150 Watts RMS into 4 Ohms internal power amplifier.9 channels with 8 low noise microphone and 1 stereo inputs.2-band EQ, reverb and gain control on each microphone channels.Line Out for connection to external amplifiers.RF interference protection on all inputs.Dimensions (HxWxD): 8'' (203mm) x 20.375'' (517mm) x 12.125'' (308mmWeight: 27.5 lbs (12.5 kg)