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noise on headphone output

Discussion in 'Multimedia' started by poppers5, Dec 29, 2008.

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  1. poppers5

    poppers5 Thread Starter

    Dec 29, 2008
    I have been having a problem with line noise when I connect the headphone output from my laptop to my pa. I have read lots of post and most did not answer the problem. I found the solution. Use a three prong to two prong adaptor on your laptop electrical plug where it plugs into the electrical receptical on your wall or electrical outlet. They cost about $2.00 at any hardware store. Using the adaptor will eliminate the large center ground. I do not believe it will damage the laptop doing this. The plug into the laptop is only two wires, the third grounding wire is for the transformer only. It is the same kind of problem when you have a pa system and a ground loop. It is sometimes necessary to remove the shielding ground on microphone cables.
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