Braces

Hi akira, there are no particular specifications for braces except that they should do just what they say...brace your enclosure to prevent it from flexing. The shape and number of braces you will use will depend on the shape and size of your enclosure. Also when designing and building your enclosure, you should take into account the volume occupied by each brace when determining your interior volume. This could lead to a slightly larger enclosure than you may have first anticipated. You can use any rigid material such as ¾ MDF or plywood (oak or birch) to make your braces. ~wirewise~ Verify all wiring with your meter before making any connections!

 Check out this link From JL audio. http://www.jlaudio.com/tutorials/bracing it gives you a good idea on how to brace an enclosure.

thx that really helped they go into good detail.  At JL.