Alpine S2-W8D4 S2-Series SubwoofersAlpine S2 W8D4 S2 Series Subwoofers Elevate your audio experience with the Alpine S2 W8D4 8" subwoofer, featuring dual 4 ohm voice coils for exceptional bass performance. It includes a carbon fiber polypropylene cone with HAMR rubber surround. The subwoofer delivers a frequency response range of 35 215 Hz, handles 300 watts RMS (150 watts per coil), and has a peak power handling of 900 watts. With a sensitivity of 82. 7 dB and a top mount depth of 3.