Amazon.com: H YANKA 10 Inch Subwoofer - 10 Inch Paper Cone Subwoofer Car Audio, Black Steel Basket, Dual Voice Coil 2 Ohm Impedance 10 subwoofer, 1200W MAX Power 10 inch Competition Subwoofer : Electronics
BOSS Audio Systems CXX10 Chaos Exxtreme Series 10 Inch Car Audio Subwoofer - 800 Watts Max, Single 4 Ohm Voice Coil, For Truck, Boxes and Enclosures, Use With Amplifier
Pioneer TS-WX106B Single 10 inch Sealed Pre-Loaded Enclosure Subwoofer - (Single 4 ohm voice coil)