Amazon.com: DS18 SLC12S Car Subwoofer Audio Speaker - 12" in. Paper Glass Fiber Cone, Black Steel Basket, Single Voice Coil 4 Ohm Impedance, 500W MAX Power and Foam Surround for Vehicle Stereo
Jensen J12W 12-inch 1200 Watts Peak Power Polypropylene Subwoofer with Reinforced Stamped Steel Basket and 40oz Magnet - Walmart.com