Harman Kardon AVR 55 Owner's Manual page 22

6. The test tone will now be heard
through the front right speaker. Once
again, first listen to the test noise to
determine if it is louder or softer than the
previous two channels. If an adjustment
is required, use the
Speaker Level
buttons until the level is
m
Adjust
matched. In this case, the offset level for
both front channels will be shown in the
display, such as
FL 0
the indication will change, as only
FR
the front right channel is being adjusted
at this time. When the level is equal to
the front left and center channels, press
the button
Channel Select
move to the next channel.
7. The test tone will now be heard from
the right rear (surround) channel.
Follow the instructions shown in the pre-
vious step until the volume level for this
channel is equal to the others. Press the
button
l
Channel Select
have finished with the right rear to move
to the final channel.
8. Adjust the output from the left rear
(surround) channel as shown in the pre-
vious steps. Remember, the goal is to
have the sound level equal to all previous
channels, using the
Speaker Level
buttons to make any needed
m
Adjust
changes.
System Configuration
9. At this point, you should make a final
check on the adjustments. Press the
Channel Select
that you circulate the test noise among
all the channels. Make a note of which
channels need fine adjustments to raise
or lower their level so that they are
brought into line with the others. When
an adjustment is needed, simply stop
. Only pressing the button and make the level
FR +0
change using the
Adjust
10. When you are satisfied that all
channels have the same output level,
to
l
press the
return the AVR55 to normal operation.
Delay Settings
One aspect of the surround modes is the
delay of audio signals between the front
speakers and the rear speakers. Each
surround mode is factory preset with a
after you
specific delay time, but it is possible to
individually adjust the delay timing to
custom tailor the sound to your individ-
ual taste and the acoustic conditions in
your listening room or home theater.
The factory setting is appropriate for
most rooms, but some installations
create an uncommon distance between
the front and surround speakers that may
cause the arrival of front channel sounds
to become disconnected from surround
channel sounds.
23
button quickly so
l
Speaker Level
buttons .
m
button to
i
Test Tone
To resynchronize the front and surround
channels, 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 speakers from the distance
to the front speakers.
a. When setting the delay time for
the Dolby Digital surround mode,
the optimal delay time is the result-
ing figure. 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=5. Thus, in this
example, the delay should be set at
five milliseconds.
b. When setting the delay time for
the analog Pro Logic 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 delay should be
set at twenty milliseconds.