The AC 08 Amplifier Supervisory Unit provides real-time monitoring and surveilance for one of the most critical component in a public address system, the power amplifiers. The unit monitors up to 8 units of power amplifiers for faults with automatic changeover to stand-by amplifier. Visual indicators provide status monitoring, together with an aural indicator for fault. The unit is capable of interfacing with other equipments such as eX 800 series e-Matrix System via RS 485 for remote monitoring, fault event logging and fault notifications.