The 180MA mixer/amplifier from Crown Audio offers terrific sound quality and reliability, ideal for paging and background music in offices, schools, hospitals, retail stores, and other similar venues. It is an 80W unit designed for single-zone systems, and offers 4 ohm, 70 volt, and 100 volt outputs to meet your needs. It also features protection circuitry to prevent against damage from overheating, overloads, or short circuits.