The 4XD300 is controlled and monitored by the Variodyn D1 module’s DOM4-8 or DOM4-24 (Digital Output Module). It comes with a cooling unit socket located on its rear side for the mains connection and
HN-A500I is a high efficient 500W Power/Booster amplifier provides audio signal amplification for public address and voice alarm system, It is reliable, efficient and light in weight.