Descriptionfrequency 20Hz-20KHz 3db Working volt AC220V 50Hz Signal-to-noise >95db model Load impedance(4) Load impedance(8) Bridging load impedance(8) SA-2500 CH1/2 2*550W 2*350W 1300W CH3/4 2*550W 2*350W 1300W Outside measurement(mm) 495*550*135 weight(KG) 29