MA mixing amplifiers for rack mount or stand alone. It is a widely used mixing amplifier designed for different applications for public address and paging systems, useful for background music systems. Universal structure of the units, audio signal mixing possibilities, various inputs and outputs have wide application in simple installations. No need of professional installation assistance. Shop, bar or restaurant personnel can manage the installation of these mixing amplifiers by itself. Can be used as a component of voice evacuation or public address system. Line, microphone inputs, phantom power supply, different connectors, telephone line connection expands the fields of application of these high quality mixing amplifiers.