2) MEMPHIS MJP1244 12" 1500W RMS MOJO PRO SERIES DVC 4-OHM CAR AUDIO SUBWOOFERS - Walmart.com
Boss Audio Systems 10 in. 1500-Watt Car Subwoofer Audio DVC Power Sub Woofer 4 Ohm Stereo CH10DVC - The Home Depot
Amazon.com: Massive Audio SUMMOXL104-10 Inch Car Audio Subwoofer, High Performance Subwoofer for Cars, Trucks, Jeeps - 10" Subwoofer 1500 Watt RMS, 3000w MAX Dual 4 Ohm, 3 Inch Voice Coil. Sold Individually : Electronics