Rockford Fosgate M2 M212S4B Marine Grade 12-Inch  500 Watt Subwoofer Black True Marine Grade compliance|UV stable Centrex injection molded plastic parts|Proprietary corrosion resistant gold plated bare-wire input push-type terminals|Injection molded mineral filled parabolic polypropylene cone body with UV inhibitors|UV and Salt-Fog resistant TPE (Thermo-Plastic Elastomer) surround|16 gauge corrosion resistant removable Stainless Steel grille cover insert|Internal magnetic shielding for reduced electromagnetic interference potential|Fully insulated ultra-flexible lead wire|High temperature Kapton former with polyimide insulated copper wire|Moisture, tear and fatigue resistant aramid fiber spider|Linear, high excursion matched motor magnetics and suspension design|Removable trim ring|1 Year|Standard Warranty 12-inch, 4-ohm marine subwoofer with 600 watts maximum power handling (300 watts RMS) Injection molded mineral filled parabolic polypropylene cone Internal magnetic shielding for reduced electromagnetic interference potential Corrosion, moisture, and UV resistant for true marine-grade compliance 35Hz - 250Hz frequency response