Fusion Marine 10" Subwoofer MS-SW10Increase the bass level of your music, or improve all-around sound quality by incorporating a marine subwoofer into your audio system. Installing a Fusion FM-402 amplifier is recommended to drive the 10" Subwoofer.Specifications:Efficiency: 88dBFrequency Response: 30Hz-2kHzMagnet Structure: 60 OzPower Handling: 400W (Max)Free Space Resonance Impedance: 4 OhmsMounting Depth: 115mmVoice Coil: 2" Til WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.