It's the end of an idyllic day. Your engine is burbling through the no-wake zone, water's chuckling against the hull. The sunset is molten gold. It's perfection, and yet…you can't place it, but something is missing. A something to make this moment last forever. You know, like a scene from a movie. I'll tell you what's missing-a soundtrack. You've known it since seeing Lawrence of Arabia-life would be nine ways better if it had background music. And not just any music-your music. Scored by the Great Mancini in the Sky, it would always be there, marinating your maritime life in surround sound. Some pounding Aerosmith when you're flying high and hard offshore, or a little Miles Davis for times like now as the sun slides into the sea. The problem is, the stock marine stereo systems on most boats are more suitable to providing background to a Warner Brothers cartoon, not a life of high romance and drama. I bet Yugos came better equipped for sound than your boat. To find out how to repower what you have or learn how to get the right marine stereo system for your new boat, we tracked down John "The Ear" Marrero. A systems designer at Custom Sight and Sound (954/527-5554), near Palm Beach, Florida, he's created musical experiences on everything from 15- to 150-footers. He also knows how to make your boat worth listening to without being accompanied by the sound of your bank account being flushed down the drain. Let's hear what he has to say.