Link: http://www.josepino.com/other_projects/index.php?homemade-hifi-speaker.jpc
1 Foam plate.
2 strips of paper.
2 business cards.
1 Copper wire
Tape.
Glue.
1 Neodymium magnet.
1 Audio plug.
10 minutes.
and you have your speaker ![]()
Repeat for stereo!