Discarded tires are a real eco threat because not only it is difficult to recycle them, once past their life, they have little value for reuse as well. Putting old tires to good use is what the Automan 500 subwoofer design does. Moving on a different line from convention, the Automan 500 subwoofer has a circular design in place of the cabinet/ cuboid shape most others have.
Designers Carolyn Butts and Hans Honegger say that the circular/cylindrical shape allows the subwoofer to have a better sound quality, and its unique construction helps it to emit all the bass notes. Housing for the Automan 500 is made from discarded stock car tires. Innertube from discarded tractor tires, discarded bicycle tires, and recycled buckle all play their part in the construction.
Materials used are locally produced and sourced, and the cushion for the subwoofer is made from renewable wheat straw fiber. Handmade by local artists, each of these subwoofers is custom made. The Automan 500 is an entry in the Greener Gadgets competition, much like the Corky mouse we saw earlier.
Source: Greener Gadgets