.6hz with 90sqin of port area.  That would be a 3 common wall L port box, you could prolly do a center port 2 common wall box but Im no help if you want to go that route. 

[DDaudioforLife559]

Big box maybe sacrifice depth to 23inch and height to 14 1/2 to 15 inch should be good i can do 38 width aswell 

[DDaudioforLife559]

My last dual 12 box for Fi ssd was. 38w14 1/2 h 23 1/2 depth 33hz

[DDaudioforLife559]

Would i be ok with same box 

[BYTizzle]

38x15x24 with a 13.5x6 at 40" long port puts you right around 4 cubes net 33hz basically.  drops port area to 81sqin. 

[BYTizzle]

Should work since you will be a little light on power!