System Configuration
22
Speaker Output Adjustments
Adjustments and calibration of the
speaker output levels is important to
proper surround operation. During this
process, the unit is adjusted so that the
output levels from each channel have
a reference level that is as close to one
another as possible. A small amount of
time spent to properly calibrate the
AVR55’s output levels will enable the
unit to deliver all the performance it is
capable of within the environment of
your specific listening room.
IMPORTANT NOTE: Many listeners
are often confused aboutthe operation
of the rear (surround)channels. While
some assume thatsound should always
be coming fromeach speaker, mostof the
time there willbe little orno sound in
the surround channels.This is because
they are onlyused when amovie director
or sound mixerspecifically places sound
there to create ambiance,an effect or to
continue action from the front of the
room to the rear. Whenthe output levels
are properly set itis normal forrear/
surround speakers to operate only
occasionally. Artificiallyincreasing the
volume to therear speakers may destroy
the illusion ofan enveloping soundfield
that duplicates theway you hearsound
in a movietheater or concerthall.
Before beginning the adjustment process
make certain that all speaker connections
have be properly made. The system
volume should be set to the level that
you will use during a typical listening
session. Finally, make certain that the
Balance Control Ù is set to the center
“12 o’clock” position.
1. Press the Test Tone button k
on the remote to begin the adjustment
process. A test noise will circulate from
one speaker channel to the next, as indi-
cated in the Information Display
F
.
2. Take a minute to listen to the test
noise from each speaker as the location
indicated in the display changes. Check
to make certain that, for example, when
the display reads TEST-FRONT L,
that the test noise is coming from the
front left speaker. If the test tone’s loca-
tion does not match the display for any
channel, press the Test Tone button
k to end the adjustment and turn
the unit off using the
Main Power
Switch
1. Check all connections to
maker certain the Speaker Outputs
fi are connected to the proper speaker.
Installation Hint: While the test tone is
circulating among the channels, make
a note if it sounds reasonably equal in
volume, or if one channel or more
channels seems significantly louder than
the others.
3. When you have verified that all
channels are properly connected, press
the Channel Select button l to
begin the adjustment process.
4. When the Channel Select button
l is pressed, the test tone will stop
circulating and will be heard in the front
left channel only. Use the Volume
Controls ˘nto adjust the test noise
so that it approximates a normal listening
level. If you are using a sound pressure
level meter to calibrate the system, set the
volume level so that the meter reads 75dB,
C-Weighting, Slow.
5. Press the
Channel Select button l
again, and note that the test tone will
move to the center channel, as indicated
by the
TEST-CENTER indication in the
Information Display. Use the
Speaker
Level Adjust buttons m to raise or
lower the sound level so that it is equal to
the level just established in the front left
channel. DO NOT use the
Volume
Controls
˘nfor this adjustment, as
they control the main system level, not the
individual channel outputs. As the adjust-
ments are made, the display will indicate
the positive or negative offset from the
reference level set in the previous step as
CENTER : +2 DB. When the adjust-
ment is complete, press the Channel
Select button l again to move to the
next channel.
