Product Review

Alpine S-W10D4 S-Series 10" Subwoofer with Dual 4-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. The subwoofers also have an improved power rating of up to 600W 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
65mm voice coil with high-temp 5-layer dvc winding on aluminum former
high-grade strontium ferrite magnets
8-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
15MM Xmax
64mm Xmech
600W RMS
4.7" mounting depth
10-9/16" Cutout Diameter
Power handling: 250-600W RMS
Sealed Enclosure range: .55-1.0 ft^3
Vented Enclosure Range: 1.0-1.5 ft^3
Vented tuning range: 32-37Hz