Alpine SBR-S12D4 Type-R 12" Subwoofer Enclosure - Signature Car Sound
Alpine SWR-1243D 12" Type-R Car Subwoofer
LAB SlapBox™ 2.25 ft^3 Ported MDF Enclosure Box for Single Alpine 12" Type-R Subwoofer
Best Buy: Alpine Type-R 12" 1000W Subwoofer Black SWR-12D4
Alpine SWR-1242D Type-R 12" subwoofer with dual 4-ohm voice coils at Crutchfield
Alpine SWR-T12 | Performance Car Audio Visual
Alpine Type R 12" Dual Voice Coil 4ohms | P.C. Richard & Son
Alpine SWR-1242D Type-R 12" subwoofer with dual 4-ohm voice coils at Crutchfield
Alpine R2-W12D4 R Series 12" subwoofer with dual 4-ohm voice coils at Crutchfield
SWR-12D4 | 2250W Peak 12" Series Dual 4-Ohm Car Sub | Alpine
Alpine SWR-1221D (swr1221d) 12" Car Subwoofers - Sonic Electronix
Vented Subwoofer Box for Alpine Type R12 (E12, S12, or X12) | 3D Warehouse
Alpine R-sb12v 12 inch Linkable Subwoofer Enclosure for sale online | eBay
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)
Alpine SWR-1222D Type-R 12" subwoofer with dual 2-ohm voice coils at Crutchfield