http://afrotechmods.com/cheap/hdspeakers/hdspeakers.htm

LITERAL:
Why pay 500$ for Klipsch’s latest speaker system? You can make something that looks way cooler for the price of a DIY amplifier and some HDDs out of a dumpster. It doesn’t sound quite as good but who cares! There really isn’t much to say about this project… It’s fun as hell to watch, easy to do, and impressed the crap out of everyone I’ve showed it to. Just download the movies already. But first here are some pictures:

Video1 [divX]
Video2 [divX]
Video3 [divX]