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Alpine 12” Type X-Series Ported Bass Package Includes one Alpine X-W12D4 12” subwoofer, and 2.00 ft³ optimized ported enclosure
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Alpine Type-X 10" - YouTube
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Amazon.com: Alpine X-W12D4 12-Inch Dual 4 Ohm Subwoofer : Electronics
2) ALPINE X-W10D4 10" 900w RMS Car Audio Subwoofers DVC Dual-4ohm X-S – absoluteusa
X-W12D4 - Subwoofer
Alpine SWX-1243D Type-X 12 Subwoofer
