Amazon.com: Planet Audio BBD12B 12 Inch Car Subwoofer - 2500 Watts Maximum Power, Dual 4 Ohm Voice Coil, Sold Individually, Black : Electronics
DS18 EXL-X15.4D 15" Car Subwoofer 2500 Watts Dvc 4-Ohms
Planet Audio BBD12B Big Bang Series 12 Inch Car Audio Subwoofer - 2500 Watts Max, Dual 4 Ohm Voice Coil, Sold Individually, For Truck Boxes and Enclosures, Hook Up To Amplifier - Walmart.com