Preacher, to be honest, I think you'd be lucky to hear anything with a CD player at full volume with installed speakers and the bike at idle - especially if you've installed any type of pipes. At speed, FUHGEDABOWDIT. An MP3 player with earbud/clip-on speakers at cruisin' speeds in a full-face helmet sounds pretty good, and is about as good a sound as you'll get. There was a post around where I attempted to disassemble and reassemble a set of walkman type speakers into a full face helmet. They sounded really good, but didn't last very long. Let us know what you come up with.