Alpine’s RSB-W12D4 is a slot ported box design featuring the all-new 12″ R-Series Subwoofer which has gained significant engineering refinements that substantially improve the sonic performance of their predecessors. Alpine’s efforts were concentrated on re-engineering the motor and circuit design, crafting a performance sub that offers exceptional sound and resolution, well exceeding it’s peers.
This stylish enclosure is perfectly matched to the subwoofer for optimum output and sound quality. Built to play low and loud, the RSB-W12D4 delivers powerful, clean bass with exceptional accuracy and deeper bass excursion. Painstaking engineering, coupled with decades of expertise in high-end audio design, Alpine’s all-new R-Series Subwoofer enclosure continues it’s unrivalled reputation in benchmark performance and sound quality.