Adcom GTP-740 - Manual (Page 38)

Remember that UNDO CHANGES allows you to exit the configuration process at any time without
memorizing any changes you might have just made. Scroll to UNDO CHANGES and press Select to
return to the SETUP screen.
Note: You may want to repeat these steps for Preset 2 and Preset 3. Just follow the steps above but
make sure you’ve chosen the proper PRESET prior to choosing a different configuration. If you don’t, the
new choices will overwrite those you’ve previously made.
3.6 CHANNEL BALANCE Screen
Why Do I Need To Balance Channel Output?
Proper system calibration (i.e., adjusting the relative output of all speakers to
compensate for system and placement variations) is an essential step if you wish to
enjoy a movie soundtrack or other multi-channel sound source as the director,
producer, or sound engineer intended.
Channel balancing (or “calibrating") a system simply means adjusting the GTP-
740’s main outputs to compensate for speaker level differences caused by varying
amplifier sensitivities, speaker efficiencies, and speaker placement—all the possible
variations
except those inherent in the software you will be playing .
The GTP-740 gives you several ways to adjust channel balance.
• The first is with the LEVELS MENU adjustments accessed from the SETUP menu
screen. As weVe already pointed out, we suggest that you not use this initially. It
adjusts levels of the main front (left and right) speakers simultaneously and of both
rear speakers simultaneously. Although this has advantages in certain situations, it
is not ideal here.
• The next is with the CHANNEL BALANCE screen. See below for details.
• Another Is by using the remote controller's bai. chk button. This is the preferred
mediod for initial calibration.
• The last is by using the rear, center, and sub Up/Down buttons on the remote.
These are intended for “on the fl/; corrections for some perceived shortcoming in
the source you're currently enjoying!
From the SETUP screen, select CHANNEL BALANCE with the Up/Down buttons and press Enter.
You will see:
CHANNEL BALANCE
LEFT +
RIGHT
CENTER -
+
REARL - +
REARR - +
SUB +
UNDO CHANGES
DONE
LEFT will be highlighted. The < and > arrow buttons will decrease and increase LEFT channel level
respectively. When you’ve completed this adjustment, scroll to RIGHT and, once again, use the < and >
arrow keys until the RIGHT level is satisfactory. Continue through CENTER, REAR L, REAR R, and SUB.
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