AudioPipe TXX-BDC4-12 Dual 4 Ohm 12 inch 2,200 W Car Subwoofer, Black (2 Pack) - Walmart.com
CAB Ultra 10" inch DVC Dual 4 Ohm (Ultra Series) Car Subwoofer 1500 Watts RMS
Peerless by Tymphany SDS Series 830855 4" Woofer 8 Ohm
Crunch Crw12d4 12 Inch 800 Watt Max 4 Ohm Dual Voice Coil Car Subwoofer Speaker With 2 Channel 1000 Watt Amp A/b Class Car Audio Stereo Amplifier : Target