Tips to Fix HUM in 3 Easy Steps

Having a pleasant audiovisual experience is something most people look forward to when buying music systems. A music system gives a surround sound effect, making the whole viewing experience a lot more enjoyable. But there is one thing that is annoying about it. Speakers tend to make a humming sound when they are switched on. This humming sound can get intense or linger on, making it annoying for the listener.

There are very few audio systems that are quiet. You will experience some amount of hum in every audio system. There are two kinds of hums that you hear, one that is low pitched and not too annoying, more like a silent hum; and another is a high pitched buzzing sound, similar to the sound of crickets. The silent hum is produced at 50-60 Hz while the high pitched buzzing is caused at 120 Hz. The most common reason for hum is a ground loop. In electrical systems, a ground loop happens when two points of a circuit are supposed to have the same ground reference potential but instead have different potential between them.

Ground loops are the cause of the noise, hum, and interference in audio, video, and computer systems. Fortunately, fixing hum is quite easy. For repairing hum, you first need to identify the kind of hum that your audio system is producing. If it’s a quiet hum, it’s probably due to poor cable connection or close proximity to a strong magnetic field. A loud buzz is caused by a ground loop.

Here are some tips to fix hum in 3 easy steps:

  • Try to turn the volume up and down

Try to turn the volume control on your speakers up and down and carefully listen whether the humming sound also goes up and down with the volume control. If it does, then it is probably coming from an external source such as a CD player. Unplug this device from the receiver or amplifier and the hum should go away.


  • Plug the cables in different inputs

You will see that your speaker is connected to the audio player with many cables and there are many input points in both devices. Try to connect the cables properly or plug them in different input points. If the hum goes away, it means that the problem was caused by the cables not being connected properly.

  • Disconnect all inputs

Unplug all cables that connect your speakers to an amplifier or receiver. Only connect the loudspeaker, speaker cable and the AC plug that is powering the unit. If the hum doesn’t go away, it’s caused by a ground loop.

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