Slight hum in my amp. Is this normal?


I have an Anthem A5 and when I turn it on there is a slight "hum" if you put your ear close to it. From 3 feet away it’s unnoticeable. It's in the amp, not in the speakers.
Is this normal?
oldschool1
Just some transformer hum not unusual. Is the amp new or new to you? Or if you've had it a while is this noise new?
I would not say it is "normal" but it is pretty common.  Both my Acurus amps emit a slight hum that is only audible at close distances.  Most likely transformer hum(vibrations) in the majority of cases.

Bill
Having spoken to a couple of manufacturers about their amps it seems that the use of low or zero negative feedback can leave an amp vulnerable to slight hum. 
Use a balanced power source and it'll go away.  A Furman, Euqitec, Tourous etc.  


Good Listening

Peter