Pyle Hydra PLMR440PA Owner's Manual page 8

Microphone Input Wiring
If you wish to use the public address feature in the PLMR440PA, all you need to do is
to connect the custom microphone included with the amp.
When you press the button on the microphone, it automatically cuts off the input to
Channels 1-4 from your audio source and presents the microphone signal to the
amplifier.
You can use the microphone to supplement either 2CH or 4CH audio input from your
signal source. In any case, when the mic switch is engaged, your audio input will be
silenced until the switch is released.
MI. ON/Audlo Input OFF
5wIIch
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Microphone
, (included)
7-PLMR440PA
Own"'s
Manual
Volume control