Alpine’s X-Series subwoofers are designed to deliver a loud output while still maintaining the details of your music, so you get the best of both worlds. The X-W12D4 can perform up to 900-watts for a powerful, loud performance. Built with a powerful motor comprised of a premium, elongated voice coil and triple stacked ferrite magnets, you’ll get the most air movement from your sub resulting in accurate sound reproduction for the bass you crave.