I've dreamed of a bicycle sound system for years. I've tried several, even jury-rigged a few of my own, but always ended up discarding them 'cause they sounded lousy, fell apart, or were just a hassle to deal with. But two trends might make decent cycle-sound systems possible.
First there's Bluetooth, which lets you stream MP3s, Internet radio, and podcasts from your smartphone. Then there's the recent explosion in relatively high-quality miniature sound systems like the Soundmatters FoxL and the Jawbone Jambox.
The $99 NYNE Multimedia NB-200 is one of the first Bluetooth speakers designed specifically for cycling. Its driver layout-two 1.5-inch drivers with a 3- by 1.5-inch passive radiator-is somewhat similar to that of a FoxL. While you can get a bike mount for the FoxL, the NB-200 was designed from scratch as a bike speaker. The enclosure has slots that match up with a couple of handlebar clips.