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Universal Car Stereo Slotted S Port Single 10" Alpine Bundle Type R R-W10D4 Sub Box Enclosure with Harmony HA-A800.1 Amplifier & 4GA Amp Kit - Walmart.com
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Amazon.com: Alpine SWT-12S4 1000 Watt 12" Car Audio Bass Tube Subwoofer Bundle with Amplifier and Amp Kit : Electronics
Amazon.com: Universal Car Stereo Rearfire Sealed Single 12" Alpine S-W12D4 Type S Car Audio Subwoofer Custom Sub Box Enclosure Package New : Electronics
Alpine Halo R2-Series Dual 12" Voice Coil 4-Ohm Loaded Subwoofer Enclosure Black R2-SB12V - Best Buy
2) ALPINE SWR-1542D 4000W 15" CAR AUDIO SUBWOOFERS TYPE R WITH 4-OHM DVC SUBS | eBay
Alpine SWR-12D2 - 12 Inch Subwoofer - Car subwoofers - Custom Sounds & Tint
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Alpine R2-W12D4 12" 750w RMS Car Subwoofer Sub+(2) Stereo Bluetooth Speakers - Rockville Audio