All of a sudden I noticed that one of my 2 Audiophonics MPA-M400ET Purifi amps is emitting a quite loud hum/buzz from the unit when it's switched on. The other one is dead quiet.
I tried several power cables, put the amp in different outlets, in different places in the house, but the hum/buzz remains. Also, there's no difference if a source or speaker is connected. The hum/buzz is constant.
What could be the cause? And more importantly, should I consider this to be normal and/or acceptable or should I contact Audiophonics for a repair?
I tried several power cables, put the amp in different outlets, in different places in the house, but the hum/buzz remains. Also, there's no difference if a source or speaker is connected. The hum/buzz is constant.
What could be the cause? And more importantly, should I consider this to be normal and/or acceptable or should I contact Audiophonics for a repair?