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Alpine Next Generation S-Series 10" Dual-Voice Coil 4-Ohm Subwoofer Black S2-W10D4 - Best Buy
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Best Buy: Alpine Type-S 10" Dual Voice Coil 2-Ohm Subwoofer Black SWS-10D2
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Universal Car Stereo Slotted S Port Single 10" Alpine Type S S-W10D4 Sub Box Enclosure with S2-A60M Amplifier & 4GA Amp Kit | ALPINE-PACK11A-AMP