BOSS SE122DVC 12-Inch Metallic Injection Cone Dual Voice Coil Subwoofer Power Peak, 800 Watts; RMS Power, 400 Watts Cone Material, METALLIC INJECTION; Magnet Structure, 120 oz Voice Coil Size & Type, 2-Inch; Efficiency 1 Watt/1 Meter, 95dB Frequency Response, 28Hz-2kHz; Impedance, dual 4 ohm Mounting Depth, 6-11/16-Inch