Subwoofer Specification :Size: 15 InchType: SubwooferRMS Power: 220Max Power: 450WMagnet: FerriteMagnet Size in Oz: 40 OzImpedance in Ohm: 4Frequency Response: F0-3KHZSensitivity(1M/W): 91.0 DBVoice Coil Size: 2”Voice Coil Material: Asv Copper Voice CoilCone Material: Foam Edge Paper ConeMounting Depth: 140MMFrame Material: IronTerminal Type: High Durable Steel CardboardSPL: 91.0 DBWeight: 2.6kgHole to hole Distance : F370-8-F6.5MMPackage Include:1x 15 Inch Subwoofer