Usefull links when trying to build a sub.

Have been thinking of trying to build a subwoofer (sonosub) and found some pretty usefull web links I thought I would share with you all.

Pretty much any shape sub you want to build - here is how to determine its interior volume and what size port you need to tune it. (I think you need to subtract the port volume from your overall sub volume. Important to keep in mind when you are trying to tune low and the ports are large both in length and diameter)

The above link lists things in cubic feet and many wesites recommend volume based on liters. Here is a good conversion page to let you convert almost any size to any other....

There are alot of sub manufacturers out there, but the tempest, Shiva and Malestrom sub lines were pretty well regarded in DIY circles. There is an updated version of these now available (the original company went out of business).

I found a local supplier of sonotubes by looking up "concrete forms" in the local yellow pages. I use this to look up almost any address or phone number whenever I travel. (can use with my phone and works great - just change location)

Anyway - just thought you might find some of the links useful.

Michael