MA30 – compact size, low power mixing amplifiers are suitable for small public address systems. There are designed three microphone inputs with XLR and Jack connectors and three line inputs via RCA. Screw terminal in the output audio line. A type of your audio line there is no matter; there are designed 4 , 8 ,70 V sure, you will adapt this device without any sound systems where just several speakers tiques, or boats and travel bus are just several For special installations, external 12 V power input is provided.