Alpine SBR-S12D4 Type-R 12" Subwoofer Enclosure - Signature Car Sound
Amazon.com: Alpine ALP19-R-W12D4 Car Audio Type R Series Sub Dual 4 Ohm 1500W Peak 12" Subwoofer : Electronics
Subwoofer Box Alpine Type R SWR-1242D | Ported Box | Slot
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-8D2 8 inch 1000W Dual Car Non-Enclosed Subwoofer for sale online | eBay
Need help for ported box fro twin alpine type r 12” - Car Audio Forumz - The #1 Car Audio Forum
Alpine type R generations | CarAudio.com | Car Audio Forum
Single alpine type r 12" ripping car apart - YouTube
Alpine SWR-1242D Type-R 12" subwoofer with dual 4-ohm voice coils at Crutchfield