... .2)Transformer isolated 240V,110V,70Vand 4-16Ohms speaker outputs.3)Muting function.4)Infividual volume control and master Volum control ... Ω 1V(0dBv)InputsMIC1,2/600Ω,2.0mV(-54dBV,)UnbalancedAUX1,2,3,4/10KΩ/250mV(-10dBV,\),unbalancedFrequency response110Hz-16kHzDistortionLess than 0.1 ... /50-60HzPower consumption700WDimensions(W*H*D)400*130*480mmGross weight36KG BJ-550 Broadcast Amplifier