PowerBass XL-1240MF Dual 4-Ohm 12" Marine Subwoofer What better way to enjoy your day being out on the water in your boat is listening to your favorite music as well? The XL Marine Grade woofers feature UV inhibited Polycarbonate Glass Fiber Basket, UV Inhibited Poly Woofer Cone, and Marine Grade Spider that deliver the amazing sonic bass reproduction on the water. Sit back and relax knowing that you have put your music in the engineering hands of PowerBass. Features - New PBX dust cap Dual 4 ohm voice coils New Polycarbonate Glass Fiber Basket Marine Grade 12" Subwoofer White powder coated aluminum grill included Injection Molded UV-Treated White Polypropylene Cone TPO Thermoplastic Polyurethane Surround 2.0" KSV Voice Coil Former 120 oz. Motor Structure Insulated Tinsel Leads Marine Grade Spider 250 Watts RMS/500 Watts Max Designed for FREE AIR applications and Sealed Enclosures Specifications - Nominal Impedance: 4-ohm BL: 14.32 Inputs: Single Coil Subwoofer Frequency Range: 36 Hz - 500 Hz Voice Coil Size: 2 in Material: Polypropylene Magnet Size: 140 oz Sensitivity (1W / 1M): 87.41 dB Motor Structure: 140 oz Cutout Diameter: 11 in Mounting Depth: 5.875 in Xmax: 7.9 mm Spl: 87 dB No: 0.28% Qts: 0.61 Qes: 0.69 Qms: 5.33 Mms: 172.15 g Cms: 101 uM/N Vas: 37.35Ltr SD: 510.71 sqCM Fs: 38.1 Hz Test Impedance: 3.46 ohm VC Impedance: 4-ohms Size: 12" Sensitivity: 87 dB Frequency Response: 36 Hz - 500 Hz Voice Coil Size: 2" Power Handling (RMS/Peak): 250 / 500 watts