I think the original inspiration for this came from a brief Youtube video showing a similar bike trailer being hauled around at San Francisco Bike Party. After building this trailer, it seemed feasible to make a stereo system as a modular accessory. That way, any bicycle could be used to haul enough music for a portable bike party!
I learned more about subwoofer enclosure design in this project — the box has a tuned subwoofer section.
