How to make your own amp and speakers
Step Five – Choose your speakers
Once your 'Uber Amp 9000' is done, attach it to your exciters using two wires per exciter and hooking them up to the terminal block connectors on the amp. If you skipped DIY gadget class, all you need to know is that exciters are small resonating coils that turn any surface into a speaker with their vibrations.
Once you've worked that out, just decide where you want to party: a wooden shelf will do nicely but even something like a cereal box will work. Daniel Hirschmann from Technology Will Save Us made this Vimeo vid to show his completed project, using his BlackBerry and some cardboard.