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Gear / Technical Help => Playback Forum => Topic started by: Teen Wolf Blitzer on September 28, 2011, 04:28:46 PM

Title: what would cause pc speakers to hum?
Post by: Teen Wolf Blitzer on September 28, 2011, 04:28:46 PM

I have a pair of M-Audio AV20's on my PC.  They have developed a low frequency hum all of a sudden.  Even when unconnected to the PC.  If I plug them in in another room the moment I turn the on switch the hum appears.  It doesn't change when I raise or lower the volume.  They play fine.  Any ideas?

Title: Re: what would cause pc speakers to hum?
Post by: twatts (pants are so over-rated...) on September 28, 2011, 04:38:11 PM

Ground loop???

http://en.wikipedia.org/wiki/Ground_loop_(electricity)

Some older houses and apt. have issues with electronics... 

Terry

Title: Re: what would cause pc speakers to hum?
Post by: page on September 28, 2011, 04:41:22 PM

Quote from: twatts and not wearing pants on September 28, 2011, 04:38:11 PM

Ground loop???

http://en.wikipedia.org/wiki/Ground_loop_(electricity)

Some older houses and apt. have issues with electronics... 

Terry

Bingo, I even have an interconnect cable that does this... I've sorted it out and use it in my office where I don't care as much. :-\

Title: Re: what would cause pc speakers to hum?
Post by: DigiGal on September 28, 2011, 06:37:37 PM

From your description it could be a bad filter capacitor in the speakers internal power supply.

Title: Re: what would cause pc speakers to hum?
Post by: Scooter123 on October 02, 2011, 10:52:34 PM

The equipment usually hums because it doesn't know the words...............