Alpine 12” Type X-Series Ported Bass Package Includes one Alpine X-W12D4 12” subwoofer, and 2.00 ft³ optimized ported enclosure
Amazon.com: Universal Car Stereo Vented Port Single 12" Alpine S-W12D4 Type S Car Audio Subwoofer Custom Sub Box Enclosure Package New Without Amp : Electronics
Alpine S-Series 12" Dual-Voice-Coil 4-ohm Subwoofer Black S-W12D4 - Best Buy
Single alpine type r 12" ripping car apart - YouTube
Alpine Halo S-Series 12" Single 2 Ohm Preloaded Subwoofer Enclosure Black S-SB12V - Best Buy
Alpine S-W12D4 Car Subwoofer1800W Max, 600W RMS 12" Type-S Series Dual 4 Ohm Car Subwoofer - Walmart.com
Alpine Type R 12' SWR1243D Subwoofer | eBay
Alpine 12 Inch Type-R Subwoofer (R-W12D2) | SK Customs Car Audio & Home Theater | Atlanta | Norcross | Duluth | John's Creek
Alpine W12S4 BassLine Series 12" 4-ohm subwoofer at Crutchfield
Alpine R-Series RS-W12D4 12" Shallow Mount Subwoofer with Dual 4-Ohm Voice Coils
Compatible with 2002-2018 Dodge Ram Quad or Crew Truck Alpine Bundle Type S S-W12D2 Dual 12" Rhino Coated Sub Box Enclosure with Harmony HA-A800.1 Amplifier & 4GA Amp Kit - Walmart.com