Alpine S-W10D4 S-Series 10" Dual 4 Ohm Voice Coil High-Performance Subwoofers The S-W10D4 10" sub can handle up to 600 watts RMS, so you can drive it hard without any worries. The tough Kevlar treated cone stays rigid under pressure, while its rubber High Amplitude Multi-Roll (HAMR) surround enables maximum excursion for impressive performance. Its dual 4-ohm voice coils allow for extra wiring flexibility, which helps if you plan on adding another subwoofer down the line. Product Highlights: 10" subwoofer with dual 4-ohm voice coils Kevlar reinforced pulp cone with HAMR Santoprene rubber surround High Strength Custom Steel Frame Great complement to V-Power Amplifiers Recommended Sealed Box: 0.58 cubic feet (gross volume) Grille not included Power Handling: 600 watts RMS (300 watts per coil) Peak Power Capacity: 1800W Peak Power Frequency response: 28-200 Hz Top-mount depth: 4-11/16"