ESC 350 Source (serv.man3) - JBL Audio Service Manual (repair manual). Page 12

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1. Dolby Pro Logic – 
In this mode all five
speakers are used.

2. Dolby Pro Logic Phantom –
In this mode the center
channel does not operate.
This may be preferred
when listening to a music
source that was not
recorded with surround-
channel information.

3. 2-channel – In this
mode the program is
played back in a tra-
ditional stereo form.

Dolby

*

Pro Logic

*

is an

encode/decode process by
which four channels of
sound-track information
are encoded into two 
channels for playback on
VCRs, laser disc players,
and some TV broadcasts,
and then decoded back

into four channels for 
playback through five 
loudspeakers. Remember
that a Dolby Pro Logic 
system consists of three
channels of information 
for front left, center, and
right speakers and one
channel of mono surround

information. The surround
channel is played back
through two speakers.
Dolby Pro Logic helps to
re-create all of the impact
and excitement of a movie
theater in your home.

This system contains three surround modes.

To switch between the
three surround modes: 
Push “Surround Mode” on
The Source or 

If you are listening to a
program in the Dolby Pro
Logic Normal or Phantom
mode and you wish to turn
off the surround speakers:
Push “Rear Speakers” on 
The Source.

the remote control.

TM

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ESC350 Simply Cinema OM  9/11/98 2:06 PM  Page 15