Features18" ferrite subwoofer provides 1000Wrms (AES standard) power handling and a frequency response of 30Hz-2500Hz4" high temperature Inside/Outside voice coil efficiently dissipates heat, preventing sensitivity loss through thermal compressionDouble suspension and a "multi-roll" surround provide exceptional linearity at extremes of cone excursionIntelligent heat management in both chassis and magnet assembly design further minimizes distortionLess than 10kg - very low weight for this product class