Can someone design me a box?

[kevinsong]

I need help with designing a ported subwoofer box for two sundown sa-12 4 ohm's. I have a skar sk-1500 amp powering them. The max dimensions for the box is Height- 22 in, Width- 42 in, Depth 13 in. The recommended settings is 4 ft^3 total and tuned at 35-37 hz. I need a round port. Thanks a lot!

[Joe X]

Here is a suggestion, vehicle model found in an older thread:

Enclosure Specifications:

Fb = 35 Hz

Vb = 4 ft^3

External Height = 21 in

External Width = 36 in

External Depth = 13 in

Cut Sheet List:

* All Dimensions in Inches.

* Wood Thickness is 3/4 for all Parts.

External Enclosure Parts:

Top & Bottom = 36 x 13

Left & Right Sides = 11 1/2 x 19 1/2

Front & Back = 36 x 19 1/2

Port Quantity and Dimensions:

Number of Ports = 1

Pipe Port Diameter = 6

Pipe Port Length = 11 1/8

Assembly guide (generic dimensions):

I would add that although a 6" flared aero can work a slot across the bottom could optimize port area of your box and may be a better alternative.