ALPINE X-W12D4 12" 900 Watt RMS Car Audio DVC Subwoofer+Vented Sub Box Enclosure - Rockville Audio
Amazon.com: Universal Car Stereo Paintable Ported Dual 12" Alpine X-W12D4 Type X Car Audio Subwoofers Custom Sub Box Enclosure Package New : Electronics
Alpine Audio 12" Type R & Type X Custom Aero Ported Box X-W12D4 R-W12D4 R-W12D2 | eBay
Alpine SWX-1242D (SWX1242D) 12" Dual 4 ohm Type-X Car Subwoofer
Alpine | X-W12D4 | 12" X-Series Subwoofer
ALPINE X-W12D4 12" 900w RMS Car Subwoofer+Sealed Sub Box+Mono Amplifier+Amp Kit - Rockville Audio
Alpine X-Series 12" Dual-Voice-Coil 4-Ohm Subwoofer Black X-W12D4 - Best Buy