The Ultimate in Deep Bass Deep Bass is achieved by focusing the speakers output to a lower frequency range than most conventional subwoofers. A large 61.4 oz. magnet helps produce these powerful low frequencies. Durable Design Heat dissipation and power handling A newly incorporated 6- layer copper voice coil with aluminum former, improves heat resistance. The air convection generated from the vibration of the diaphragm is effectively used to cool the voice coil, contributing to the speakers power handling and ability to dissipate heat. General Features ELECTRICAL Peak Input Power (W): 1300W RMS Power (W): 300W Impedance (Ω): 4 Sensitivity (dB at 1m): 82 Frequency Response (Hz): 44-300 MOUNTED SPEAKER Size: 10” (250mm) Diaphragm: PP Cone Surround: Foam Basket: Steel Magnet: Ferrite DIMENSION Width: 10-13/16" (275mm) Height: 10-13/16" (275mm) Cut-out Diameter: 9-1/16" (230mm) Mounting Depth: 5-1/4" (133mm) WEIGHT Net Weight: 10.14lbs (4.6kg) Weight of Magnet: 61.4oz (1740g)