Alpine SWR-8D2 8" Car Subwoofer SWR-8D2 - Alpine 8" Dual 2-Ohm Type-R Series Subwoofer Kevlar reinforced pulp cone with HAMR Santoprene rubber surround Power handling: 150-350 watts RMS (175 watts per coil) | Peak power: 1,000 watts Sensitivity: 83.5 dB Top-mount depth: 4-1/2"