This sub system will give you more bass in your car or truck?? without giving up tons of space to get it</br>1A is a 12 powered subwoofer that gives you everything you want out of a car subwoofer</br>This is a complete system with the subwoofer?? enclosed in a box?? along with a built in amplifier</br></br>Product Description</br></br>The Rockville RVB12.1A is a 12 powered subwoofer that gives you