This is a 4x4 matrix PA solution powered by MP912. MP912 is 4x4 matrix mixer amplifier with multiple audio inputs and remote paging function. The MP912 supports both 4-16Ω and 70V/100V speaker output. The 70V/100V output power can be used in long distance transmission, with the loudspeakers placed in appointed places like reception hall, workshops, warehouse, outside of the factory, etc. It can be applied in small-medium places like supermarkets, hotels, training centers etc., where public address and background music is needed.