Alpine SWS-12D2 Type-S 12" subwoofer with dual 2-ohm voice coils at Crutchfield
NX3A-12D2 NITRO X 12" 500 WMAX /250 WRMS DUAL 2 OHM – GENIUS AUDIO USA
Alpine SWR-12D2 Type-R 12" subwoofer with dual 2-ohm voice coils at Crutchfield
SYNESTER 12D2 Subwoofer
Amazon.com: Genius Audio N6-12D2 12 Inch Car Subwoofer 400 Watts RMS - 800 Watts Max High Power Pro Audio Sub Speaker Steel Basket Car Audio Speaker Ferrite Magnet 2 Ohm Copper Coil
Alpine 12 Inch Type-S Subwoofer (SWS-12D2/D4) | SK Customs Car Audio & Home Theater | Atlanta | Norcross | Duluth | John's Creek