FREE 2-day Shipping: Great bass in less space To create great bass, you need the best in materials and engineering. Alpine's S-Series subwoofers apply

Alpine S-W8D4 S-Series 8" Subwoofer with Dual 2-Ohm Voice coils. The new S-Series subwoofers use a new design that’s almost 1-inch shallower than their predecessors, thereby making all the models good candidates for systems with limited space. These subwoofers also have an improved power rating of up to 300W RMS power handling. Features: High Amplitude Multi-Roll Surround High Strength Steel Frame Perimeter venting with airflow management system High-excursion underhung voice coil configuration Compound radius curve extended pole geometry Airflow optimized dual flare pole vent 35mm voice coil with high-temp 5-layer dvc winding on aluminum former high-grade strontium ferrite magnets 10-AWG push terminals with voice coil configuration jumpers Progressiver spider with reinforced tinsel leads Concealed mount gasket Reinforced parabolic cone structure with pulp/Kevlar con & PP/Mica/Talc Dustcap 13MM Xmax 40mm Xmech 300W RMS 3.75" mounting depth 6-7/8" Cutout Diameter Power handling: 150-300W RMS Sealed Enclosure range: .15-.5 ft^3 Vented Enclosure Range: .35-.7 ft^3 Vented tuning range: 36-40Hz