Alpine R2-SB10V 10" Alpine Halo R2-Series Preloaded Subwoofer Enclosure with ProLink™ Car Speakers & Amplifiers Movement around the axes is

Movement around the axes is smoothed by ball-bearing units which remove all unwanted vibration

and a durable

With 10x magnification an extra-large field of view and waterproof housing

the front volume circuit of the AI-303 is designed not to pass the music signal directly

Alpine R2-SB10V 10" Alpine Halo R2-Series Preloaded Subwoofer Enclosure with ProLink™ Car Speakers & Amplifiers Movement around the axes isThe next generation of sound performance is here with the new R Series Halo Preloaded Subwoofers featuring the new R Series R2 subwoofers for more accurate and authoritative bass. The new R2 Series subwoofers now feature larger, double stacked magnets that contribute more motor force for deeper bass and tighter bass control compared to the previous generation. ProLink is unique to Alpine and allows you to link two R2 SB10V enclosures together using an