ESC 300 Sub (serv.man14) - JBL Audio User Guide / Operation Manual. Page 8

Dolby Pro Logic
Use this mode for films
recorded using Dolby Pro Logic
Surround. The surround
channels have a 20-ms delay.

Phantom
This mode creates surround
sound from stereo recordings.
The center channel is not used
and the surround channels
have a 20-ms delay.

Simulated
This mode provides surround
sound with no delay for the
surround speakers. This is not a
Dolby mode.

3-Stereo Mode
Use this mode to play back Pro
Logic-encoded films when you
do not want the surround
channels to play.

Stereo
This mode plays a recording in
traditional two-channel stereo.

The test tone is used to
calibrate the volume settings of
the speakers. A static noise will
be heard cycling, in order, from
the front left, center, right, and
both surround speakers.

Using the remote control,
adjust the Center and Surround
levels until the volume of all
the speakers is the same during
the test.

Note: The test tone is used to
calibrate the performance of
the system. When listening to
an actual recording, the volume
level of the surround channels
is generally much lower than
that of the front channels. In
fact, when listening to a movie,
virtually all of the dialogue and
a substantial amount of the
effects are reproduced through
the center channel.