Re: XLR Polarity


<jamie@xxxxxxxxxxxxxxx> wrote in message
news:e6532251-7ae0-42e2-a363-3396a030c691@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Hi,

I am using a set of Sennheiser IEM in a dual mono configuration and
suspect that I have a polarity problem. My setup is that the monitor
send of the band mixer goes into the transmitters left channel and I
have a small submixer that goes into the transmitters right channel. I
use this submixer to create a monitor mix of just my guitar and vocals
(which are already in the monitor mix from the main mixer). I do this
so I can easily adjust the amount of vocal and guitar in my in-ears.

Starting from just the main monitor mix, I can hear my guitar well,
but as I raise the signal from the submixer, the guitar volume drops
until I start to decrease the main monitor signal level. Is this
likely to be due to polarity inversion? Can I fix this by inverting
the polarity of one of the XLR cables going to the transmitter?

Thanks,

Jamie

I suspect that the problem may be cancelation between the guitars' mic or
pickup and the vocal mic. Is the guitar so loud that it bleeds into the
vocal mic? Turn off the vocal mic and see if the problem still exists. Then
turn off the guitars amp or DI feed to the PA and see it the problem still
exists.

Sometimes processing gear inverts polarity. I have noticed this with a
certain model of feedback suppresser which flips it between active and
bypass.


.

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