Sensitivity (2.83V @ 1m) 90dB Recommended amplifier power 25-100W Peak SPL 97dB Nominal impedance 8Ω Compatible Minimum impedance 3.6Ω Frequency response (+/-3dB) 65Hz ~ 20kHz Bass extension (-6dB) 60Hz Crossover frequency 300Hz&3.8kHz Cabinet Volume (in litres) 17.2L Height (on plinth) (174+25)mm Width 520mm Depth (with terminals) (290+30)mm Carton size 620*400*310mm Net weight 14kg/pcs Gross weight 15.2kg/ctn