Alpine 12” Type X-Series Ported Bass Package Includes one Alpine X-W12D4 12” subwoofer, and 2.00 ft³ optimized ported enclosure
Alpine SWX-1043D Type-X 10" subwoofer with dual 4-ohm voice coils at Crutchfield
Alpine SWX-1243D Type-X 12 Subwoofer
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Alpine Type X SWX-10 10" Sub and Port Back Subwoofer Box Plans | CustomLowz
Custom Ported Sub Box Enclosure for 1 12" Alpine Type X Subwoofer ~ X-Series | eBay
Amazon.com: Alpine (2) X-W10D4 Car Audio Type X Series Sub 1800W Peak 10" Subwoofer Bundle with Harmony HA-A1500.1 Amplifier & Amp Kit : Electronics
Alpine SWX-1043D Type-X 10" DVC Subwoofer - Signature Car Sound
LAB SlapBox™ 1.25 ft^3 Ported MDF Enclosure Box for Single Alpine 10" X-
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