How to calculate ported box volume

[Thatspiveydude]

Hey. I'm new to Smd so I'm sorry if there is already a thread on this topic. It is my first time building a box for a sub and I'm quite clueless. It is for a sundown audio sa-12 and needs to be 2 cubic foot and tuned to 35hz. The only problem I am having with the box is displacement of the port and I have no idea how to calculate it! So if anyone can give me the specs they used on their sa-12 or tell me how exactly to calculate port displacement that would be great!!

[jeffrm]

Get Torres box tuning calculator off of here it will help you out. Just read the tutorials and youll get it

Edited July 6, 2012 by jeffrm

[Joe X]

Hey. I'm new to Smd so I'm sorry if there is already a thread on this topic. It is my first time building a box for a sub and I'm quite clueless. It is for a sundown audio sa-12 and needs to be 2 cubic foot and tuned to 35hz. The only problem I am having with the box is displacement of the port and I have no idea how to calculate it! So if anyone can give me the specs they used on their sa-12 or tell me how exactly to calculate port displacement that would be great!!

Here is a suggestion for a trunk type of car:

Enclosure Specifications:

Fb = 35 Hz

Vb = 2 ft^3

External Height = 16 in

External Width = 27.25 in

External Depth = 14 in

Port Width = 2 in

Cut Sheet List:

* All Dimensions in Inches.

* Wood Thickness is 3/4 for all Parts.

External Enclosure Parts:

Front & Back = 27 1/4 x 16

Left & Right Sides = 12 1/2 x 14 1/2

Top & Bottom = 27 1/4 x 12 1/2

L Port Internal Assembly Parts:

Front to Back = 10 1/2 x 14 1/2

Extension = 12 1/2 x 14 1/2

Assembly guide (generic dimensions):

Besides this, there is a new tutorial recently posted if you want to learn the process.