DS18 IXS10.4S 10" Car Subwoofer 1200 Watts 4-Ohm SVC Shallow Mount, shallow mount subwoofer
BOSS Audio Systems CXX8 Chaos Exxtreme Series 8 Inch Car Audio Subwoofer - 600 Watts Max, Single 4 Ohm Voice Coil, Sold Individually, For Truck, Boxes and Enclosures, Use With Amplifier
V154DV2 - 15 Inch Dual 4-ohm High-Performance 550W RMS / 1500W MAX Power Handling Subwoofer - Cerwin Vega