PowerBass XL-1040SS Single 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 Gun Metal 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 • Single 4 ohm voice coil • New Polycarbonate Glass Fiber Basket • Marine Grade 10" Subwoofer • Black powder-coated Aluminum grill included • Injection Molded UV-Treated Black 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: 4-ohm • BL: 13.69 • Inputs: Single 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: 5.16 in • Xmax: 9.5 mm • Spl: 85 dB • No: 0.20% • Qts: 0.46 • Qes: 0.50 • Qms: 6.24 • Mms: 137.28 g • Cms: 188 uM/N • Vas: 35.04 Ltr • SD: 363.05 sqCM • Fs: 31.3 Hz • Test Impedance: 3.51 ohm • VC Impedance: 4-ohms • Size: 10" • Sensitivity: 85 dB • Frequency Response: 35 Hz - 500 Hz • Voice Coil Size: 2" • Power Handling (RMS/Peak): 200 / 400 watts