It's truly amazing what Mario fans come up with I think, check out this mario styled subwoofer!
"My friend offered to build me a subwoofer from scratch, so I came up with this design. This is of course the question mark block and brick block seen in the original Super Mario Bros.! He built it to the correct dimensions and then I painted it. I am satisfied with how it turned out!
To clarify: We calculated what the internal volume of the enclosure was supposed to be for maximum performance and based on that made a box that had that volume but was also the size of 2 cubes side by side.
Also the enclosure was built from scratch, but the Woofer is actually a 12" Shiva for those wondering.
And yes, the sub sounds amazing in my car!"