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Alpine Type-R SWR-12D4 12" 3000w DVC 4-Ohm Car Subwoofer + Single Sealed Sub Box | Audio Savings
Alpine 10” Type-R Thin Powered Sealed Bass Package Includes one Alpine SWR-T10 10” thin subwoofer, one R-A75M amplifier, and sealed enclosure
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Building a Ported Box for a 12" Alpine Type R - YouTube
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Alpine R-Series R2-W12D2 12 Inch Dual 2-Ohm Voice Coils Subwoofer with 750W RMS
Amazon.com: Alpine R-SB12V Pre-Loaded R-Series 12-inch Linkable Subwoofer Enclosure : Electronics
Alpine Type-R R2-W12D4 12" 750w RMS Car Audio Subwoofer+Vented Sub Box Enclosure - Rockville Audio
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2) Alpine Type-R R2-W12D2 12" 750w Subwoofers+Vented Box+Mono Amplifier+Amp Kit - Rockville Audio
2 Alpine Type R R-W12D4 12" Sub up Port Back Subwoofer Box Plans | CustomLowz
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Alpine R-SB12V Halo Series 12" linkable ported subwoofer enclosure at Crutchfield
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Universal Car Stereo Slotted S Port Single 10" Alpine Next-Generation R-Series R2-W10D4 Sub Box Enclosure - Final 2 Ohm | ALPINE-PACK343A
Alpine Halo R2-Series Dual 12" Voice Coil 4-Ohm Loaded Subwoofer Enclosure Black R2-SB12V - Best Buy
LAB SlapBox™ 2.25 ft^3 Ported MDF Enclosure Box for Single Alpine 12" R-
Alpine SBR-S12D4 Type-R 12" Subwoofer Enclosure - Signature Car Sound
