Tracking down hum in several amplifiers in a home studio?



Asked by: Connie Miller

How do I get rid of the humming sound on my amp?





How to find and fix hum in 3 easy steps

  1. Turn the volume control up and down. Does the hum in your speakers go up and down with volume? …
  2. Select different inputs. Does the hum go away? …
  3. Disconnect all inputs. Remove the cables connecting the receiver, power amplifier, or device powering your speakers.


How do I get rid of ground loop hum?

The ground loop can be eliminated in one of two ways:

  1. Remove one of the ground paths, thus converting the system to a single point ground.
  2. Isolate one of the ground paths with an isolation transformer, common mode choke, optical coupler, balanced circuitry, or frequency selective grounding.


What causes hum in audio amplifier?





More often than not, when your amp is making a humming sound, it’s caused by dirty power, a bad ground connection, or fluorescent lighting. Below are a few things to consider when dealing with this pesky hum.

Is it normal for amps to hum?

Note: it’s normal for an amp to hum when a lead is plugged in but not plugged into a guitar. So if you have your lead lying on the ground while plugged into your amp, don’t stress if you hear noise.

How do you ground an amp at home?

How to Ground a Stereo Receiver

  1. Choose an adequate ground. The household metal that attaches directly into the ground is typically a cold water pipe. …
  2. Cut ground wire to adequate length. …
  3. Strip both ends of the wire. …
  4. Attach wire to receiver. …
  5. Attach wire to best grounding source. …
  6. Test the system.


How do I get rid of 60hz hum?


And well together you plug one of the two devices into it and it will dramatically reduce the 60 Hertz hum.



Will a power conditioner get rid of hum?

A power conditioner will filter the mains signal to remove any radio-frequency interference plus any incoming spikes and other intermittent noises riding piggyback on the mains signal from the outside world.

How do I stop my power supply humming?

Check the case mounting screws



If your PSU isn’t secured to the case, the rotating mass of the built-in fan can cause vibrations that are loud enough to be heard. Fixing this is a matter of adding missing screws and/or tightening the loose ones.

How do you find a ground loop?

To test for ground loop:



  1. Set your volt meter to the most sensitive AC setting.
  2. Disconnect the camera you want to test.
  3. Place one contact on any exposed metal of the chassis. …
  4. Place the other contact on the outside of the connector on the coax from the camera.
  5. Any value above 0 indicates a ground loop.

How do you get rid of ground noise in a circuit?

You can also break the ground loop by using a power isolation transformer between the power line and the PC, or quality signal transformers on the signal lines. The downside of this is that good isolation and signal transformers are costly and not widely available.

What does ground loop sound like?

Ground loops can appear when there are two or more devices connected to a common ground and can sound like a low frequency hum, similar to touching the end of an instrument cable connected an amplifier. This typically happens when you are using a stereo guitar rig with two grounded amplifiers.