The 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. PRODUCT FEATURES: Unique ProLink Design – ProLink is unique to Alpine and allows you to link two R2-SB10V enclosures together using an optional KTX-H10 linking kit to create a dual subwoofer enclosure. Stand Out in the Crowd – Drawing inspiration from the sleek, tapered lines and clean silver finish of the Alpine Halo display, the R2-SB10V shares the same unique, curved edges outlined by a silver trim and a metallic front baffle for a matching system aesthetic. Improved Performance – The new R-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. General Specs: Size: 10” Weight: 42 lbs Dimensions: 16” x 12.68” x 14.5” Frequency Response: 26Hz - 200Hz Power Range: 300W - 750W RMS Power Handling: 750W RMS / 2250W Peak Magnet Weight: 123 oz Voice Coil Diameter: 65.5 mm (2.6”) Linear Excursion (Xmax): 20 mm T/S Parameters: Sensitivity (1W/1m): 82.3 dB DC Resistance (Re): 1.9Δ + 1.9Δ Free Air Resonance (Fs): 31 Hz Equivalent Stiffness: 18.2 L Mechanical Q (Qms): 7.07 Electrical Q (Qes): 0.5 Total Q (Qts): 0.47 Cone Area (Sd): 333 cm2 Linear Excursion (Xmax): 20 mm Mechanical Travel (Xmech): 70 mm