ESC 550 Source (serv.man16) - JBL Audio User Guide / Operation Manual. Page 16

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For proper Dolby Pro Logic
operation, a test tone is used to
calibrate the volume settings of
the speakers. A noise will be
heard cycling, in order, from the
front left, center, right, and
both surround speakers.

Using the remote control, push

“Tone.” Then 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.

Push “Calibrate” on the remote
control until “Balance” appears
in the display.

Push “+” on the remote 
control to adjust the balance
toward the right speaker.

Push “–” on the remote 
control to adjust the balance
toward the left speaker.

Push “Calibrate” on the remote
control until “Center” appears
in the display and the
corresponding LED on top of
the display is lit.

Push “+” on the remote 
control to increase the volume
of the center channel.

Push “–” on the remote 
control to decrease the 
volume of the center channel.