This 10" powered sub woofer gives everything you want out of a car sub woofer. This is a complete system with the sub woofer, enclosed in a box, along with a built in amplifier. Powered by a powerful built in amplifier,it will keep you rocking with clean power. We also eliminated air or mechanical noises that you do not want to hear. This model features an electronic low pass crossover that is fully adjustable so that you can customize it for your car's listening environment (though we recommend keeping it at that low 45-60Hz range). If you want loud and tight bass in an all-in-one package that will install in a relatively tight space, then get 10" Powerful Amplified Sub Woofer today!