Sharp XG-PH70X - Manual (Page 75)

Useful Features
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Speaker Setting
This function allows you to turn the audio out-
put of the internal speaker on or off when the
projector is connected to an external amplifier.
Menu operation Page 56
Example: “Audio” screen menu
Description of Speaker Settings
Selectable items
ON
OFF
Description
The audio signal is output from the internal
speaker.
The audio signal is not output from the
internal speaker.