Can moving wire location at circuit breaker reduce hum?

Thanks, Erik.  I’ll try that.

Thanks, everyone, for your input.  I’ll pick up the tester on Amazon.

I have shut off the circuit that goes into my music room and went around testing the outlets all around it to see which ones are dead.  I’m guessing the receptacles would be in the same general area so I didn’t go to every receptacle in my house.

I’ve then disconnected everything except the amp and it’ll still hum.  I’ve had numerous electronic components hum in this particular room.  In the room just next door, dead quiet.  
 

Shut everything else off at the circuit breaker and still hum.  

I guess I’ll keep on living with it until I get an electrician to install a dedicated line.

Hope that will do the trick.

Thank you so every much, everyone!

Is a DC blocker like the Hum X device?  If so I've got two of those and they really don't do much at all.

I'll trying tightening the screws and maybe moving the line that goes into my music room but beyond that it seems a bit scary.

On this particular line in my music room I've got other things plugged in and in the other room there are two receptacles connected to this line where a TV, amo and Amazon Firestick is plugged in.

But I get the buzz even when I unplug all unneccessary items.  I have the source components plugged into a PurePower 2000 which is connected to a different receptacle in the same circuit.  The amp goes into a RSA Maxim power conditioner but even if I plug strait i to the wall the buzz remains.

What's really weird is that not all amps will buzz.  Maybe I should have mentioned this sooner.  But more electronics have buzzed in this room.

I've got tubed headamps hum/buz, preamps emit a buzzing and even a CD transport hums.  All these components taken into the room next door and they're all dead silent.

It gets a bit frustrating at times.

I've got a cheater plug laying around somewhere so I'll try that, as well.

Cheers, all.

Mamoru

The current culprit is a Marsh amp.  Lights but no dimmer switch.  The house was build in 2001 but I upgraded the receptacle with one of the audiophile-approved  Randy’s about a year back.

I’ve always had a problem with this room and initially thought all my gear was going bad until one day, on a whim, tried a component in another room.

One of my daughter’s friends is an electrician.  I’ll probably have him look into it.

Thanks, all.

Cheers,

Mamoru