JBL AVR 140 - Manual (Page 23)

SYSTEM CONFIGURATION 23
System Configuration
pensate for this difference through the use of the
delay settings to adjust the timing for the specific
speaker placement and acoustic conditions in
your listening room or home theater.
To re-synchronize the front, center and surround
channels at first measure and note the distance
from the listening/viewing position to the front,
center, surround and surround back (if any)
speakers in meters.
Due to the differences in the way each surround
mode operates, the delay settings must be estab-
lished individually for each surround mode.
However, once the delay settings are configured
for the version of the surround mode with the
most channels, they need not be entered again
for a version of that mode with fewer channels.
For example, once the delay settings are estab-
lished for Dolby Pro Logic IIx – Movie, they will
be carried over to Dolby Pro Logic II – Movie
mode. However, you will need to enter the delay
settings separately for each variant mode, such
as Dolby Pro Logic IIx – Music, Dolby Pro Logic
IIx – Game, Dolby Pro Logic, Dolby 3 Stereo and
Dolby Digital EX.
Delay times are adjustable for all surround
modes. Although all channels will appear on
screen with the default or previously entered dis-
tances, the menu system will only allow you to
adjust the settings for those channels which are
actually used by the current sur-round mode. For
example, when you are listening to music CDs
using the CD input in DSP Surround Off mode,
you may adjust the delay settings for the front
left, front right and subwoofer channels only. The
cursor will simply skip the other channels as you
navigate through the menu. Therefore, the first
time you adjust the delay settings, it is recom-
mended that you select a 5.1-, 6.1- or 7.1-chan-
nel surround mode, depending on the number of
speakers in your system. For the purposes of set-
ting the delay distances, the Logic 7 modes allow
access to the settings for all channels without
requiring that you play a source.
When your system includes a surround back
speaker, delay distances should be entered twice
for this speaker, once for the surround back left
channel, and again for the surround back right
channel. This enables the mixing circuit that com-
bines the signals for these channels when a 7.1-
channel surround mode is in use to output the
information correctly.
To start with the delay settings at first select the
DELAY ADJUST MENU (Figure 9). If the
system is not already at that point, press the
OSD button
L to bring up the master menu.
Press the ¤ Button D three times or until the
on-screen ➞ cursor is pointing at the MANUAL
SETUP line. Press the Set Button F and
call up the DELAY ADJUST submenu.
Figure 9
Next move the ➞ cursor to the UNIT line and
select the unit for distances you prefer to enter,
feet or meter. Then move the
➞ cursor to the
F L line where the first adjustment is made. Now
press the ‹ / › Buttons Ea until the dis-
tance from the front left speaker to the preferred
listening position is entered. Next press the
¤
Button D once to move to the next line.
Now the ➞ cursor will be at the CEN line so
that the delay for the center speaker may be set.
Press the
‹ / › Buttons Ea until the dis-
tance from the main listening position to the
center speaker is entered. Repeat the procedure
for all active speaker positions by pressing the
¤
Button D again and use the
‹ / › Buttons
Ea to change the setting. Remember that
this last adjustment will only be needed when
you have surround back speakers installed and
Dolby Digital chosen as the surround mode.
When the delay time for all speaker positions has
been set you may return to the master menu by
pressing the
⁄ / ¤ Navigation Button D
until the ➞ cursor is pointing to
BACK T O
MASTER MENU and then pressing the Set
Button F.
The delay settings may be adjusted at any time
using the remote control and while viewing an
on-screen image by pressing the Delay Select
Button
Z.
To change one of the individual speaker positions
directly, press the Delay Select Button
Z,
followed by the ⁄ / ¤ Navigation Button D
to select the desired position as that name
appears in the on-screen display and the Lower
Display Line Ò. When the name of the speak-
er position to be adjusted appears press the Set
Button
F within five seconds. Press the
‹ / ›
Navigation Button Ea to enter the
desired delay setting for that speaker and then
press the Set Button
F to enter the setting.
The ⁄ / ¤ Navigation Button D may be
used to select another position, or you may sim-
ply wait five seconds for the system to time out
and return to normal operation.
Output Level Adjustment
Output level adjustment is a key part of the
configuration of any surround-sound product. It
is particularly important for a digital receiver such
as the AVR, as correct outputs ensure that you
hear sound tracks with the proper directionality
and intensity.
NOTE: Listeners are often confused about the
operation of the surround channels. While some
assume that sound should always be coming
from each speaker, most of the time there will be
little or no sound in the surround channels. This
is because they are only used when a movie
director or sound mixer specifically places sound
there to create ambience, a special effect or to
continue action from the front of the room to
the rear. When the output levels are properly
set, it is normal for surround speakers to
operate only occasionally. Artificially increasing
the volume to the rear speakers may destroy the
illusion of an enveloping sound field that dupli-
cates the way you hear sound in a movie theater
or concert hall.
When the AVR is configured for 6.1-channel
operation using a single surround back speaker,
the output level adjustments will still provide an
adjustment for separate surround back left and
surround back right positions even though your
system has only one surround back speaker. This
means that the Surround Back channel will seem
to appear twice, and in 6.1 operation this is nor-
mal. The separate SBL/SBR adjustments for 6.1
operation are needed to optimize the balance
between the two discrete channels within the
AVR as they are mixed for output to a single
speaker.
IMPORTANT NOTE: The output level can be
adjusted for each digital and analog surround
mode individually. This allows you to compensate
for level differences between speakers, that may
also vary with the surround mode selected, or to
increase or decrease the level of certain speakers
intentionally, depending on the surround mode
selected. Note that adjustments made for any
surround mode are effective with all inputs asso-
ciated with the same surround mode.
* D E L A Y A D J U S T *
F L : 1 0 F T S B R : 1 0 F T
C E N : 1 0 F T S B L : 1 0 F T
F R : 1 0 F T S L : 1 0 F T
S R : 1 0 F T S U B : 1 0 F T
D E L A Y R E S E T : O F F
U N I T : F E E T
B A C K T O M A N U A L S E T U P
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