GRS 12SW-4HE 12" Paper Cone Rubber Surround High Excursion Subwoofer 4 Ohm
Jensen J12W 12-inch, 1200 Watts Polypropylene Subwoofer, Peak Power with Reinforced Stamped Steel Basket and 40oz Magnet - Walmart.com
Polk Audio db1240 db Series 12" 4-ohm subwoofer at Crutchfield
Amazon.com: Massive Audio SUMMOXL124-12 Inch Car Audio Subwoofer, High Performance Subwoofer for Cars, Trucks, Jeeps - 12" Subwoofer 1500 Watt RMS, 3000w MAX Dual 4 Ohm, 3 Inch Voice Coil. Sold Individually : Electronics