amplifier output humm is it normal what is it

[boomtheroom]

HI
Just noticed A buzzing noise coming from my left speaker (not audible a foot or more away but now heard can never be unheard) its a perreaux r200i intergrated
is this normal to hear from an amp? volume doesn't effect it at all and have changed inputs.. unplugged everything so it just the amp and the speakers attached and have also
switched speakers and cables around. so definitely an amp issue

 

[fredoamigo]

If you are XLR try the RCA j had the same problem with my amp and it had a problem on the XLR circuit.

restorer-john​

certainly know the Perreaux

 

[Chrispy]

If only one channel exhibits the issue, yeah probably an amp issue. What particularly couldn't tell you, that sounds like it might be best to be put on a technician's bench for testing. If the amp is new/within warranty, then I'd contact the manufacturer for help. Not familiar with Perreaux myself, so not sure what expectations might be.

 

[radix]

All amps hum to some extent, but good ones should not be audible. My benchmark AHB2 is dead silent.

If it just started and you don't have any cable problems, it could be a component in the amp is wearing out. An asymmetric hum is also likely an indicator its the amp.

If you have a decent repair place, they might be able to diagnose and fix it.

 

[boomtheroom]

If you are XLR try the RCA j had the same problem with my amp and it had a problem on the XLR circuit.

restorer-john​

certainly know the Perreaux

nah not on xlr.. but does it with noting hooked up to the amp also , so not a input issue

 

[boomtheroom]

All amps hum to some extent, but good ones should not be audible. My benchmark AHB2 is dead silent.

If it just started and you don't have any cable problems, it could be a component in the amp is wearing out. An asymmetric hum is also likely an indicator its the amp.

If you have a decent repair place, they might be able to diagnose and fix it.

yah or maybe its time i get a ahb2

 

[boomtheroom]

If only one channel exhibits the issue, yeah probably an amp issue. What particularly couldn't tell you, that sounds like it might be best to be put on a technician's bench for testing. If the amp is new/within warranty, then I'd contact the manufacturer for help. Not familiar with Perreaux myself, so not sure what expectations might be.

Nah its 10 years old so maybe on its last legs....will totally have to die tho before the wife will allow a new one i reckon

 

[fredoamigo]

nah not on xlr.. but does it with noting hooked up to the amp also , so not a input issue

Are you sure that the cables are shielded and that they do not touch each other?

 

[ErVikingo]

Have you added any dimmers to house recently? LED’s?

 

[thecheapseats]

assuming it's not a high-pitched squealing xformer... if the amp chassis itself is making a hum, i.e., not thru the speakers at all - but from the physical chassis itself - have you tried phisically pressing on the external cabinet and bottom of the amp chassis in various places while it's powered-up - to see if it's a physical sympathetic vibration of the amp's case (maybe originating from the amp's xformer) - due to a loose mounting bolt, screw, or panel?...

had an older amp come back from a service repair which did this several years ago... tightened a few external case screws and the sound was gone...

 

[Chrispy]

Nah its 10 years old so maybe on its last legs....will totally have to die tho before the wife will allow a new one i reckon

Not a great plan, but if all you get with your marriage....oh welll

 

[boomtheroom]

Are you sure that the cables are shielded and that they do not touch each other?

makes noise with no cables or components connected

 

[boomtheroom]

assuming it's not a high-pitched squealing xformer... if the amp chassis itself is making a hum, i.e., not thru the speakers at all - but from the physical chassis itself - have you tried phisically pressing on the external cabinet and bottom of the amp chassis in various places while it's powered-up - to see if it's a physical sympathetic vibration of the amp's case (maybe originating from the amp's xformer) - due to a loose mounting bolt, screw, or panel?...

had an older amp come back from a service repair which did this several years ago... tightened a few external case screws and the sound was gone...

noise is coming from speakers not the amplifier

 

[LTig]

Could be the power supply. If it is dual mono the caps in the noisy channel might need to be replaced.

 

[HarmonicTHD]

Switch the channels on your amp. If the hum is then heard in the other speaker, something is broken in your amp and needs to fixed (or replaced).

 

[solderdude]

OP already did that.
It is safe to say something in the amp is (getting) defective, most likely a regulator or cap.
That is... if it wasn't there in the past but as this model is from around 2003 and the owner has had it for quite some time it stands to reason the hum in one channel would have been heard earlier.

Maybe the amp needs servicing (a bit soon though) and may well be worth it still.

 

[Verig]

OP already did that.
It is safe to say something in the amp is (getting) defective, most likely a regulator or cap.

I had a blown ground resistor which made some nasty sound. But doesn't matter, I agree, it needs to be serviced anyway.

 

[thecheapseats]

noise is coming from speakers not the amplifier

sorry - I misread you OP...