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2) Alpine SWR-1542D 15" 4000W Competition Car Subwoofers+Vented Sub Enclosure - Walmart.com
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LAB SlapBox™ 3.50 ft^3 Ported MDF Enclosure Box for Single Alpine 15" Type-S Subwoofer
Best Buy: Alpine Type-S 15" Dual-Voice-Coil 8-Ohm Subwoofer Black SWS-15D4
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Ported (Recessed) Sub Box Enclosure for 1 15" Alpine Type-R SWR Subwoofer -32 hz | eBay
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Best Buy: Alpine 12" Dual-Voice-Coil 4-Ohm Subwoofer SWR-1242D
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SWS-15D4 - Alpine 15" Dual 4-Ohm 500W RMS Type-S Car Subwoofer
2) Alpine SWS-15D2 15" 3000 Watt Car Subwoofers + Vented Sub Enclosure Box | Audio Savings
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SWR-1542D - Alpine 15" Type-R 2000 Watt Dual 4-Ohm Subwoofer
Alpine Type-S SWS-15D2 1500W Peak 15" Type-S Series Dual 2-Ohm High Performance Subwoofer
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Alpine 15 Inch Car Subwoofers for sale | eBay
