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Hi, I'm redoing the connectors for some cables that will be used with the Shure 58A microphone. When I opened up the XLR connectors, pin 1 and pin 3 are shorted with a copper wire. Is this really needed?

I thought normally the XLR convention is:
1- ground
2- positive
3- negative

Thanks.

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Kev Sun, 12/06/2009 - 12:19

Stratos wrote: ... , is the shorting really necessary?

depend on situation and equipment
See the Rane Library for interfacing notes for a good description and various methods

http://www.rane.com/note110.html

look at the Fig3
Test Cable

this is cool cos you can try before you commit
while things are plugged in and signal is flowing
you can hear the effects of the Sheild to Pin 3
OR shield to Pin 1
and listen for earth loop issues and the level of the noise floor

I know the topic was initially about the 58A mic and this was supplied with the short