All of these plans for subwoofer enclosures are based on a JL Audio 10W1 subwoofer. These plans to build a subwoofer box are simple and are only meant to be used as an example for your own subwoofer enclosure. Each subwoofer is different and you will need to design a plan for your subwoofer enclosure. Each subwoofer enclosure was modeled in WinISD and the output curves are shown for each subwoofer box. A basic plan for each subwoofer enclosure is included. If you're unsure of what type of enclosure or what size to build for your subwoofer contact the manufacturer. They know the subwoofer better than anyone and they should be able to help you with your specific situation.
You should also check out Advanced Enclosure Design and Fabrication. It covers designing enclosures using free computer software, maximizing the output of a subwoofer system, building the box like a pro and testing the output using inexpensive equipment. Click here.