Kicker 43CWRT672 CompRT 300 Watt 6.75 inch Shallow Mount Subwoofer - Dual 2 Ohm Voice Coil
DC AUDIO 6.5" 2 ohm Dual Voice Coil Subwoofer 300/600 Watt NEW | eBay
Rockville W65K9D2 6.5" 1000w Car Audio Subwoofer Dual 2-Ohm Sub CEA Compliant
Memphis Audio MJM622 Mojo Reinforced Car Subwoofer Bundle with Protective Grille. 6.5" Sub, 700W RMS, Dual 2-Ohm, Compact with Big Competition Power - Walmart.com
2) American Bass XD 65 XD65 6.5" Car Audio Subwoofers, 4 Ohm Subs, 300 Watts | Audio Savings