The Bobcat is right on the money on this one. I have talked about it briefly before, but i will quickly descibe again.
We sailed the tybee and obx 500 races with a flash drive MP3 player, set of water proof west marine speakers, and a canablaized amplifier board inbetween the two. We realized after the initial test run that for heavy air (when you need heavy air music) the speakers needed some extra kick. The amp board came out of a pair of old school sony portable speakers. The set up had a battery life of 16 hours (thank god we never needed all 16 hrs of it), was really loud, and weighed almost nothing. (speakers were the worst offenders). Rick White even did a blerb about the set up and accused us of listening to ABBA?!?!?!?! ouch, that hurt.
Chris
www.acceleratedchaos.com