Speaker hum

gogreen said:

OK, zigzag3143. And how do I solve the problem? Thanks. I get the feeling that curing this problem could be more complicated than I suspected.

You might want to google audio hum yourself so you can choose the solution that will work best for you. There is a somewhat complicated description of the fix here

Avoiding Ground Loop Hum

There are devices (isolated, impedance balancers, etc) but more often than not if you make sure all the cables are solidly grounded and hopefully the computer as well, it may minimize it.

Also, this type of noise is usually more prevelant in spkr sys with sub woofers. If the sub is ampliefied I would start there.


ken J

gogreen said:

OK. Thanks, Ken J. Yes, the Logitech Z2300 speaker system includes a subwoofer. I'll have to move some things around and check all that's been suggested here. Thanks again.

Do you have any small wall-wart power adapters in the vicinity of your speaker wires?

Are the speakers plugged into the same power supply as the computer, the same wall outlet? Also, does the speaker system power supply have a 2 or 3 prong (grounded) plug.

The Logitech you own is a well built system so I doubt if you need to deal with beefing up filter capacitors.

Ap

gogreen said:

OK. Thanks, Ken J. Yes, the Logitech Z2300 speaker system includes a subwoofer. I'll have to move some things around and check all that's been suggested here. Thanks again.

Last on this..

If the Logitech speaker system has a three prong plug, use a ground lift adapter (3-prong -> 2-prong) and see if that eliminates audible hum.

Ap

The problem is the insulation surrounding the speaker wires isn't sufficient enough for all the electricity that the computer is generating from the power supply and other electronics and the hum is the sound of electricity penetrating you insulation and rendering it audible through the speakers. Most computer speaker manufacturers don't consider that. The only solution is to buy a high quality sound system for the computer one that is made for that type of environment...cause I wouldn't be breaking out the black electrical tape to beef it up, also speakers that plug into the outlet on the back of the motherboard are very susceptible to noise cause the electronic components used to create the outlets aren't of high enough quality...grounding won't get rid of this noise....speaker magnets are wonderful tools in amplifying the sound of electricity...

I forgot that one way to help the situation is to turn the sound down on the computer to about 50 percent and make sure you don't have microphones un-muted and things of that nature also turn the speaker volume down so not so much electricity is amplified....