PowerBass XL-1040DMF Dual 4-Ohm 10" 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 White UV inhibited Polycarbonate Glass Fiber Basket, White 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 10" Subwoofer • White powder-coated Aluminum grill included • Injection Molded UV-Treated White Polypropylene Cone • TPO Thermoplastic Polyurethane Surround • 2.0" KSV Voice Coil Former • 140 oz. Motor Structure • Insulated Tinsel Leads • Marine Grade Spider • 200 Watts RMS/400 Watts Max • Designed for FREE AIR Applications and Sealed Enclosures Specifications - • Nominal Impedance: Dual 4-ohm • BL: 8.546 • Inputs: Dual Coil • Subwoofer Frequency Range: 35 Hz - 500 Hz • Voice Coil Size: 2 in • Material: Polypropylene • Magnet Size: 39 oz • Sensitivity (1W / 1M): 85.39 dB • Motor Structure: 39 oz • Cutout Diameter: 9 1/8 in • Mounting Depth: 5.375 in • Xmax: 7.9 mm • Spl: 84.5 dB • No: 0.171% • Qts: 0.546 • Qes: 0.612 • Qms: 7.208 • Mms: 136.6 g • Cms: 187 uM/N • Vas: 34.89 Ltr • SD: 363.1 sqCM • Fs: 31.5 Hz • Test Impedance: 1.65 ohm • VC Impedance: 4-ohms + 4-ohms • Size: 10" • Sensitivity: 85 dB • Frequency Response: 35 Hz - 500 Hz • Voice Coil Size: 2" • Power Handling (RMS/Peak): 200 / 400 watts