Brauner Microphones VMX lite - Manual (Page 10)

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3.3 The phase reverse switch
The phase reverse switch is located on the front panel of the remote and can be
used to invert the phase of the audio signal ( 180° ). When the switch is in the lower
position (0°) the non-inverted signal of the transformer outputs at Pin 2 of the XLR
connector (standard compliant; Pin2 “hot“). While most of the microphone preamps
expect the non-inverted signal at Pin2, some products (in particular US products)
are expecting the non-inverted signal at Pin3! One might think that due to the
symmetric layout of the preamplifi ers and the microphones that doesn´t matter.
However, practical experience shows that there are big differences in sound when
using the false pin assignment.
This means, if you have connected your microphone standard compliant (Pin2
“hot”) to product where Pin 3 is “hot“ and the sound is “thinner” compared to other
preamps, then you should turn the phase reverse switch into the 180° position. You
will recognize that the microphone sounds better now.
The phase reverse might also be used for diagnosis purposes in case you are working
with many different preamps alternately. So you will fi nd out which products are
compliant to the standard and which are not.