Best Buy: Alpine Type-R 12" 1000W Subwoofer Black SWR-12D4
Alpine R-W12D2 Car Audio Type R Dual 2 Ohm 1500 Watt 12" Subwoofers with Sub Install Kit Package : Electronics
Alpine SWR-1242D Type-R 12" subwoofer with dual 4-ohm voice coils at Crutchfield
Alpine | R-SB12V 12" Alpine Halo Subwoofer with ProLink™
Alpine SWR-1242D Type-R 12" subwoofer with dual 4-ohm voice coils at Crutchfield
Alpine R-W12D4 R-Series 12" subwoofer with dual 4-ohm voice coils at Crutchfield
FS: Alpine Type R 12" sub + JBL BP300.2 mono amp - BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)