Rockford Fosgate PM212S4X

Features:

• 12" Single 4-ohm Punch M2 Marine Subwoofer
• Power Handling:
• Peak: 600 watts
• RMS: 300 watts
• CEA-2031 Compliant Subwoofer
• Klippel Verified Subwoofer
• Meets or exceeds ASTM test standards for Marine/Outdoor use
• 100% UV stable Centrex® injection molded plastic parts
• UV and Salt-Fog resistant TPE (Thermo-Plastic Elastomer) surround
• Injection molded mineral filled polypropylene cone body with UV inhibitors
• 18 gauge corrosion resistant removable Stainless Steel grille cover insert
• Ultra-flexible fully insulated silicone lead wire
• 2.0" 4-layer aluminum voice coil diameter
• Proprietary corrosion resistant spring loaded push terminals
• Moisture, tear and fatigue resistant Aramid fiber spider
• Linear, high excursion matched motor magnetics and suspension design
• VAST Surround, provides up to a 25% more cone area
• Protected against Dust, UV, Water, Corrosion
• Dual 8 AWG compression speaker terminals
• FlexFit slot mounted frame pattern basket
• Anodized aluminum voice coil former
• Internal magnetic shielding
• User-removable trim ring/grille
• Top-mount depth: 6.60"
• Cutout Diameter: 10.9"
• Frequency Response: 30 - 250 Hz
• Sensitivity: 87.0 dB
• Xmax: 12 mm
• Resonance Frequency (Fs): 25.5 Hz
• Optimum Sealed Enclosure: 1.0 ft² (28.33L)
• Optimum Vented Enclosure: 1.5 ft² (42.50L)
• Also Optimized for Infinite Baffle (Free Air) Applications

Specifications:

• Subwoofer Size: 12"
• Subwoofer Design: Round / Circle
• Main Cone Color: Black
• Voice Coil(s): Single
• Impedance (Per Voice Coil): 4 ohms
• Peak Power Handling: 600 watts
• RMS Power Handling: 300 watts
• Woofer Surround: Thermo-Plastic Elastomer
• Woofer Composition: Mineral-Filled Polypropylene 
• Minimum Sealed Box Volume: 0.70 cubic feet
• Maximum Sealed Box Volume: 1.80 cubic feet
• Minimum Ported Box Volume: 1.50 cubic feet
• Maximum Ported Box Volume: 1.50 cubic feet
• Sensitivity: 87 dB
• Xmax (millimeters): 12 mm
• Top-Mount Depth: 6.60"
• Shallow Mount Installation: No
• Cutout Diameter: 10.90"
• Recommended Enclosure Type: Ported / Vented, Sealed
• Subwoofer Grille: Yes - Included
• Re-Cone Kit Available: No
• Amplified or Non-Amplified: Non-Amplified