The Audio Backpack
We weren't able to find a place to park our boom car when we moved to Manhattan (that might explain why the girls from JJ Fad stopped kicking it with us around that time), which is why the Audio Backpack will just have to do. It's a backpack with flap-mounted two directional 5 watt speakers that can be repositioned for maximum annoyingness to your fellow pedestrians and subway riders. There is, of course, a slot for holding your MP3 player or CD player (or Walkman, if you still swing that way), and they claim that you should be able to get ten hours of public nuisance-time before you'll have to replace or recharge its six AA batteries.
