I stumbled across Jose Pino’s and saw this interesting page on how to build your very own homemade speaker, this is really quite something. As long as you have everything needed: a plastic cup, business cards, wires, magnets and some Lego blocks. I haven’t actually tried this myself but seems very interesting and impressive…

Visit Josepino’s page: How to make a speaker… and you’ll be explained about how this will work.