Module with speaker subzone outputs (16 / 8A+8B) with individual volume adjustment, to be inserted in digital audio matrix (4 slot). Two audio outputs with 0 dB sensitivity and priority control output (RJ45 connectors). Measure of the status of speakers line and amplifier. Independent audio level adjustment for each output. Volume controls, bass and treble, controlled through the frontal keyboard and/or PC. 16 subzone outputs ready to control volume controls with security paging option and possibility of operation as 8 subzones output A/B. Individual volume adjustment of music, for subzone. If paging amplifier fails, music amplifier can work as backup amplifier. Output contact to indicate failure in amplifier or loudspeakers line.