Alpine S-W8D4 8 Inch S-Series Dual 4 Ohm Voice Coil High-Performance Subwoofers The S-W8D4 8" subwoofer can handle up to 300 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: 8" 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: 0.30 cubic feet (gross volume) Recommended Vented Box: 0.71 cubic foot Grille not included Power Handling: Max RMS Power Capacity: 300W RMS Peak Power Capacity: 900W Peak Power Frequency response: 34-200 Hz Top-mount depth: 3-3/4"