Inflatable Loudspeakers
fm6 sent in an article running at New Scientist talking about new technology that allows Inflatable Loud Speakers. The technology is apparently patented and there's not a lot of technical details, but I have to say the concept amuses me. And I somehow doubt that this technology will ever be used in high fidelity home systems.
If these inventors have some way to make a balloon as rigid as 3/4" birch plywood with closely spaced transverse braces, the article doesn't mention it.
I think most of us probably have an image of some cheap inflatable pool float, but we don't really know what materials this is made out of or what pressure it is inflated to. Put it this way, what if the enclosure were made of tire rubber and inflated to 250 pounds pressure, with cross braces etc? It would probably be pretty rigid.
Now, I doubt that scenerio that I just laid out would give you any weight or cost savings, but it's an idea of how this might go if that used more interesting materials. :)
Sometimes it's best to just let stupid people be stupid.