Sundown's SA-12 single box design

[jpick]

Here's a resource on port calculations:

http://www.jlaudio.com/header/Support/Tutorials/Enclosure+Ports/Tutorial%3A+Enclosure+Ports/287541

Ideal port area is calculated with the Richard Small's estimate, here are the equations: http://www.carstereo.com/help/Articles.cfm?id=21 DO NOT use use the table for radiating surface area, get that instead from the manufacturer of your sub(s), hope that clears up your questons.

Thanks Joe!