Alpine SWR-1222D Type-R 12" subwoofer with dual 2-ohm voice coils at Crutchfield
Bass Package: Dual 12" Type-R Series Subwoofers w/ Ported Enclosure
12" ALPINE TYPE R PORTED Subwoofer Box Sub Enclosure | eBay
SWR-12D4 | 2250W Peak 12" Series Dual 4-Ohm Car Sub | Alpine
need help building ported box for my alpine type r - Car Audio Forumz - The #1 Car Audio Forum
Does anyone have a suggestion for a grill for this Alpine type R 12” that I just got? I can't find the Alpine version in stock anywhere. Thanks! : r /CarAV
Box design for 2 alpine type R 12 | Car Audio Forum | CarAudio.com
Subwoofer Box Alpine Type R SWR-1242D | Ported Box | Slot
Alpine SWR-12D4 3000 Watt Type R Car Subwoofer + Vented Sub Enclosure Box - Walmart.com
2) Alpine Type-R SWR-12D4 12" 6000w Dual 4-Ohm Car Subwoofers + Vented Sub Box - Walmart.com
Alpine type r 12 | Car subwoofer, Subwoofer, Car audio
Alpine | R-SB12V 12" Alpine Halo Subwoofer with ProLink™
Alpine SWR-12D2 Type-R 12" subwoofer with dual 2-ohm voice coils at Crutchfield
Metra 12" Single Ported Subwoofer Enclosure Charcoal TCBXP-112 - Best Buy