Here's an Instructable on how to make a pair of custom speakers. These speakers use a pair of Dayton Audio Sound Exciters that can turn virtually any surface into a speaker.
I did this because I still have 2 weeks to go before I return to college. I thought this would be a good idea to kill some time and do something productive, and I must say the results are pretty good. This will be my first Instructable so comments for improvement are welcome!
Here are the materials you'll need for ONE of these speakers (x2 if you want a pair):
Two 1/2" square rods(11 1/2" long)
One 1/2" square rod (9" long)
One wood board/block (2 1/2" x 1/2" x 10")
One Acrylic Sheet (0.080" thick, 8" x 10"
One Dayton Audio Sound Exciter
Two wood screws
Elastic string (a lot)
Here's a list of tools that may/will come in handy:
**Dremel (with mini-saw attachment)
Drill bits (1/16", 3/32" and 5/32")
Triangle/Right angle tool
**-tools used for cutting the wood pieces to the right size.
Note: There are a number of items on this list that aren't absolutely necessary, especially the tools. The ones listed here are the ones that I used when making this particular pair of speakers.