Drivers :HF 25mm, Mid 75mm parasitic grafted dome, LF 150mmFrequency Response -6dB :60Hz - 20kHzMatched Response±0.5dBDispersion :±80° Coherent Horizontal±10° Coherent VerticalMax SPL :108dBCrossover Frequency :2.8kHzInput Connector :Bi-wire postsRecommended Amplifier Power (see ATC SIA2-150) :50-300 WattsCabinet Dimensions(HxWxD):440x239x333mmWeight :22.7kg