Harman-Kardon AVR 120 - Manual (Page 19)

19 SYSTEM CONFIGURATION
To adjust and calibrate the output levels, follow
these steps. For accurate calibration, it is a
good idea to make these adjustments while
seated in your favorite listening position:
1. Put the AVR 120 in the Dolby Pro Logic II
mode by pressing Surround Mode
Selector
7 on the front panel, or by
pressing the Surround Mode Selector
j on the remote, until PRO LOGIC
II scrolls across the Main Information
Display
F and the Pro Logic II
Indicators D light.
2. Press the Test Button h on the remote.
T-T FL 0dB will appear in the Main
Information Display
F and the letters
FL will flash once each second.
3. The test noise will immediately begin to
circulate among the speakers in a clock-
wise rotation, pausing at each position for
three seconds. As the test noise rotates,
the speaker position will be shown in the
Main Information Display
F.
NOTE: This is a good time to verify that
the speakers have been properly connect-
ed. As the test noise circulates, listen to
make certain that the sound comes from
the speaker position shown in the Main
Information Display. If the sound from a
speaker location does NOT match the posi-
tion indicated in the display, turn the
AVR 120 off using the Main Power
Switch
1 and check the speaker wiring
to make certain that each speaker is con-
nected to the correct output terminal.
4. After checking for speaker placement, let
the test noise circulate, and listen to see
which channels sound louder than the oth-
ers. Using the front left (FL in the display)
speaker as a reference, press the ▲/▼
Buttons
mq on the remote or the
Selector Buttons 5 on the front panel
for each channel to begin to bring them to
the same level. Note that when one of the
buttons is pushed, the test noise circula-
tion will pause on the channel being
adjusted to give you time to make the
adjustment. When you release the button,
the circulation will resume after 15 seconds.
5. Continue to adjust the individual speakers
until they all have the same volume. Note
that adjustments should be made with the
▲/▼ Buttons
mq on the remote or
the Selector Buttons 5 on the front
panel only, NOT the main volume controls.
Then press the Set Button
o to
memorize the change. If you are using a
sound pressure (SPL) meter for precise
level adjustment, set the volume so that
the meter reads 75dB, C-Weighting Slow.
NOTE: The subwoofer output level is not
adjustable using the test tone. To change
the subwoofer level, follow the steps for
Output Level Trim Adjustment on page 26.
6. When you have adjusted the output so
that all channels have the same level,
press the Test Button
h on the remote
to complete the adjustment.
Delay Settings
Due to the different distances between the
front-channel speakers and the listening posi-
tion compared to the surround speakers and
the listening position, the amount of time it
takes for sound to reach your ears from the
front or surround speakers may differ. You may
compensate for this difference through the use
of the delay settings to adjust the timing to
tailor the specific speaker placement and
acoustic conditions in your listening room or
home theater.
The factory setting is appropriate for most
rooms, but some installations create an uncom-
mon distance between the front and surround
speakers that may cause the arrival of front-
channel sounds to become disconnected from
surround-channel sounds.
To resynchronize the front and surround chan-
nels, follow these steps:
1. Measure the distance from the listening/
viewing position to the front speakers.
2. Measure the distance from the listening/
viewing position to the surround speakers.
3. Subtract the distance to the surround speak-
ers from the distance to the front speakers.
a. When setting the delay time for the
Dolby Digital surround modes, the opti-
mal delay time is the result of that sub-
traction. For example, if the front speak-
ers are ten feet away and the surround
speakers are five feet away, the optimal
delay time is figured as 10–5=5. Thus, in
this example, the delay time for Dolby
Digital should be set at five milliseconds.
b. When setting the delay time for the
Pro Logic II mode, take the result of the
subtraction and add 15 to obtain the
optimal delay time. For example, if the
front speakers are ten feet away and the
surround speakers are five feet away, the
optimal delay time is figured as
10–5+15=20. Thus, in this example, the
Pro Logic delay should be set at twenty
milliseconds.
NOTE: The Theater and Hall modes use a fixed,
nonadjustable delay time.
The Dolby Digital mode also includes a separate
setting for the center-channel delay mode, since
the discrete nature of these signals makes the
location of the center-channel speaker more
critical. To calculate the delay for the center
channel, measure the distance from the pre-
ferred listening position in the center of the
room to both the center-channel speaker and
either the left or right speaker.
If the distances are equal, no further adjust-
ment is required and the center delay should be
set to zero. If the distance to the front speakers
is greater than the distance to the center
speaker, you may wish to reposition the speak-
ers by moving the front-left and front-right
speakers closer to the listening position or the
center speaker further away from the listening
position.
If repositioning of the speakers is not possible,
adjust the center delay time, adding one mil-
lisecond of center-channel delay for every foot
closer to the listening position the center
speaker is than the front speaker. For example,
if the front-left and front-right speakers are
each 10 feet from the listening position and the
center-channel speaker is 8 feet away, the delay
is figured as 10–8=2, suggesting an optimal
center delay of 2 milliseconds.
21
29
L R
C
SL SR
LFE
System Configuration