[BC] The XLR pinout debate

[Ron Cole]

I thought this debate was settled in the early 1970's ....

I have always wired them Shield-1, Red-2, Black-3 since I started in the
business which was 1975.


Ron


On 8/12/06, Cowboy <curt at spam-o-matic.net> wrote:
>
> On Saturday 12 August 2006 06:23 pm, Peter Smerdon wrote:
>
> > I'm recalling that before the standard, pin 2 hot was common in UK and
> > Europe, and pin 3 hot in US and Japan.
> > Australia was importing pro audio gear in about equal measure from both
> > camps, so it was a right royal mess down here.
>
> Though it should not have been so.
>
> The equipment doesn't really care which is + and which is - since both
> are carrying an AC signal.
> An amplifier will amp an AC signal regardless !
> The only time it would matter, would be if different wiring were on the
> same
> cable, or in the case of some polarity dependant device, like the mod
> input
> on an AM transmitter.
> At no other time would it make a hill of beans, until people start
> thinking
> it does, and "fix" something that isn't broke !
>
> I know of no manufacturer that ever sold any broadcast grade gear that
> reversed the polarity between input and output, except the boxes
> very deliberately designed to do so, like a symetripeak <sp>.
>
> Oh, sure, we all know ( or we all should know ) that positive pressure on
> the
> microphone diaphragm is supposed to produce positive going voltage at the
> output pin labled + but how do we know what the polarity was on the
> record ( that's CD for you kids ) when it was recorded ?
>
> --
> Cowboy
>
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