Features: Power Peak, 600 Watts; RMS Power, 300 WattsCone Material, Metallic INJECTION; Magnet Structure, 80 ozVoice Coil Size, 2-InchEfficiency 1 Watt/1 Meter, 96dB; Frequency Response, 22Hz-2kHz; Impedance, 4 ohmMounting Depth, 6-InchProduct Description15-Inch SubwooferAverage rating: 5.0Price: $31.07Order now! Boss CH15 15-Inch Subwoofer