ac plug noise ..

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task

ac plug noise ..

Post by task » Thu May 09, 2002 10:23 pm

there was a few posts regarding ac plug creating noise..
the solution is to pick up a ground lift unit/socket.
it cheats a 3 prong into a regular 2.
ask your local electronic store or any pro studio engineers, they will know about ground lift.

FORMAT
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Post by FORMAT » Fri May 24, 2002 9:59 am

Do you remember if this affected PC or Mac notebooks or both? Would be interesting to know....
Thanks

FrankH
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Post by FrankH » Mon May 27, 2002 7:41 pm

Hello,

Mostly the ac plug is not the one that causes problems.
In most cases it is a ground loop in the audio setup.
eg. not proper grounded guitar amp, connected to the computer through a long cable or the computer directly connected to the PA.

With cable runs, audio cables, of over 10meters / 30feet it is recomended to use a DI box (ground isolator / transformer). Not on the power supply, but on the audio path.

It's best to have a stereo (or two mono) DI box (es) with on one side two Jack connectors (use a small plug to convert to cinch) and on the other side XLR, those 3 pin connector.
This will end all problems!

Hope this gives clarity.
Enjoy the music,

f

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