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Front Panel Controls

1

Press this

button to apply power to the AVR55.
When the switch is pressed the unit
is placed in a Standby mode, as
indicated by the amber LED 

3 sur-

rounding the 

control

2. This button MUST be pressed in
to operate the unit regardless of the
status of the Power Switch at the
bottom of the front panel. To turn the
unit off and prevent the use of the
remote control, this switch should be
pressed until it pops out to extend
from the front panel so that the word
“OFF” may be read at the top of the
switch.

NOTE:

In normal operation this

switch may be left in the “on”
position.

2

When

the 

1 is

pressed in, press this button to turn
on the AVR55, press it again to turn
the unit off. Note that the 

surrounding the switch 3

will turn green when the unit is on.

3

This LED will

illuminate in amber when the unit is
in the Standby mode, to signal that
the unit is ready to be turned on.
When the unit is in operation the
indicator will turn green.

4

This button is

used to enter settings for speaker
modes, tuner presets and delay 
time after making the appropriate
selection.

5

This jack may

be used to listen to the AVR55’s out-
put through a pair of headphones.
Be certain that the headphones
have a standard 

1

⁄

4

″

stereo phone

plug.

6

Press this button to

select the stereo or mono mode for
FM tuning. In the STEREO mode a
STEREO indicator will illuminate in
the information display, and stereo
reception will be provided when sta-
tions are transmitting stereo signals.
In the MONO mode the left and right
signals from stereo broadcasts will
be mixed together and reproduced
through all channels. Select MONO
for better reception of weak signals. 

7

This switch

controls the front left/right speakers.
For normal operation it is pressed in
and sound is heard through the front
speakers. To silence the front
left/right speakers, push the button
once until it is in the “out” position.
When the front speakers are turned
off sound will continue to be heard
through the center and rear speakers
and the headphone jack.

8

Press this button to

select the tuner as the AVR55’s input
source. When it is first pressed the
last station tuned will appear. Press
it again to change between AM and
FM bands.

9

Press the left 

side of the button to tune lower
frequency stations and the right side
of the button to tune higher frequency
stations. When a station with a strong
frequency is tuned, the 

indicator will illuminate in the

35. A brief 

(1/2 second) press of the button will
manually tune to the next frequency
increment, while pressing and hold-
ing the button for a longer period will
automatically tune to the next station
with a signal strong enough for
acceptable reception.

)

Press this button to select

the device connected to the 

jacks d as the listening

source.

!

Press this button

to select the device connected to
the 

jacks ⁄ as the lis-

tening source. The 

indicator

K will illuminate to indicate that the
Tape Monitor has been selected,
while the input being monitored will
remain in the 

F.

@

Press this button to

select the device connected to the

jacks ª as the listening

source.

#

Press this button to

select the 

e as the

listening source.

$

Press this button to select the

device connected to the 

jacks ¤ as the listening and viewing
source.

%

Press this button to

select the device connected to the

jacks ‹ as the listening

and viewing source.

^

Press this button to 

select the device connected to the

jacks ° as the listening

and viewing source.

&

Press this button 

to select the device that will be
recorded by the device connected
to the 

jacks ›. The

selected source is shown in the 

indicators 

A in the

35. Note that

this recording will take place even if
another source is being listened to.

*

Press this button to select

the device connected to the 

jacks · as the listening and

viewing source.

Front Panel Controls

(

Press this 

button to choose either the rear
panel 

jacks · or the

front panel 

˜ as the

input source. When the green light
above the button is illuminated, the
front panel jacks are selected.

Ó

Press

this button to configure the AVR55
for the type of speakers used in your
system. See page 18 for details on
using this button.

Ô

Press this button

to turn the surround modes off to 
listen to a source in traditional two-
channel stereo from the front
left/right speakers only.



Turn this control to

modify the low frequency output of
the left/right channels by as much as
±10dB. Set this control to a suitable
position for your taste and room
acoustics.

Ò

Press this

button to select one of the analog
surround processing modes (Dolby
Pro Logic, Dolby 3 Stereo, Theater,
Hall, Stadium and Church) for a
listening session.

Ú

Turn this control

to modify the high frequency output
of the left/right channels by as much
as ±10dB. Set this control to a
suitable position for your taste and
room acoustics.

Û

Press

this button to listen to a source when
a PCM or Dolby Digital (AC-3*)
signal is present.

NOTE:

Dolby Digital may only be

used with the 

, 

, 

, 

and 

inputs.

Ù

Turn this

control to change the relative volume
for the front left/right channels.

NOTE:

For proper operation of the

surround modes this control should
be at the midpoint, or “12 O’clock”
position.

ı

When the

Û has been

pressed, this button is used to select
the type of digital input to be used.

NOTE:

The coax or optical inputs

may be selected with the 

, 

,

, 

and 

inputs. The 

RF input may be used with the 

input only.

ˆ

Press this button 

to activate the “Night” mode, pre-
venting a loud playback when the
digital modes are in use.

˜

These jack may

be used to temporarily connect an
audio/video source such as a video
game or camcorder to the AVR55. 
To select these jacks as the input,
press the 

button

( until the green LED above that
button is illuminated.

¯

Press this button when

listening at low levels to activate
special circuits that compensate 
for the response of the human ear 
at lower volumes. In the off position
the unit will provide flat frequency
response.

˘

Turn the knob

clockwise to increase volume, 
counterclockwise to decrease the
volume. Note that approximately two
revolutions of the knob are required
to go from no output to maximum
volume.

¸

Press these buttons to raise or lower
the output to the subwoofer channel.
These buttons should be used dur-
ing normal listening sessions for
touch-up adjustments, not when the
test signal is being used for major
system alignment.

33

Press

these buttons to raise or lower the
output to the center channel. These
buttons should be using during
normal listening sessions for touch-
up adjustments, not when the test
signal is being used for major
system alignment.

34

Press these buttons to raise or lower
the output to the surround channels.
These buttons should be used dur-
ing normal listening sessions for
touch-up adjustments, not when the
test signal is being used for major
system alignment.

35

This 

display delivers messages and 
status indications to help you operate
the receiver. Refer to the separate
diagram for complete explanation of
the FL display.

36

The

sensor behind this window receives
infrared signals from the remote con-
trol. Aim the remote at this area and
do not block or cover it unless an
external remote sensor is installed.

37

Press these

buttons to enter or recall stations
entered to the tuner’s preset memory.
See page 25 for complete information
on using the tuner and the preset
memories.

Front Panel Information Display

DIGITAL 

HALL

THEATER

STADIUM

CHURCH

SLEEP

PRO  LOGIC

VID 

1

 REC CONTOUR

STEREO

TUNED AUTO MEMORY PRESET

T MON

•

3  STEREO

-

F

M

L

K J I

G

H

B

A

D

E

C

A

Vid 1 Record Indicators

B

Dolby Digital Indicator

C

Analog Dolby Surround Mode Indicators

D

Analog Surround Mode Indicators

E

Sleep Indicator

F

Main Information Display

G

Preset Indicator

H

Memory Indicator

I

Auto Mode In Indicator

J

Tuned Indicator

K

T-Mon Indicator

L

Stereo Indicator

M

Contour Indicator

A

A dot

appears next to one of the sources
shown in this indicator to tell you
which input has been selected as
the output to the device connected
to the 

jacks ›. Press

the 

button 

& to change

the source.

B

This

indicator illuminates when a Dolby
Digital source is being played.

C

These indicators illumi-

nate when one of the analog (matrix)
dolby Surround modes is in use.

D

These indicators illumi-

nate when one of the DSP generated
analog surround modes is in use.

E

This indicator is

illuminated when the Sleep function
is in use. The number that appears
above the indicator is the number of
minutes remaining before the AVR55
will return to the Standby mode.

F

This

display shows messages relating to
the status, input source, surround
mode, tuner, volume level or other
aspects of unit’s operation.

G

This indicator

illuminates when one of the stations
entered into the preset memory is
tuned. The number that appears
below the indicator is the preset
station’s memory.

H

This flashes

after the 

button 

4 u has

been pressed to indicate that you
should quickly select and enter a
preset memory location for a specific
radio station.

I

This

indicator illuminates when the “Auto”
mode is in use for FM tuning.

J

This indicator

illuminates when a station is being
received with sufficient signal
strength to allow for acceptable
listening quality.

K

This indicator

illuminates when the Tape Monitor
function is in use to remind you that
you are listening to the record output
of the device connected to the 

jacks ‚, not to the actual

input source shown in the

.

L

This indicator

illuminates when an FM station is
being tuned in stereo.

M

This indicator

illuminates when the Contour circuits
have been engaged by pressing the

button 

¯.

Rear Panel Connections

CENTER

PRE-OUT

REAR

PRE
OUT

FRONT

ANTENNA

MAIN

IN

PRE
OUT

AM

LOOP

FM

75

Ω

SUB

WOOFER

OUT

AC-3

RF/PCM

GND

COAXIAL/PCM

OPTICAL/PCM

MODEL NO.: AVR55
HARMAN KARDON
NORTHRIDGE
CALIFORNIA, U.S.A.

R

REAR SPEAKER (8

Ω

)

FRONT SPEAKER (8

Ω

)

CENTER SPEAKER (8

Ω

)

R

L

L

SWITCHED

~

120V/60Hz

TOTAL 100W

1A MAX

AC OUTLETS

OUT

VIDEO

MON.

REMOTE

CONTROL

VIDEO 2

PLAY

IN

DVD

PLAY

TV/AUX

OUT

VIDEO 1

IN

R

L

L

R

VIDEO

TAPE 2

REC

TAPE 1

REC

TAPE 2

PLAY

TAPE 1

PLAY

CD

PHONO

L

R

L

R

L

SER. NO

R

AC INPUT

~

120V/60HZ

3.2A

fl

‡

°

·

a

b

c

e

d

f

g

h

i

¡

™

£

∞

§

¶

•

ª

‚

¤

‹

⁄

›

¢

fi

¡

AM Antenna

™

FM Antenna

£

Center Channel Preamp Output

¢

Rear Preamp Outputs

∞

Subwoofer Output

§

Ground Terminal

¶

Optical/PCM Digital Input

•

Tape 2 Rec

ª

Tape 2 Play

‚

Tape 1 Rec

⁄

Tape 1 Play

¤

TV Inputs

‹

DVD Input

›

Video 1 Outputs

fi

Speaker Outputs

fl

Switched Outlets

‡

AC Power Cord

°

Video 1 Inputs

·

Video 2 Play Inputs

a

Video Monitor Output

b

Remote Control Extension Output

c

Remote Control Extension Input

d

CD Input

e

Phono Input

f

Coax Digital Input

g

AC-3 RF Input

h

Front Channel Preamp Outputs

i

Front Channel Main In Amp Inputs

¡

Connect the AM

loop antenna supplied with the
receiver to these terminals. If an
external AM antenna is used, make
connections to the

and

terminals in accordance with the
instructions supplied with the
antenna.

™

Connect an indoor

or external FM antenna to this 
terminal.

£

These jacks may be used to connect
the center channel to an optional,
external power amplifier.

¢

These

jacks may be used to connect the
surround channels to an optional,
external power amplifier.

∞

Connect this

jack to the mono line level input of
an optional powered subwoofer, or
your optional external subwoofer
amplifier.

§

Connect the

ground wire from a turntable to this
terminal to reduce system hum.

¶

Connect the AC-3 RF output of an 
LV player equipped for digital audio
to this jack.

NOTE:

Do not connect standard

analog audio sources to these jacks
¶ f g.