The MA-103 is a compact mixing amplifier that requires BGM and voice amplification in lecture halls, training centers,restaurants, cafes, etc. It can be used conveniently in a small space due to adaptation of high efficiency digital amplifier circuit. It has high reliability, low weight and low heat generation, also can use MIC, LINE input according to any type of application. It is a device that implements various additional features such as tone control, TEL IN and priority function in a compact size.