For sheer power per dollar, Dual vehicle subwoofers are at the front of the pack. Both the DVC and DLS car subwoofer series use innovative audio technology to get more slam to your ears. With a Dual 12-inch subwoofer, you can immersive almost any vehicle with a booming musical foundation. Mount them in the factory opening or an enclosure to fine-tune the sound. Dual subwoofers always ship free to the lower 48 states from OnlineCarStereo.com.