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2) Alpine Type-R R2-W12D2 12" 750w RMS Car Subwoofers+Vented Sub Box Enclosure - Rockville Audio
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5 Best Box for Alpine Type R 12 (Reviews) in 2022
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Box build for 2-12" Alpine Type-R subs - YouTube
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Universal Car Stereo Paintable Ported 10" Alpine R-W10D4 Type R Car Audio Subwoofer Custom Sub Box Enclosure Package New : Electronics
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LAB SlapBox™ 2.25 ft^3 Ported MDF Enclosure Box for Single Alpine 12" Type-R Subwoofer
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