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How do you fix a ground loop - Audio Players & Recorders

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Ground all electronics to the same connecting point, don't rely on grounds through equipment, or through the chassis , instead bring the ground from each to a single connecting point as close the the negative potential of the battery as possible. Make sure your ground wires are a heavy enough gauge so as not to create a large voltage drop between the actual ground and the equipment. The more current drawn by the equipment, the heavier the ground wire should be. Voltage drops occur on both the ground and the supply wires. When a ground wire is too small this voltage will vary with the current drawn, and you'll end up with a floating ground at the equipment.

Posted on Jan 13, 2014

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1 Answer

I have red bars of different widths running horizontally across the screen.


Hi You have a ground loop problem. Rolling shaded bars are the classic sign of a ground loop. Your TV & AV gear are likely not on the same
ground level as the input cable line. The cable line is likely floating
to a different ground. But this is not hard to fix.

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Bose lifestyle makes loud noise like a build up of


If you still have the speakers that the TV came with hooked up try unhooking the wires to them I had the same problem and it fixed the problem, Good Luck!

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1 Answer

I have Insignia ns-p42q-10a tv, there is a loud hum when the volume is on when you mute the volume it goes away? Any suggestions?


check other inputs AVI, HDMI,,

do you here the hum on all inputs?

The hum maybe from a bad ground loop,, unplug all pluged in inputs, [dvd,games,radio,ect] <--check for hum.

If the hum is gone, plug inputs back in one at a time and test,,

When you find the source of the hum, go get a ground loop isolator to fix.

Mar 25, 2010 | Insignia NS-P42Q10A Plasma TV

1 Answer

Input port cracels and buzzes


We can only guess what the input port might be a part of... Computer? Digital recorder? who knows...

You LIKELY have a ground loop. Use isolation techinque to eliminate ground loop. Tools for that often include what is known as a "DI" or direct input box. It often has an isolation transformer in it to break the ground loop. You use or set the DI to "ground lift".

Feb 27, 2010 | Music

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Humming/buzzing in aftermarket stereo when accelerating vehicle.


i once installed spark plug resistors (arrestors) that are supposed to help

Nov 06, 2009 | RCA Pac Sni1 Rca Ground Loop Noise...

1 Answer

Crysler lhs, static buzzing noise in speakers when accellarating?


This is usually indicative of a ground loop causing noise from the vehicle electrical system. Long story short your stereo isn't grounded well enough.

There are two possible solutions:

1. Ground all components to the same point. This will reduce the potential and should greatly reduce any noise.

2. If number 1 is not possible (and it often is not), use a "ground loop isolator", available at nearly all electronics stores, or car audio suppliers. This device prevents a direct electrical connection between the two sources and will usually fix the ground loop.

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1 Answer

Picture problems when earth is connected to remote cameras


Sounds like you need a ground loop transformer for each camera. You can get one a electronics shop. Just ask for a ground loop transformer. Connect it inline between the camera and where it's terminated. This will fix you.

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2 Answers

Rolling line


If this is seen when you are connecting to a cable box or satellite box like DirecTV through or other such device your issue is most likely a DC ground loop. Here are some suggestions:
Video Projector ground loop
1) If you have horizontal hum bars when your projector is connected to a set-top box or other equipment that are on a different circuit or are grounded causing a ground potential between the source and the projector
2) Hum bars are the result of a ground loop, usually caused by cable television that has not been properly grounded
Try this to verify:
1) Disconnect your cable television coax from the wall by unscrewing it.
2) Run your Projector and verify that you are no longer getting the lines.
If you have verified that the issue was a ground loop by testing the solution requires a DC
Ground Blocker style device similar to the below options:
1) Go to http://www.cablesandconnectors.com/02100-02.HTM (part number 2118)
2) Purchase a DC GROUD BLOCKER & ISOLATION TRANSFORMER either from the above or similar electronics store location.
3) Other examples and ground loop explanations for both Video & Audio can be found at the following link for information about ground loop; scroll to Why Ground Loop is a Problem:
http://www.epanorama.net/documents/groundloop/index.html
4) Other commercial antenna signal isolators are available on the web or simply see your local Radio Shack
5) Connect the isolator device chosen to your set-top box and hook it back up.
You will be back-up and running in no time.

Dec 29, 2007 | ASK Proxima Proxima DP2000S Data Video...

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