Our multi-use 20 watt RMS AC/DC amplifier can be used as a 12V DC mobile or use 117/220V AC and 220/240V AC with 50/60 Hz. It features two microphone inputs that accept 1/4 inch phone plugs, two auxiliary inputs and tone control. It handles up to 60 watt music power or 20 watt RMS @ 5% THD. It has an output impedance of 4, 8, or 16 ohms with 70 and 25 volt lines. The input for microphone one is (LO-Z) 2mV/600 ohm. The input for microphone two (HI-Z) is 2mV/50k ohm. The input for auxiliary one is 200mV/100k ohm. The input for auxiliary two is 200mV/100k ohm.