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Alpine S-Series 12" Dual-Voice-Coil 4-ohm Subwoofer Black S-W12D4 - Best Buy
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Alpine Ready to use Bass Reflex Subwoofer Tube, 12 inch (30cm), 1000w peak power handling, ready-to-use bass reflex sub woofer tub | SWT-12S4 Buy, Best Price. Global Shipping.
Alpine SWR-1222D Type-R 12" subwoofer with dual 2-ohm voice coils at Crutchfield
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Amazon.com: Alpine Type R 12 Inch 2250 Watt Max 4 Ohm Round Car Audio Subwoofer %7C R%2DW12D4 : Electronics
Alpine S-W12D4 | 600W RMS 12" Type-S Series Dual 4 Ohm Car Subwoofer
2) Alpine Type-R R2-W12D2 12" 750w Subwoofers+Vented Box+Mono Amplifier+Amp Kit - Rockville Audio
Alpine SWA-12S4 BassLine Series 12" 4-ohm subwoofer at Crutchfield
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Alpine R2-SB12V 12" R-Series Halo Loaded Sub Enclosure w/ Alpine S-A60M S-Series Mono Amplifier 600W RMS & Wiring Kit - Creative Audio
Alpine W12S4 | 750 Watt 12" Single 4-ohm Car Subwoofer
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Best Buy: Alpine Type-E 12" Single-Voice-Coil 4-Ohm Subwoofers (Each) SWE-12S4
