Industrial amplifiers

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AWF120-HV 120 W RMS mixer amplifier, 4 kV insulation


AWF240-HV 240 W RMS mixer amplifier, 4 kV insulation


AXF120-HV 120 W RMS booster unit, 4 kV insulation


AXF240-HV 240 W RMS booster unit, 4 kV insulation


The peculiarity of these amplifiers is that they are able to withstand high voltages between the mains power supply/loudspeaker outputs and the frame, even reaching up to 4 kV. This feature increases the safety of the system, preventing possible discharges on the mains or on the loudspeakers connections from passing along the audio chain thus causing serious damage or personal injury. This built-in amplifier has a standard format that enables it to be mounted also inside telephone type cabinets. The fact that it can be directly wall-mounted using the special backplate enables it to be used in all situations in which there is little room available. The input of the amplifier is electronically balanced. For special needs, for example in case of particularly long connecting lines or lines prone to interference, it is possible to isolate the input galvanically by means of an optional TM92 card equipped with a line transformer. Each amplifier is equipped with a diagnostics card able to provide a high number of additional functions (line impedance measurements, amplifier diagnostics, check of integrity of the loudspeaker line, volume control, selection of two inputs, failure-signalling relay control, possibility of including a  ‘LOW CUT’ filter, operation in the ‘LOW POWER’ energy-saving mode). In addition to all the operations and/or checks set locally by means of the micro-switches, it will also be possible to alter all the parameters via the TS485 serial interface. Models AXF120-HV and AXF240-HV have four inputs with RJ45 sockets on the lower panel: one input for a B711-G microphone station (BASE) and three auxiliary inputs (AUX1, AUX2 and AUX3). These inputs, which are electronically balanced, are switched to one another and have their own order of priority: the BASE input has priority over inputs AUX1/2/3, input AUX1 over AUX2/3 and input AUX2 over AUX3. On each of them, switching of the inputs takes place by means of a positive power supply from outside. There is a voltage on sockets AUX1/2/3 that is cut off in the event of failure of the amplifier or if it is switched off. This enables operation of the amplifier to be monitored from a remote station. There is a ‘busy’ signal on sockets AUX 2 and AUX 3 when the BASE input or the AUX 1 input are active.



• SPK impedance of loudspeaker line out of spec
• AMP amplifier not working properly
• OVL overloading of loudspeaker line
• HOT thermal overload