Alpine SWR-10D4 is a powerful subwoofer that delivers deep, accurate bass for your car audio system. With a peak power handling of 1000 watts and an RMS power rating of 500 watts, this subwoofer can handle even the most demanding musical passages. The SWR-10D4 features a dual voice coil design, allowing you to wire it to a variety of amplifiers for maximum flexibility. The subwoofer's injection-molded polypropylene cone and rubber surround provide excellent durability and sound quality, while the stamped steel basket ensures rigidity and heat dissipation.