Decided on Theater 4Pi using Delta 15 for my set amp. That way I can also use them with my 240w/ch SS amp if I ever need to be really loud.

Could I get the plans for these speakers?

Thank you very much!

The plans are much appreciated.

One question, do I need any bracing, if so where do I put them and what kind do I use?

In most cases, you'll want to tie front to back and side to side, so a pair of braces should be used, shaped like a plus or a cross. This also serves as a convenient place to hang a piece of fiberglass insulation that spans the cross-section of the cabinet. Cross-section insulation attenuates midrange frequencies but bass passes right through.