Need help designing box for dual 12 Rockford Fosgate P3

[Wrekonize]

So i made my mind and going to find someone to build me the best box for my 2 12 P3s 2009 version. Plz need help dont know if it matters but putting in a 2006 grand prix but need pics or measurements whatever i was going to buy a probox but i hear do custom so i will do that

[Joe X]

Measurements that will fit in the way in and what amp you will be using.

[Wrekonize]

W: 36 inches

H: 14.50

D: about 36

Amp hifionics glx 1400.1 mono block

[Lifted2000Ford4x4]

what music will you be playing? want a flat response? 36hz. want lows 30-34hz. my box for 2 15's is tuned to 33.5 hz and it sounds great, lows really pick up.

[Joe X]

Here is a suggestion:

Enclosure Specifications:

Fb = 34 Hz
Vb = 3.8 ft^3

External Height = 14 in
External Width = 36 in
External Depth = 21 in

Port Width = 4 1/8 in

Cut Sheet List:

* All Dimensions in Inches.
* Wood Thickness is 3/4 for all Parts.

External Enclosure Parts:

Front & Back = 36 x 14

Left & Right Sides = 19 1/2 x 12 1/2

Top & Bottom = 36 x 19 1/2

Shared Port Internal Assembly Parts:

2 x Front to Back = 17 7/16 x 12 1/2
2 x Extension = 2 x 12 1/2

Assembly guide (generic dimensions):

Important notes:

- The 45s if you want to do them are 2 1/2" wide except the one/ones inside the port, if you want that let me know.

- All boxes built outside the vehicle need to fit in their way in not just have the right dimensions.

- The port needs 4 1/8" of free airspace in front of it for proper operation.

- Setting your amp subsonic filter is suggested.