Long car trips can be really boring, but a good car amplifier will keep you rocking as you drive down the road. They're also great for sharing your music with your friends at a party or while camping out. These units can be mounted in an easy to reach location. The best car amplifiers don't just make the music louder, they also play MP3s and give you the ability the adjust the bass. Some allow the connection of a woofer. Look for a good car amplifier with a remote control so you can adjust it as you're going down the road.