... auxiliary inputs,and one AUX out for line.2)Transformer isolated 240V,110V,70Vand 4-16Ohms speaker ... 110V.240VAUX output600Ω 1V(0dBv)InputsMIC1,2/600Ω,2.0mV(-54dBV,)UnbalancedAUX1,2,3,4/10KΩ/250mV(-10dBV,\),unbalancedFrequency ... %@ 1kHz,1/3 rated powerSignal to noise ratioMicrophone1,2: 66dBAUX1,2,3,4: 70dBToneBass:±10dB at 100Hz Treble: ... *H*D)400*130*480mmGross weight36KG BJ-550 Broadcast Amplifier