Alpine X-W12D4 ported subwoofer box SPECIAL EDITION with black plexi port trim | eBay
Alpine 12” Type X-Series Ported Bass Package Includes one Alpine X-W12D4 12” subwoofer, and 2.00 ft³ optimized ported enclosure
Alpine SWX-1043D at Onlinecarstereo.com
Alpine Car Subwoofer Type-X | 2015
2 X Alpine Type-R R2-W12D2 12" Subwoofers + Qpower QBOMB12VL 12" Dual vented 793276084668 | eBay
Amazon.com: Alpine X-W10D4 Car Audio Type X Dual 4 Ohm 1800 Watt 10" Subwoofers with Sub Install Kit Package : Electronics
Alpine SWX 1243D Type X 12 subwoofer How to wire the dual voice coils - YouTube
ALPINE TYPE X | Sub Woofer Speakers | Croooober
2) ALPINE X-W10D4 10" 900w RMS Car Audio Subwoofers DVC Dual-4ohm X-S – absoluteusa
Alpine SWX-1043D Type-X 10" subwoofer with dual 4-ohm voice coils at Crutchfield
Custom Ported Sub Box Enclosure for 1 12" Alpine Type X Subwoofer ~ X-Series | eBay
Alpine X-W12D4 X-Series 12" subwoofer Loudest Bass Subwoofer on Harmony Audio HA A800 1 - YouTube
Alpine X-W12D4 X-Series 12" subwoofer with dual 4-ohm voice coils at Crutchfield
Alpine X-W12D4 - 12" Dual Voice Coil Subwoofer | Pacific Stereo | Pacific Stereo
Amazon.com: Alpine X-W12D4 12-Inch Dual 4 Ohm Subwoofer : Electronics
Alpine Type-X SWX-1242D 12" subwoofer with dual 4-ohm voice coils at Crutchfield
User manual Alpine X-W12D4 (English - 13 pages)
SWX-1043D - Alpine 10" Type-X 3000 Watt Dual 4-Ohm Subwoofer
Alpine SWX-1243D Type-X 12 Subwoofer
Disassembly of an Alpine Type-X SWX-1243D (will post more as I get deeper) : r/CarAV
