Amazon.com: Cadence 8 Inch Car Subwoofer, High Performance 800 Watts Dual 2 Ohm 2 Inch Black Aluminium 4 Layer Voice Coil, Ultra Shock Series Car Audio Woofer US8D2, Single : Electronics
Rockford Fosgate P2D2-8 Punch P2 8" subwoofer with dual 2-ohm voice coils at Crutchfield
Skar Audio SVR-8 D2 8" 800 Watt Max Power Dual 2 Ohm Car Subwoofer - Walmart.com
Kicker CompVR 07CVR82 8" subwoofer with dual 2-ohm voice coils at Crutchfield
KICKER CompR 8 Inch 2 Ohm DVC 600W Peak Power Car Audio Subwoofer, Black - Walmart.com
Sundown Audio SD-4 8" inch DVC Dual 2 Ohm (SD-4 Series) Car Subwoofer 600 Watts RMS