An anonymous reader sent us a link to these neat speakers made from used cans. Oddly enough they convey a rather chic sense of style. The instructions are written in german – but you can pretty much infer the necessary steps from the supplied images. I’m guessing they may sound a bit “tinny”? – Link
Fold-Up Speakers – Link.
From the pages of MAKE:
Make – Volume 12 – Styrofoam Plate Speaker (DIY: Music) (Page 131) – Link.