Summary

Printable ribbon speaker.

Instructions

Print the three parts.
Get two neodymium 100x10x5mm magnets and install in front ribbon part.
Use household Al foil or buy good full hard Al foil from McMaster. .001" thick should do.
Cut the foil into strips (like applying window film) sum of strips plus spacing should be 15mm.
Apply Kapton tape over foil and trim to 15mm x 150mm.
You should crimp the ribbon, any pattern is suitable, however it is common to use accordion crimping.
Feed the ribbon through the slots in the back ribbon part.
Attach leads to the Al foil side and pull the ribbon taught, tape down with more Kapton tape.
Assemble everything and test it.

To test it I just hooked up a 5w amp and it worked well. Freq sweeps I tested is 2k to >20k response. The mic cannot detect higher than 20k accurately.

With that test it works. It will work better with an audio transformer to correct the impedance mismatch to the source. I am still designing one for this tweeter. StandBy.

My ribbon looks bad, but it sounds okay. To improve the output it is important to get the Al as close as possible to the magnets without touching. It doesn't take long to make the ribbon and the materials are inexpensive so many tries can be made to perfect it.

Sample video of speaker in use:
http://www.youtube.com/watch?v=HuWMWJt0-uI&feature=youtu.be

Ribbon Tweeter