We are manufacturer, professional loudspeakers 1,200W, 8ohm lats power 2,peak power 300W 3, 43HZ--20KHZ(+_3dB) 4, As KTV Frequency response43HZ---20KHZ(+_3dB)subwoofer quantityLF 1*10''; HF2*3'' HF1*1''Impedance8ΩLast power200WPeak power300WSensitivity84dBDimensions(W*L*H)510*286*298mm SK series as for KTV loudspeakers.within automatic pull/push technical. all passed put through the serious test. ...