Subwoofer Specification : Size: 15 Inch Type: Subwoofer RMS Power: 220 Max Power: 450W Magnet: Ferrite Magnet Size in Oz: 40 Oz Impedance in Ohm: 4 Frequency Response: F0-3KHZ Sensitivity(1M/W): 91.0 DB Voice Coil Size: 2” Voice Coil Material: ASV Copper Voice Coil Cone Material: Foam Edge Paper Cone Mounting Depth: 140MM Frame Material: Iron Terminal Type: High Durable Steel Cardboard SPL: 91.0 DB Weight: 2.6kg Hole to hole Distance : F370-8-F6.5MM Package Include: 1x 15 Inch Subwoofer