Best Buy: Alpine Type R 10" Dual-Voice-Coil 4-Ohm Subwoofer SWR-1043D
Alpine R-W10D2 Car Audio Type R Dual 2 Ohm 1500 Watt 10" Subwoofers with Sub Install Kit Package : Electronics
Best Buy: Alpine Type-R Thin 10" Single-Voice-Coil 4-Ohm Subwoofer Black SWR-T10
Rent to Own (2) Alpine R-W10d4 10" Dual 4 Ohm Type-R 2250w Pro Loud Subwoofer Speaker Sub ,Lease to Own (2) Alpine R-W10d4 10" Dual 4 Ohm Type-R 2250w Pro Loud Subwoofer