Give your music, shows and videos the strongest foundation with a JL Audio car subwoofer. They make dozens of vehicle subwoofer drivers to fit your needs, design ideas and budget. Choose from component subwoofers, powered subwoofers, pre-mounted subwoofer boxes and many more that outperform factory woofers. OnlineCarStereo.com also has mono amplifiers, enclosures and other supplies you’ll need. Customize the low-end sound in any vehicle by choosing high-end speakers that have a 60-day satisfaction guarantee.