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I hit **** with sticks!
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Discussion Starter #1
I am looking for a noise suppressor to filter electrical noise coming into my computer.

I am getting terrible interference thru my sound system, the source being my computer, as long as its plugged into the wall. If I run it on battery, no issues. None of my other audio devices cause this problem, which is weird, it must just be the way the computer is wired.

Can anyone recommend a 120V noise filter that will take out interference from the wall plug?
 

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Just get a high quality UPS that can clean the power up.... I have a feeling it is just the grounds... I have seen computers and radio systems ground out slightly different even when using the same wall outlet... Have been shocked by it numerous times because they are trying to even the ground out... Through me...
 

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I hit **** with sticks!
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37,587 Posts
Discussion Starter #4
Not sure. Its weird. With the laptop plugged in to the wall I can hear my mouse movements over the speakers, along with a high pitched buzz.

The other night I was running it and had an extremely loud buzz in the speakers, almost like a speaker cable was shorted. It went away as soon as the laptop was unplugged. Tried different outlets, no change. Plugged it in a couple hours later and no buzz, just the normal mouse interference.

I think something may have been running on the same circuit (like the refrigerator) causing that.
 

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I hit **** with sticks!
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37,587 Posts
Discussion Starter #6
Found a simple, free solution...luckily...if the laptop isnt plugged into the same power strip the speakers are, no noise. Just have to plug it into a separate outlet. Not sure what the problem was with the buzz the one night, but ever since, as long as its in a separate outlet, its been fine.
 

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Found a simple, free solution...luckily...if the laptop isnt plugged into the same power strip the speakers are, no noise. Just have to plug it into a separate outlet. Not sure what the problem was with the buzz the one night, but ever since, as long as its in a separate outlet, its been fine.
Was Ozzy Osborne the Prince of Darkness playing??
 

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I know, holy old thread....but the mention of the laptop being on a different power strip than the speaker system is key here.

They powerstrip is the noise filter in this case. It usually doesn't take more than a usual $20 surge/noise strip to solve this stuff.

Keep in mind, most units do not isolate the outlets on the strip itself. Interference generated outside the strip with the filter cant get into it well, and interference generated by things on the strip cant spread interference outside the strip. However, devices connected to the strip can share interference as long as they are on the same strip if the strip doesn't have filtering on each outlet.

You gotta pay more $$$ for strips with isolated banks of outlets. Most of the higher end A/V strips do this as well as the good old Tripp-Lite Isobar. (the one in the metal case!)
 
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