LG PF85U - Manual (Page 108)

108 CONNECTING DEVICES
Connecting a Digital
Amp
Using an optical cable, connect the
digital audio input port of a digital amp
to the
OPTICAL DIGITAL AUDIO OUT
port of the projector. The output of an
amp with a digital converter must be set
to the desired audio format. When using
a HDMI cable to connect a home theater
or when connecting an optical output
to an external audio device, set
Sound
Out to External Speaker (Optical/HDMI
ARC) as shown below. If a projector,
home theater, or the speaker of an
external audio device is operating at the
same time, there will be an echo.
NOTE
y Also, refer to the user manual of the
audio device to connect.
y When connecting this product to
other devices, make sure to turn off
and unplug all the devices.
y The audio output of this product
has wide-ranging audio bandwidth,
so the receiver volume must be
adjusted properly.
Speakers can be damaged by
unexpected high frequencies.
y Connecting the OPTICAL DIGITAL
AUDIO OUT port of the projector
to the digital audio input port of a
digital amp and the audio input port
of the projector to the analog audio
output port of the digital amp can
cause sound oscillation due to the
closed loop. Remove one of the two
connections to prevent this.
(This also applies to home theater
devices.)
* Optional
Extras