Cerwin-Vega HS124D Hed Dvc Shallow Subwoofer (12", 4ohm) Dual Voice Coil ; 500W MAX / 250W RMS Power Handling Stamped-steel Slim-mount Frame With Encapsulated Motor Vented Motor Structure For Optimal Thermal Heat Dissipation Polycotton Spider With Spaced, Woven-in Tinsel Wires Oversized Parabolic Dust cap For Extreme Rigidity