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1. Re: cable for long xlr microphone cables

Subject: 1. Re: cable for long xlr microphone cables
From: "Avocet" madl74
Date: Fri Jun 22, 2012 8:49 am ((PDT))
> the advantage of using
quad cable for stereo recording was that you had back up with 2 cores
going to each channel, instead of just one.

That is not how to wire quad cable. Two opposite conductors are
connected to ground and the other two carry the signal. This balances
out external magnetic interference. If a double connected signal wire
breaks, you are likely to get an intermittent connection which could
produce fizzle or crackle. Also the cable impedance is given for the
standard quad connection, but as I have said before this is not
important for low impedance devices up to a few hundred metres.

When I had to have reliable cables for professional use, I would cut
off thte XLR's and resolder then about once a year. Cables break at
the "strain relief" point. A faulty cable is the last thing you need
on a location setup.

> Also you would have
better external noise rejection because the wires were spiralled
together rather than laying flat.

All audio cables have twisted conductors with the exception of
telephone cords, which carry high level signals. For a complete
answer, cat5 and cat6 multiple computer cables have "random" twists
where pairs are twisted to different pitches to reduce crosstalk, but
multiple audio cables need a separate screen for each pair in one


David Brinicombe
North Devon, UK
Cogito cogito ergo cogito sum - Ambrose Bierce

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