Hum in Power Amp (1 Viewer)

[Louisp]

What can cause a low level hum from speakers connected to an additional power amp?

 

[Elinor]

Bad caps in the amp.

Ground loop anywhere in the system.

Power cord parallel to speaker wire/amp interconnect.

 

[John Garcia]

Ground loop would be the first thing to check for. Start with your CATV/SAT cable connection. If that's not it, then I'd disconnect and reconnect each source to see if any of them stop the humming.

 

[Kevin. W]

If your ear has to be right next to the speaker too hear, its probably just the amps transformer.

Kevin

 

[alan halvorson]

Try plugging everything into one outlet. This eliminates differences in potential.

 

[John Garcia]

I had everything plugged into one outlet (via a Panamax 5100) and I still had ground loop hum from my CATV, so that is not always the case.

 

[JohnSmith]

What about humming from the amp itself? I have one amp that hums.

 

[Wayne A. Pflughaupt]

Alan was talking about a ground loop that can be caused when the gear is plugged into circuits on opposite phases.

Regards,
Wayne A. Pflughaupt

 

[Chu Gai]

Can you make out the tune?

 

[Karl_Luph]

I have a pro audiostereo soundcraftsman amp that has a hum(actually ,more of a buzz) in one of the channels. A signal can get amplified through it,but it's distorted with the buzz that gets louder as you turn the amp up. I figured it may be bad caps too. The other channel is great.

 

[Elinor]

Yeah, my main 3-channel amp buzzes/hums for the first 5 minutes of warmup. I'm figuring new caps are in its near future.

 

[Louisp]

Pardon my ignorance but what are "caps"?

 

[JeremyErwin]

Capacitors

 

[Louisp]

Thanks