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

Showing 4 responses by gdhal

@oldschool1

The Torus TOT MAX you bought is certainly a nice power isolation transformer. Thing is though, in the case of hum, that can very well be caused by DC on the line, and I don’t believe the Torus has a filter for that. For another $120 you might as well get an Emotiva CMX-2.
https://emotiva.com/products/accessories/cmx-2

I have one. It does work and even if it doesn’t in your particular case, it cant hurt. So essentially what I’m suggesting is use both the Torus and CMX-2. Torus plugged into CMX-2 of course.

wolf_garcia recommended a PS Audio Humbuster III. Same concept/functionality. That too would be good if you can find one, but is likely more expensive than the Emotiva.


Wow, I thought it was bad hearing hum from my Klipsch speakers from 12 feet. I'd be pissed if I could hear the actual transformers! I have an Emotive CMX-2 ($127 w/tax) coming tomorrow. I'll report on its efficacy.

If the cause of the hum is DC on the line, it certainly should work. It can't hurt in any case, unless one considers the two blue status indicators to be "active" and thus draw some minuscule amount of current.