ported box design for rockford t1 12

[boltdbz]

I'm currently in the middle of designing a box for a Rockford T1 12. I was going to use the Powerful Enclosure design that Rockford usually posts for their Power line but they seem to have discontinued it. The problem is that their current vented design is only tuned to 40Hz, and I'm looking to hit probably around 30-32Hz. I used the 12Volt port size calc but the port ends up being smaller for some reason, which seems wrong. Am I tripping?

[Joe X]

Here is a suggestion for the RF T1-12 trunk car, port/sub frontwards/backwards:

Enclosure Specifications:

Fb = 33 Hz
Vb = 2.25 ft^3

External Height = 14 in
External Width = 30 in
External Depth = 17.75 in

Port Width = 2 1/2 in

Cut Sheet List:

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

External Enclosure Parts:

2 x Front & Back (3 parts) = 30 x 14

Left & Right Sides = 15 1/2 x 12 1/2

Top & Bottom = 30 x 15 1/2

L Port Internal Assembly Parts:

Front to Back = 13 x 12 1/2
Extension = 10 3/4 x 12 1/2

Assembly guide (generic dimensions):

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

- The port needs 2 1/2" of free airspace in front of it for proper operation.

- Setting your amp's subsonic filter to 28Hz is suggested.