SpookedJunglist

Very good advice there. Also about grounding. You can also lift the ground so that you are not grounding your system Some consider this to be bad for short protection. In the world of Audio Visual it is common practice. Just in my office alone I use more than a handfull on shows with tons of wireless mics. Check out the pictures if you are curious as to what i call a ground lift.

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Madkat

isnt that kinda... unsafe?

CyberDruid

Actually makes good sense--when everything is grounded it all "talks"--when each problematic device is isolated from the common ground the noise would have to be less.

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SpookedJunglist

Only if there is something wrong with the device. And then there is a small risk of shock when you touch something metal on the device. But highly unlikely. Like i said we use them all the time in the Realm of audio visual. I am not talking about home Audio. I am talking concert with large scale productions where a buzz is unacceptable. and almost impossibal to get rid of without ground lifts. There are several different types we use. but the lifts in the picture are the most common. The next would be a XLR ground lift. I have never been shocked. You would basically have to touch the inside of the device to get shocked. Because It is unsafe to ground a device to its case.

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Hollowman8904

So what devices would I want to ground? I only have like two of those...

CyberDruid

According to Spooked--none--actually you would want to UNground them.

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SpookedJunglist

Well what I would recomend is taking two power strips and ground lifting one and not the other. And start testing them one by one. multiple combinations. But monitors make noise [crt] Dimmed lights make lots of noise. Flourescent lights do too[case lights?]. And I am not positive but i think your speakers are already lifted 3prong vs two prong. Check it. IF it is 2prong skip the lifting and work on moving things around[EMI is the culprit, or unclean power, possibly the amp itself.

Check your speakers. Find an empty outlet in the house. And plug in the speaker set up to it if no buz take a mp3 player and plug it in and check if it only buzzes with a signal. If it buzzes with nothing it could be either unclean power, Fix this with a battery backup. Or bad amp, No easy fix.

I am back to work but i will check back later.
Good luck
Spooked

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Hollowman8904

Whoops that what I ment. I UNgrounded my case and it still goes. But now I'm confused even more:


I unplugged the all of the audio cords, and it stopped. I have 4 cords going in: Front Left/Right, Center/Sub, Rear Left/Right, and Coax digital.

I had to unplug all four for it to stop, even the digital, which isn't supposed to be able to get interfearence.



I think it is something inside my computer. When I load or move the mouse or type or pretty much any kind of activity, the buzzing gets louder for the duration of the activity, then goes back down to a low buzzing again. The buzzing is loudest when I click or load something.

busa

Most buzzing in audio equiptment is caused from what is known as a 60 cycle buzz. 110v ac runs at 60 cycles per second.This can usually be fixed by ungrounding(good call spooked) or switching polarity on 1 or more items in the same outlet. This can be accomplished by using an ungrounded adaptor with both prongs the same size to allow you to reverse polarity on the plug. I have also seen fans and controllers cause a buzz in a pc audio system. Try unplugging fans and any lights in the rig 1 at a time.

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Hollowman8904

Flipping the plug doesn't work, and my case is ungrounded. But what confuses me is why the buzzing gets louder when I click the mouse or load something.

All of the following are on the same power strip:
PC
LCD Monitor
Cell Phone charger
External Drive Enclosure
The Speakers in question