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Alpine S-DB8V-TRK Halo Series 8" ported dual subwoofer enclosure with two 8" S-Series subwoofers at Crutchfield
Alpine SWE-1242 Type-E 12" 4-ohm subwoofer at Crutchfield
Amazon.com: Universal Car Stereo Rearfire Sealed Dual 12" Alpine S-W12D2 Type S Car Audio Subwoofers Custom Sub Box Enclosure Package New : Electronics
Alpine
Alpine Halo R2-Series Dual 10" Voice Coil 4-Ohm Loaded Subwoofer Enclosure Black R2-SB10V - Best Buy
2) Alpine Type-R R2-W12D4 12" 750w RMS Car Subwoofers+Vented Sub Box Enclosure - Rockville Audio
Alpine Subwoofer R-W10D4 | P.C. Richard & Son
Amazon.com: Universal Car Stereo Vented Port Single 10" Alpine S-W10D4 Type S Car Audio Subwoofer Custom Sub Box Enclosure Package New : Electronics
Single Sealed 10" Alpine S-W10D4 Car Audio Subwoofer Custom Sub Box En – absoluteusa
Alpine SWR-8D4 - CarAudioNow
Alpine R-Series R2-W10D4 10 Inch Dual 4-Ohm Voice Coils Subwoofer with 750W RMS
Alpine R-W12D4 12 inch 2250W Audio Subwoofer for sale online | eBay
Alpine SWS-1023D Type-S 10" subwoofer with dual 2-ohm voice coils at Crutchfield