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PHASING
To test two microphones and/or their cables for proper
phasing, connect them to an amplifier and talk or sing into
them while holding them three or four inches apart. The
sound from the speakers should be the same when talking
into either microphone or directly between them if they
are in phase with each other. If the sound drops drastically,
or if a dead spot is found when talking between the two
microphones, they are out of phase. All cables and micro-
phones should be tested in this manner to insure that they
are in phase with each other.
To change the phase of a microphone, the microphone
cartridge leads must be interchanged (see Figure 2). This
should be performed by your dealer, the Shure Factory
Service Department, or other qualified service personnel.
IMPEDANCE
Your Model PE58 is a high-impedance microphone. If
cable lengths over 7.6 meters (25 feet) are required, or
if the microphone is to be connected to a low-impedance
input, it will be necessary to transform the microphone
line to low impedance. Shure Model A95 Series Line
Matching Transformers are available for use in those
cases. These transformers provide a proper impedance
match between a high-impedance microphone line and a
low-impedance input and are supplied with various input
and output connectors.
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