Harman Kardon STRATOPHONIC Series User manual
AMES
COURT,
PLAINVIEW,
L.
I.,
N.Y.
fait
kardon
|
A
SUBSIDIARY
OF
THE
JERROLD
CORPORATION
90722322
INSTALLATION
AND
OPERATION
MANUAL
STRATOPHONIC
SERIES
MODEL
SR9YODOB
arigest-la
Kardon
|
SOLID-STATE
STEREOPHONIC
RECEIVER
SPECIFICATIONS
FOR
SRSOOB
STRATOPHONIC
RECEIVER
A.
Amplifier
Music
Power
Output
at
4
ohms
Full
Power
Bandwidth
Harmonic
Distortion
20--20KC
Mrequency
Response
*
{db
Damping
Factov
Square
Wave
Rise
‘Lime
{Yuin
and
Noise
Input
Sensitivity
Phono
Tape
Head
Auk,
Tone
Controls
Speaker
Inipedanice
High
Cut
Filter
Low
Cut
Hilter
100
watts
5-60
KC
Jess
than
0.2%
2-100
KC
AQti
22
us
945
db
2.5
Vv
2.9
TON
200
tiv
+14
db,
---L0
db
4.16
olims
-—
6
db
at
LO
KC
---
10
db
at
50
cps
B.
Tuner
Useable
Sensitivity
Image
Rejection
better
than
Spurious
Response
Rejection
better
than
Frequeney
Response
Distortion
beiter
(hai
Multiplex
Separation
Antenna
bapedance
C.
General
Input
Receptacles:
Mapnetic
Phono
Tape
Head
Ceramic
Phono
Auxiliary
Tape
Monitor
Output
Receptacles
Tape
Out
1.85
uv
710
db
85
db
#O.S
db
0.3%
AQ
db
300
ohing
~
I
“
Yniroduction
YOUR
NEW
STRATOPHONIC
RECEIVER
We
know
how
anxious
you
are
to
try
your
new
Stratophonic
Recciver.
But
a
few
cxtra
moments
of
paticnce
spent
in
carefully
reading
this
instruction
book
will
pay
vast
dividends
in
the
ultimate
enjoyment
of
your
component,
It
is
customary,
at
this
time,
to
congratulate
you
on
the
wise
decision
you
have
made
in
the
purchase
of
your
new
Stratophonic
Solid-State
Receiver.
This,
we
most
certainly
do.
You
should
also
know
that
it
is
the
culmination
of
several
years
of
intensive
research
in
solid-state
technology.
Your
Stratophonic
Receiver
is
literally
born
of
space-age
development,
Thus,
you
have
invested
in
the
finest
stereophonic
integrated
music
center
available.
It
truly
represents
the
state-of-the-art
in
its
ability
to
reproduce
life-like
music,
And,
because
of
advanced
solid-state
reliability
and
construction,
your
new
Stratophonic
Receiver
will
continue
to
provide
the
ultimate
subteltics
of
every
musical
nuance.
But,
this
alone
is
not
enough.
Your
new
Stratophonic
Receiver
has
also
been
designed
for
maximum
versatility.
The
simple
movement
of
a-switch
or
control
makes
you
master
of
every
program
source---tape,
disc
and
FM—mono
and
stereo,
And,
Harman-Kardon
designers
have
endeavored
to
make
your
Strato-
phonic
Recciver
a
major
asset
to
home
decor.
Now,
go
on
to
a
new
cxpericnce—Stratophonic
Sound—the
experience
of
hearing
music
as
you
have
never
heard
it
before.
KEEP
THIS
BOOK
AVAILABLE
AT
ALL
TIMES
FOR
IT
CONTAINS
INDISPENSABLE
TECHNICAL
AND
SERVICE
INFORMATION,
J
General
Information
UNPACKING
After
unpacking
the
SR900,
inspect
it
carefully
for
signs
of
transit
damage.
The
receiver
was
subjected
to
numerous
rigid
quality
control
inspections
and
therefore
should
be
in
perfect
operating
condition.
If
damage
1s
visible,
notify
your
dealer
at
once.
If
the
receiver
was
shipped
to
you,
notify
the
transportation
company.
Harman-Kardon
will
cooperate
with
you
in
such
instances,
but
please
note
that
only
you
can
recover
from
the
carrier
for
damages
incurred
during
shipment.
WARRANTY
POLICY
We
urge
you
to
fill
in
your
warranty
card
and
mail
it
to
the
factory
without
delay
to
protect
your
rights
under
warranty,
The
Haman-Kardon
warranty
is
not
valid
unless
we
have
your
card
on
file.
WARRANTY
We
warrant
each
$R900
to
be
free
from
defects
in
material
and
workman-
ship
under
normal
use
and
service,
and
in
accordance
with
the
conditions
herein
below
set
forth,
for
a
period
of
2
years
from
date
of
delivery
to
the
original
pur-
chaser,
and
agree
to
replace
or
repair
any
part
or
parts,
returned
to
us
within
said
2
years,
with
transportation
prepaid
and
which
our
examination
shall
disclose
to
our
satisfaction
to
have
been
thus
defective,
This
warranty
does
not
include
free
labor,
nor
is
it
applicable
to
any
instrument
which
shall
have
been
repaired
or
altered
in
any
way
so
as
in
our
judgment
to
affect
its
stability
or
reliability
nor
which
has
been
subject
to
neglect,
misuse,
abuse,
negligence
or
accident
-nor
which
has
had
the
serial
number
altercd,
effaced,
or
removed.
Neither
shall
this
warranty
apply
to
any
instrument
which
has
been
connected
otherwise
than
in
accordance
with
instructions
furnished
by
us.
os
This
warranty
is
expressly
in
lieu
of
all
other
warranties,
express
or
implied,
and
of
all
other
obligations
or
liability
on
our
part,
and
we
neither
assume
nor
authorize
any
representative
or
other
person
to
assume
for
us
any
other
liability
in
connection
with
the
sale
of
this
instrument.
SERVICE
POLICY
Harman-Kardon
has
established
a
special
consumer
division
to
answer
all
questions
pertinent
to
the
installation
and
operation
of
your
unit.
Please
feel
free
to
Z
write
us
at
any
time
and
we
will
endeavor
to
offer
prompt
and
complete
advice.
If
your
problem
cannot
be
resolved
through
our
combined
efforts
we
may
wish
to
refer
you
to
one
of
our
authorized
warranty
stations,
The
unit
must
be
shipped
via
Railway
Express,
Prepaid
to
the
station
designated,
accompanied
by
a
brief
note
describing
the
exact
nature
of
the
difficulty.
Under
no
circumstances
should
the
set
be
shipped
directly
to
the
factory
without
prior
authorization.
Ynstallation
Preece
VENTILATION
Sufficient
space
must
be
allowed
around
the
SR900
to
permit
unrestricted
air
flow
for
maximum
circulation.
This
will
insure
low
operating
temperatures
which
will
result
in
extended
component
life.
The
SR900
chassis
is
constructed
of
steel
together
with
a
heavy
gauge
aluminum
rear
panel
which
acts
as
a
heat
sink
(a
device
which
dissipates
heat)
for
the
output
transistors,
This
area
will
become
hot
under
normal
use.
This
is
normal
and
should
not
be
cause
for
concern.
Do
not
place
books
or
other
objects
on
the
cage
or
in
the
immediate
vicinity
of
the
receiver.
When
mounting
your
SR900
into
an
equipment
cabinet
the
following
precautions
must
be
observed.
1.
Allow
at
least
3
inches
above
the
top
cover
of
the
unit.
2.
Allow
at
least
1
inch
on
each
side
of
the
chassis.
3,
Cut
the
mounting
shelf
in
accordance
with
the
instructions
on
the
mounting
template.
4,
Leave
the
back
of
your
equipment
cabinet
open
to
insure
proper
venti-
lation.
POWER
REQUIREMENTS
Connect
the
AC
line
cord
into
any
outlet
furnishing
117
volts,
50
or
60
cycle
AC
current.
The
voltage
may
vary
between
105
and
125
volts.
An
AC
convenience
outlet
is
located
on
the
rear
panel
of
the
recciver.
This
outlet
is
“switched”
and
is
controlled
by
the
on/off
switch
on
the
front
panel.
Any
auxiliary
equipment
may
be
plugged
into
this
outlet.
The
rating
of
this
equipment
should
not
exceed
200
watts,
CONNECTING
THE
SPEAKERS
FOR
STEREO
OPERATION
(1
SYSTEM)
Your
two
speakers
should
be
identical,
if
possible,
to
obtain
optimum
results.
Experts
agree
that
a
perfectly
matched
system
offers
the
best
stereophonic
repro-
duction,
The
speakers
should
be
placed
along
the
same
wall
approximately
8
to
10
feet
apart
depending
upon
room
size
and
furniture
placement.
It
may
be
necessary
to
experiment
with
speaker
placement
until
best
results
are
obtained.
Use
any
type
of
wire
to
connect
your
speakers
to
the
SR900,
Lamp
cord
“Zin
cord”
is
excellent
and
may
be
easily
dressed
around
the
molding
for
an
inconspicuous
and
neat
installation.
Do
not
drive
the
staples
or
tacks
through
the
center
of
the
wire
for
this
may
short
out
the
two
sections
and
will
decrease
the
overall
volume
or
short
out
the
speakers
entirely.
It
is
permissible
to
use
approxi-
mately
50
feet
of
speaker
connecting
wire
for
each
speaker
without
loss
of
volume.
CONNECT
SPEAKERS
WITH
CARE.
AVOID
SHORTS-—-RECEIVER
HAS
BEEN
DESIGNED
TO
PREVENT
DAMAGE
FROM
ACCIDENTAL
SHORT-
ING;
HOWEVER,
REPETATIVE
SHORTING
CAN
DAMAGE
TRANSIS-
TORS.
1,
Connect
one
length
of
lamp
cord
to
the
left
speaker.
(This
is
the
speaker
on
your
left
as
you
face
the
speakers.
This
speaker
will
now
be
referred
to
as
Channel
A.)
2.
Attach
the
other
end
of
the
lamp
cord
to
the
terminals
marked
SYSTEM
1
CHAN
A
located
on
the
rear
of
the
SR900.
3,
Similarly
connect
another
length
of
lamp
cord
to
your
right
speaker.
(This
speaker
will
now
be
referred
to
as
Channel
B.)
en
|
CONNECT
SPEAKERS
WITH
A
6
CARE—AVOID
ACCIDENTAL
SHORTS
DIAGRAM
A
H907ZO6504
4.
Attach
the
other
end
of
the
lamp
cord
to
the
terminals
marked
SYSTEM
|
CHAN
B.
5.
Your
receiver
is
now
connected
for
|
system
stereo
operation
and
is
opera-
tive
when
the
speaker
selector
switch
on
the
front
panel
is
in
the
System
1
or
System
1
&
2
position.
SPEAKER
PHASING
When
more
than
one
speaker
is
used
in
any
music
reproducing
system
the
speakers
must
be
connected
in
a
manner
to
work
together
rather
than
work
out
of
phase.
If
one
speaker
is
pushing
air
out
while
the
other
is
moving
in
the
opposite
‘direction
this
will
result
in
diminishing
bass
response.
Checking
for
proper
phase
and
correcting
if
necessary
is
quite
simple.
1.
Place
a
stercophonic
recording
on
your
record
player.
2.
Pull
the
“Stereo-Mono”
switch
on
the
BALANCE
control
to
its
“Out”
position
for
monophonic
playback.
3.
Play
the
record.
The
sound
should
emerge
from
approximately
the
center
area
between
the
two
speakers.
4.
While
the
record
is
playing
push
the
“Stereo-Mono”
switch
“In”
to
the
stercophonic
position.
5.
The
sound
should
now
move
across
the
wall
of
the
room
and
should
appear
to
come
from
both
speakers
as
well
as
the
center.
6.
If
your
speakers
are
out
of
phasc,
the
sound
source
will
not
pinpoint
itself
between
the
two
speakers
when
the
Sterco-Mono
switch
is
in
the
monophonic
position.
Instead
it
will
appear
to
come
from
both
sides.
If
the
speakers
are
out
of
phase,
turn
off
the
receiver
and
disconnect
both
leads
from
either
the
left
or
right
speaker
and
reverse
them.
Your
system
will
now
be
in
phase.
This
completes
your
speaker
connections.
The
SR900
is
a
solid
state
device
which
does
not
contain
audio
output
transformers,
It
is
therefore
not
necessary
to
match
the
impedance
of
your
speakers
to
the
receiver.
The
SR900
will
per-
form
perfectly
with
any
speaker
which
has
an
impedance
of
4,
8
or
16
ohms.
CONNECTING
THE
SPEAKERS
FOR
STEREO
OPERATION
(2
SYSTEMS)
{.
Connect
all
4
speakers
for
your
two
system
operation
as
shown
in
Diagram
B.
2.
You
may
now
select
either
system
1,
system
1
and
2
or
system
2
by
the
use
of
the
“Speaker
Selector
Switch”
on
the
front
panel.
CONNECT
SPEAKERS
WITH
CARE—AVOID
ACCIDENTAL
SHORTS
\
|
DIAGRAM
B
\
OC
SYSTEM
}
A
H90720649A
NOTE:
WHEN
ALL
THE
SPEAKERS
USED
IN
YOUR
2
SYSTEM
CON.
NECTION
ARE
4
OHMS,
CONNECT
A
2
OHM,
10
WATT
RESISTOR
IN
SERIES
WITH
THE
HOT
SIDE
OF
EACH
OF
THESE
SPEAKERS,
(IF
TWO
OF
THE
SPEAKERS
ARE
4
OHMS
AND
2
OF
THE
SPEAKERS
ARE
ANY
HIGHER
IMPEDANCE
THIS
PRECAUTION
IS
NOT
NECESSARY.)
CONNECTING
THE
SPEAKERS
FOR
MONOPHONIC
OPERATION
(1
SYSTEM)
If
the
SR900
is
to
be
used
monophonically
and
stereo
is
to
be
added
at
a
later
date,
it
is
essential
that
both
speaker
output
terminals
are
terminated
into
a
propcr
load
to
prevent
damage
to
the
output
stage
of
the
receiver.
Refer
to
Dia-
gram
C
for
proper
installation
of
the
loading
resistor.
At
no
time
should
the
output
terminals
be
paralleled
for
monophonic
operation!
THIS
IS
THE
ONLY
CORRECT
METHOD
FOR
CONNECTING
ONE
SPEAKER
TO
THE
SR900
a
CONNECT
SPEAKERS
WITH
CARE—AVOID
ACCIDENTAL
SHORTS
DIAGRAM
C
es
HOO7Z065IA
CONNECTING
THE
SPEAKERS
FOR
MONOPHONIC
OPERATION
(2
SYSTEMS)
If
the
SR900
is
to
be
used
monophonically
and
stereo
is
to
be
added
at
a
later
date,
it
is
essential
that
both
speaker
output
terminals
are
terminated
into
a
proper
load
to
prevent
damage
to
the
output
stage
of
the
receiver.
Refer
to
Dia-
gram
D
for
proper
installation
of
the
loading
resistors.
At
no
time
should
the
output
terminals
be
parelleled
for
monophonic
operation!
THIS
IS
THE
ONLY
CORRECT
METHOD
FOR
CONNECTING
TWO
SPEAKERS
MONOPHONICALLY
TO
THE
SR900
CONNECT
SPEAKERS
WITH
CARE—AVOID
ACCIDENTAL
SHORTS
SYSTEM
|
\
DIAGRAM
D
HS0720652A
CONNECTING
THE
SPEAKER
FOR
STEREOPHONIC
OPERATION
(SYSTEM
1)
AND
MONOPHONIC
OPERATION
(SYSTEM
2)
CONNECT
SPEAKERS
WITH
CARE—AVOID
ACCIDENTAL
SHORTS
\
SYSTEM
2
H9O0S20653A
STEREO
HEADPHONE
RECEPTACLE
The
stereo
headphone
receptacle
located
on
the
front
panel
will
accept
any
headphone
with
any
impedance
rating,
To
activate
the
headphone
receptacle,
the
Speaker
Selector
switch
must
be
in
the
“Phones”
position.
For
speaker
operation,
throw
the
Speaker
Selector
switch
to
cither
the
system
1,
1
and
2
or
2
positions,
depending
on
the
number
of
speakers
connected
in
your
system,
CONNECTING
THE
FM
ANTENNA
Due
to
the
exceptionally
high
sensitivity
of
the
SR900
the
folded
dipole
supplied
with
the
receiver
is
sullicient
for
all
but
the
most
difficult
locations,
‘The
balanced
antenna
input
is
designed
to
accept
a
300
ohm
antenna,
indoor
or
outdoor
type.
When
using
the
antenna
supplied,
spread
the
dipole
so
that
it
forms
a
“I”
shape,
The
stem
of
the
“IT”
ends
in
two
screw
terminal
connections,
and
these
should
be
connected
to
the
300
ohm
and
GND
terminals
on
the
Antenna
Terminal
Strip.
Horizontal
placement
of
the
antenna
offers
maximum
polarization
for
optimum
reception.
The
antenna
may
be
tacked
to
the
back
of
your
hi-fi
cabinet,
to
the
molding
behind
the
equipment
or
to
the
shelf
you
use,
Use
ordinary
tacks
through
the
center
portion
of
the
antenna
leads
to
avoid
shorting
out
the
antenna.
In
more
remote
locations,
an
outside
Yagi,
folded
di-pole
or
omni-directional
antenna
is
recommended
(Jerrold/Taco
FMP
8,
FMP
10,
FMP
16,
CM677).
For
the
greatest
gain,
an
8
to
14
element
Yagi
designed
for
the
FM
band
is
suggested.
A
Yagi,
however,
is
very
directional
and
it
may
be
desirable
to
use
an
antenna
rotor
if
a
full
360°
coverage
is
required.
For
reception
in
the
suburbs,
an
outside
folded
di-pole
or
omni-directional
di-pole
is
recommended.
CONNECTING
A
STEREO
RECORD
PLAYER
—
(MAGNETIC
PICKUP)
Connect
both
leads
from
your
record
player
to
the
CHAN
A
and
CHAN
B
PHONO
LO
input
receptacles
on
the
rear
of
the
SR900
chassis.
If
your
record
player
has
a
special
ground
wire
emerging
with
the
two
input
leads,
conncct
this
ground
wire
to
the
special
GND
terminal
on
the
rear
panel.
CONNECTING
A
STEREO
RECORD
PLAYER
—
(CRYSTAL
OR
CERAMIC
PICKUP)
Connect
both
leads
from
your
record
player
to
the
CHAN
A
and
CHAN
B
PHONO
HI
input
receptacles.
There
is
usually
no
ground
lead
emerging
from
the
record
player
when
a
ccramic
or
crystal
cartridge
is
uscd.
However,
if
your
record
player
does
use
a
ground
lead,
connect
it
to
the
special
GND
terminal
located
on
the
rear
panel.
CONNECTING
A
MONOPHONIC
RECORD
PLAYER
Connect
the
single
lead
from
your
monophonic
record
player
to
either
the
A
or
B
PHONO
LO
input
if
your
player
uscs
a
magnetic
pickup,
or
to
the
A
or
B
PHONO
HI
input
if
it
uses
a
ceramic
or
crystal
pickup.
10
CONNECTING
A
STEREO
TAPE
DECK
A
stcreophonic
tape
deck
has
two
output
leads.
Connect
these
leads
to
the
CHAN
A
and
CHAN
B
TAPE
HEAD
input
receptacles
on
the
rear
of
the
receiver.
Should
you
desire
to
play
back
a
monophonic
tape
on
your
stereophonic
tape
deck,
throw
the
VUNCTION
SWITCH
to
the
TAPE
HEAD
MONO
position.
CONNECTING
A
MONOPHONIC
TAPE
DECK
Connect
the
shielded
lead
from
your
tape
deck
to
the
CHAN
A
‘TAPE
HEAD
input
receptacle
on
the
rear
of
the
rceciver
and
throw
the
FUNCTION
switch
to
the
TAPE
HEAD
MONO
position.
CONNECTING
A
STEREO
TAPE
RECORDER
Since
most
stereo
tape
recorders
include
their
own
record
and
playback
pre-amplificrs,
it
is
not
desirable
to
connect
the
output
of
the
recorder
into
the
TAPE
HEAD
or
any
of
the
other
low
level
input
receptacles.
This
will
result
in
overloading
of
the
low
level
stage
and
cause
distortion.
Connect
the
two
tape
recorder
output
leads
to
the
CHAN
A
and
CHAN
B
AUX
receptacles
on
the
rear
panel
of
the
receiver.
‘This
will
enable
you
to
play
back
your
stereo
tapes.
To
make
a
recording,
connect
the
inputs
of
your
recorder
to
the
CHAN
A
and
CHAN
B
TAPE
OUT
receptacles.
This
will
enable
you
to
make
a
stcreo-
phonic
recording
with
the
proper
recording
cqualization
as
determined
by
your
recorder,
while
simultancously
listening
to
the
program
material
through
your
speaker
system.
The
recording
signals
from
the
TAPE
OUT
receptacles
are
unaffected
by
the
tone
controls
or
volume
setting
of
the
SR900
to
insure
an
abso-
lutely
flat
response.
CONNECTING
A
MONOPHONIC
TAPR
RECORDER
If
a
monophonic
tape
recorder
is
to
be
used
with
the
SR900,
connect
the
recorder
output
to
either
the
CHAN
A
or
CHAN
B
AUX
input
receptacle
located
on
the
rear
pancl.
This
will
enable
you
to
play
back
your
monophonic
tapes.
If
your
recorder
is
sterco
playback
but
records
monophonically,
connect
the
output
as
described
in
the
previous
section
on
connecting
a
sterco
tape
recorder.
Connect
the
input
for
recording
monophonically
as
described
betow.
Connect
the
input
of
your
recorder
to
either
the
CHAN
A
or
CHAN
B
TAPE
OUT
receptacle,
This
will
enable
you
to
record
monophonically
while
simultancously
listening
to
the
program
through
the
recciver
and
speakers.
TO
MONITOR
YOUR
TAPES
WHILE
RECORDING
Connect
the
monitoring
head
of
your
tape
recorder
to
the
TAPE
MON
recep-
tacles
on
the
rear
of
the
recciver
chassis,
Connect
in
accordance
with
the
instruc-
‘tions
supplied
by
the
recorder
manufacturer.
11
Opera
tion
Procedure
kivery
control
on
this
receiver
serves
a
specific
useful
function
and
is
im-
portant
for
the
proper
operation
of
your
sterco
system.
Jt
is
important
to
note
that
under
no
circumstances
should
this
receiver
be
operated
without
either
a
speaker
or
resistive
load
across
both
the
output
terminals,
ON/OFF
SWITCH
The
illuminated
push-button
power
switch
is
located
in
the
lower
left
hand
corner
of
the
receiver.
Depress
the
amber
button
to
turn
the
receiver
on,
Depress
sv
to
turn
the
receiver
off.
When
the
receiver
is
on,
the
push-button
will
glow
softly,
TUNING
CONTROL
‘The
TONING
CONTROL
is
located
directly
to
the
right
of
the
dial
glass
and
is
used
to
select
the
desired
FM
station.
TUNING
METER
_
The
SR900
incorporates
a
D’Arsonval
movement
tuning
meter
for
precise
tuning.
The
TUNING
METER
is
used
to
tune
to
the
center
of
the
station
channel
and
proper
tuning
is
achicved
when
you
are
on
a
station
and
the
TUNING
METER
is
at
maximum.
VOLUME
CONTROL
The
VOLUME
CONTROL
on
the
$R900
is
essentially
two
controls
in
one,
mechanically
tied
together,
to
be
operated
by
onc
knob.
The
volume
control
varies
both
channels
simultaneously
and
is
used
to
adjust
the
volume
level
of
program
material
fed
into
the
sterco
system.
Its
effect
can
be
modificd
by
the
special
Harman-Kardon
CONTOUR
switch.
12
BALANCE
CONTROL
The
nature
of
stereophonic
reproduction
is
such
that
it
requires
two
identical
channels
to
attain
the
highcst
degree
of
faithfulness
and
spatial
distribution.
Any
variation
in
the
cfliciency
of
one
channel
as
compared
to
the
other
will
disturb
this
relationship.
As
there
may
be
slight
differences
between
the
two
speakers,
tape
heads,
cartridge
coils,
ctc.,
the
SR9O0
includes
a
special
control
to
balance
one
channel
against
the
other,
Suflicient
range
is
covered
by
this
contro]
to
permit
rebalancing
of
the
overall
system
even
in
extreme
cases
where
unbalance
exists.
It
should
be
noted
that
the
BALANCE
control
may
be
set
anywhere
within
its
range
of
adjustment
to
attain
system
balance.
BASS
AND
TREBLE
TONE
CONTROLS
The
BASS
and
TREBLE
tone
controls
on
the
SR900
provide
the
full
range
of
tonal
adjustment
necessary
for
stereo
high
fidelity
listening.
The
tone
control
range
is
considerable
and
can
adequately
adjust
the
low
and
high
frequencies
in
accordance
with
your
listening
preference,
speaker
characteristics
and
room
acoustics.
FUNCTION
SELECTOR
SWITCH
The
FUNCTION
SELECTOR
switch
selects
the
desired
type
of
prograin
source,
The
switch
on
the
$R900
has
six
switching
positions,
i.
TAPE
HD
MONO.
This
position
selects
your
tape
deck
for
monophonic
playback,
and
includes
NARTB
equalization,
2.
TAPE
HD
STEREO.
This
position
sclects
your
tape
deck
for
sterco-
phonic
playback
and
also
includes
NARTB
equalization.
3,
PHONO.
This
position
selects
your
record
player
(magnetic,
crystal
.or
ceramic
pickup)
for
playback
and
includes
RIAA
equalization,
4.
FM
MONO/STEREOLOGIC,
This
is
the
normal
listening
position
for
all
monophonic
and
stereophonic
FM
broadcasts.
In
this
position
the
Stereo
{ndicator
Light
and
the
automatic
switching
circuit
built
into
your
receiver
are
operative.
|
5.
FM
STEREO.
This
position
selects
FM
stereo
without
the
automatic
switching
circuit,
|
6.
AUX.
This
position
selects
any
high
level
equipment,
such
as
an
AM
tuner,
the
output
of
your
television
sct
or
any
other
high
level
signal
which
is
connected
to
the
AUX
receptacles
on
the
rear
of
the
receiver.
{3
SPEAKER
SELECTOR
SWITCH
The
Speaker
Selector
Switch
is
a
4
position
switch
which
selects
between
headphone
or
speaker
operation.
It
permits
the
connection
of
2
complete
speaker
systems
(system
1,
system
|
and
2,
or
system
2).
For
additional
information
sce
the
paragraphs
on
speaker
connections.
CONTOUR
SWITCH
One
of
the
limitations
of
human
hearing
is
its
tendency
to
lose
sensitivity
to
the
very
low
pitched
sounds
as
the
program
sound
level
is
reduced.
It
is
this
characteristic
(known
as
the
Fletcher-Munson
cffect)
which
causes
one
to
play
inusic
programs
at
high
listening
levels
in
order
to
experience
the
full
rich
tone
available
from
fine
modern
recordings.
The
Harman-Kardon
CONTOUR
switch
compensates
for
this
effect;
thereby
eliminating
high
listening
levels
as
a
requisite
for
full
enjoyment
of
reproduced
music,
For
warm,
full-bodied
reproduction
at
low
listening
Icvels,
throw
the
CONTOUR
switch
“IN”,
At
high
levels,
the
contour
switch
nas
no
effect.
TAPE
MONTFOR
SWITCH
If
your
tape
recorder
has
a
special
monitoring
head,
throwing
this
switch
to
the
“IN”
position
will
enable
you
to
listen
to
your
tapes
a
second
altcr
they
are
recorded.
When
not
in
use
this
switch
must
be
in
the
“OUT”
position,
LOW
CUT
SWITCH
At
times,
record
changers,
turntables
and
even
some
I'M
stations
produce
an
objectionable
low
frequency
signal
that
is
strong
enough
to
be
introduced
into
the
playback
system.
This
is
knowa
as
rumble
and
can
be
cancelled
out
by
the
cal
low
frequency
cut
off
filter
network
included
in
this
receiver,
Whenever
rumble
is
present
throw
the
LOW
CUT
switch
“IN”.
HIGH
GUT
SWITCH
In
the
event
of
objectionable
high
frequency
scratch,
throw
the
HIGH
CUT
switch
located
on
the
front
panel
“IN.”
‘This
will
roll
off
the
higher
frequencies
and
will
clear
up
the
program
material
considerably,
‘This
switch
may
also
be
used
when
listening
to
FM
reception.
It
may
be
useful
when
listening
to
a
stereophonic
FM
broadcast
which
1s
slightly
noisy,
Throwing
the
FUGH
CUT
switch
“IN”
will
eliminate
the
noise.
14
TONE
CONTROL
SWITCH
This
switch,
when
in
the
“OUT”
position
completely
defeats
the
tone
control
circuit
to
provide
absolutely
flat
response.
When
activated
the
tone
controls
are
“IN”
the
circuit
and
can
be
adjusted
to
your
own
listening
preference.
MUTING
SWEPCH
The
purpose
of
the
muting
circuit
is
to
reduce
audible
noise
when
tuning
from
station
to
station.
Since
very
weak
signals
may
be
muted
at
the
same
time,
the
front
panel
MUTING
switch
may
be
used
to
defeat
the
muting
circuit
on
weak
signals.
To
reduce
interstation
noise,
throw
the
MUTING
‘switch
“ON”,
To
defcat
the
circuit,
throw
the
switch
“OFF”.
STEREO-MONO
SWITCH
The
STEREO-MONO
switch
is
physically
located
as
a
“PUSH-PULL”
function
on
the
“BALANCE”
control.
When
the
switch
is
in
the
“IN”
position
the
reeciver
is
operating
stereo-
phonically.
When
the
switch
is
pulled
to
the
“OUT”
position
the
receiver
is
operating
monophonically,
This
position
may
be
used
when
listening
to
monophonic
records,
or
when
it
is
desired
to
reproduce
a
stereo
program,
such
as
an
FM
stereo
broadcast,
monophonically,
SELECTING
MONOPHONIC
OR
FIM
STEREO
BROADCASTS
Under
normal
use,
the
FUNCTION
selector
switch
should
be
placed
in
the
FM
MONO/STEREOLOGIC
position.
If
the
recciver
is
tuned
to
a
monophonic
FM
broadcast,
the
special
STEREO
LOGIC
circuit
will
automatically
defeat
the
multiplex
circuitry
and
the
tuner
will
reproduce
monophonic
sound
through
both
channels.
Should
this
station
begin
to
transmit
sterco,
the
logic
circuit
will
automatically
switch
in
the
multiplex
section
and
you
will
receive
the
broadcast
in
full
stereophonic
sound.
Should
the
station
conclude
broadcasting
in
sicreo,
your
SR900
recciver
will
automatically
switch
back
to
monophonic
reception.
The
exclusive
Harman-Kardon
logic
circuit
is
always
operative
—--cven
as
you
tune
across
the
FM
dial.
As
you
tune
to
a
stcreophonic
broadcast,
the
logic
circuit
automatically
switches
your
reeciver
to
the
stereophonic
mode
of
operation
-—
and
back
to
monophonic
as
the
sterco
station
is
passed.
15
Should
you
receive
a
weak
stereo
signal
whose
quality
has
been
degraded
by
noise
or
excessive
multipath,
the
special
STEREO
LOGIC
circuit
will
auto-
matically
change
the
mode
of
operation
of
the
recciver
to
monophonic
enabling
it
to
reproduce
an
undistorted
signal.
Should
you
desire
to
listen
to
this
stereo
broad-
cast
in
spite
of
noise
and
degraded
tone
quality,
place
the
function
sclector
switch
in
the
FM
STEREO
position,
‘This
defeats
the
STEREOLOGIC
circuit.
STEREO
INDICATOR
LIGHT
A
sterco
indicator
light
is
located
directly
behind
the
FM
dial
glass
and
operates
in
conjunction
with
the
STEREOLOGIC
circuit.
The
light
visually
indi-
cates
the
reproduction
of
stereo
through
your
receiver.
AUTOMATIC
STEREO
ADJUST
CONTROL
This
control,
located
on
the
rear
panel,
has
been
factory
adjusted
and
should
not
require
further
readjustment.
It
adjusts
the
level
at
which
the
automatic
logic
circuit
will
switch
your
receiver
from
stereophonic
to
monophonic
operation.
If
it
is
necessary
to
re-adjust
this
control
the
following
procedure
should
be
followed.
Tune
to
the
weakest
stereo
station
which
you
desire
to
hear
stereo-
phonically.
Slowly
rotate
the
automatic
stereo
adjust
control
counter-clockwise
to
the
point
at
which
the
sterco
indicator
light
on
the
front
panel
gocs
out.
Then,
slowly
rotate
the
control
clockwise
to
the
point
at
which
the
light
gocs
on,
This
is
the
point
at
which
the
control
should
be
set.
INTERCHANNEL
MUTING
THRESHOLD
ADJUSTMENT
This
control
is
located
on
the
rear
of
the
chassis
and
should
be
adjusted
as
follows:
Tune
in
the
weakest
station
in
your
arca
with
the
front
panel
FM
Muting
switch
in
the
“OFF”
position.
Tune
off
the
station
and
throw
the
FM
Muting
Switch
“ON”,
Rotate
the
“Muting
Adjustment”
clockwise.
Then
rotate
counter-
clockwise
until
only
a
faint
hiss
is
heard.
Tune
in
again
to
the
weak
signal.
If
it
still
can
be
heard,
and
noise
present
off
station
is
negligible,
the
adjustment.
can
be
considered
satisfactory.
NOTE:
Maximum
sensitivity
is
obtained
with
the
FM
Muting
Switch
in
the
“OFF”
position.
16
Special
Sechn
teat
Ynformat
(On
DIAL
SCALE
The
SR900
Dial
Scale
is
marked
with
two
scales,
a
frequency
scale
(88-
108
MC),
and
a
logging
scale
(0-100).
Since
most
FM
stations
operate
on
fre-
quencies
which
are
not
whole
numbers
(such
as
96
MC
as
compared
to
96.3)
ideally
each
megacycle
division
on
the
frequency
scale
should
be
divided
into
10
parts
to
cnable
the
user
to
pinpoint
the
location
of
the
station,
This
wouid
require
a
dial
scale
which
would
be
longer
than
the
front
panel.
The
logging
scale
which
is
divided
into
100
equal
parts
provides
a
means
of
finding
your
favorite
station,
once
you
have
noted
its
position
on
the
logging
scalc.
For
example,
in
New
York
City,
WOXR
operates
on
96.3MC.
After
locating
this
station
through
the
use
of
the
frequency
scale
(between
96
and
98
MC),
you
find
that
the
pointer
falls
on
46
on
the
logging
scale.
Make
a
note
of
this
setting
and
when
you
next
want
to
tunc
to
WOXR,
all
that
is
necessary
is
to
set
the
pointer
to
46
on
the
logging
scale.
EQUALIZATION
In
order
to
achieve
good
reproduction
of
the
wide
range
of
frequencies
in
music
and
to
make
necessary
adjustments
for
the
limitations
of
the
recording
technique,
record
manufacturers
have
found
it
necessary
to
modify
the
actual
frequency
response
of
the
music
while
it
is
being
recorded.
‘Thus,
to
avoid
over-
cutting
and
consequent
distortion,
a
measured
and
deliberate
reduction
is
effected
in
low
frequency
response
by
selecting
a
“turnover
frequency”
and
by
recording
attenuated
response
below
that
point.
To
assure
optimum
signal
to
noise
at
the
high
frequency
end
when
the
record
is
played
at
home,
the
highs
are
dcliberately
exaggcrated
during
the
recording
process.
A
measured
and
deliberate
boost
is
effected
above
a
certain
frequency.
This
combination
of
deliberate
exaggeration
at
the
low
and
high
ends
of
the
frequency
response
can
be
expressed
in
a
recording
curve,
When
the
record
is
played
a
mirror
image
of
that
curve
should
be
available
so
that
the
ideal
“flat”
response
may
be
achieved,
The
TAPE
HD
and
PHONO
positions
of
the
Function
Selector
automatically
select
the
proper
equalization
that
is
required.
\/
HUM
AND
NOISE
In
any
high
fidelity
installation,
hum
may
be
caused
by
the
interconnection
of
a
record
player,
tuner
and
amplifier,
as
a
result
of
the
cables
and
different
grounds,
If
hum
is
experienced
with
the
SR900,
disconnect
everything
but
the
speakers
from
the
receiver.
If
hum
persists,
reverse
the
AC
line
cord.
Plug
in
the
record
player
and
if
hum
appears,
reverse
the
record
player
power
plug
and
connect
a
single
lead
from
the
record
player
chassis
to
the
ground
post
on
the
rear
of
the
receiver
chassis.
Connect
your
other
devices
in
this
manner.
CAUTION:
Hum
may
be
also
induced
by
defective
connecting
cables
or
by
running
these
cables
too
close
to
a
strong
AC
field.
FUSES
The
SR900
uses
three
fuses
to
protect
its
circuits.
The
main
fuse
labeled
LINE
is
used
to
protect
the
entire
receiver
while
the
other
two
fuses
labeled
SPEAKER
FUSE
CHAN
A
and
SPEAKER
FUSE
CHAN
B
are
used
to
protect
the
output
power
transistors.
In
the
event
of
fuse
failure
replace
ONLY
with
the
same
type
used.
Replacing
with
a
fuse
of
a
higher
rating
will
not
protect
the
instrument
and
may
result
in
severe
damage.
Line
Fuse—3
Amp—3AG
Chan
A
Fuse—2¥2
Amp-—3AG
Chan
B
Fuse---2¥2,
Amp—-3AG
SERVICE
If
this
instrument
should
not
perform
properly
during
the
first
two
years
after
date
of
purchase,
contact
the
factory
for
instructions.
The
factory
has
many
authorized
warranty
service
stations
in
the
United
States,
and
for
the
station
nearest
you,
please
write
our
Customer
Scrvice
Department,
Harman
Kardon,
Inc.
Plainview,
Long
Island,
New
York.
Be
sure
to
include
the
model
and
serial
number
of
the
unit.
A
brief
description
of
your
other
components
is
often
of
help
in
answering
your
questions.
DO
NOT
return
this
instrument
to
Harman
Kardon
without
first
receiving
authorization.
18
ParT
NUMBER
1165420404
H66016206
H65410901
H53012756
C65416751
H61220382
H46512117
H65420331
1161021529
H60720392
H280205
12
H60120365
H63420092
H60120364
H63020300
H63220287
H63220286
163220285
25520184
H24020203
H21520316
H2.1520316
H22020375
H24020314
1122020317
H23520388
H23520388
H25017216
110121377
H10520420
H31120396
H3
1320395
1131321376
H31519981
31520461
1130821497
REPLACEMENT
PARTS
LIST
—
SR900B
DESCRIPTION
Phono
Jack
Transistor
Socket
Fuse
Holder
Line
Cord
AC
Convenience
Outlet
Pilot
Light
Socket
Pilot
Light
#1847
Headset
Jack
Dial
Glass
Pointer
Terminal
Board
(No
Components
)
Bottom
Plate
Jewel
Top
Cover
Escutcheon
Knob,
Small
Knob,
Medium
Knob,
Large
Rocker
Switch
Speaker
Selector
Switch
Bass
Control
Treble
Control
Balance
Control
Function
Switch
(No
Components
)
Volume
Control
Stereo
Threshold
Control
Muting
Adjust
Control
Power
Switch
Power
Transformer
Driver
Transformer
Electrolytic
3000
MED.
30V.
List
PRICE
AS
«LS
85
.60
A
os)
20)
80
1.95
oo
30
5.30
20
4.30
13:79
.65
70
7.)
1.30
1.95
he)
D5
pee)
7.60
3.45
10
10
.60
L63i5
5,20
3200
Electrolytic
3000/30V,
200/30V,
200/18V.
4.00
Electrolytic
400/60V,
1000/50V,
200/45V
3.45
Electrolytic
25
MFD/30V
Non-Polarized
Electrolytic
2
MFD/25V
Non-Polarized
Condenser,
Variable
19
05
Wd
3.50
Parr
NUMBER
1100321498
L{4.1020413
141013566
1142020414
H41520419
H41514016
1142018109
£1430215
7/9
114302.1083
1143021017
${43020504
1143020435
1143020735
14302073
1
HL
1016947
H11016946
111020465
111202042]
F1
2020422
1112020423
171309
10688
123520507
1136520516
H4501329]
145013895
H12520334
1190721328
H43022
134
Lif
1022133
DESCRIPTION
Pre-Selector
Diode
10
Aunp
-~-
LOOV
Diode
.75
Amp
-—-
100
V
Diode
Zener
Diode
Diode
(Matched
Pair)
(pr)
Diode,
Zener
‘Transistor
‘Transistor
Transistor
‘Transistor
‘Lransistor
‘Transistor
"Lransistor
PM.
IF
Vransformer
VM
Ik
‘ransformer
IME
Ratio
Detector
[OKC
‘Transformer
38iC
‘Cransformer
SCA
Filter
Trimmer
1-10
MME
Control,
2500
Ohm
‘Trim
0.27
Ohin
2
Watt
10%
Resistor
Vuse
3
Amp
Fuse
24
Amp
Meter
Instruction
Book
Transistor
Transformer
(Balun)
List
Prick
7.05
2,10
ey
1.65
1.50
1.70
eas
6.50
1.50
1.40
AAQ
ZO,
2.60
1.65
1.65
2.710
ee
3.85
Be
AO
1,10
20
ms)
5
7.50
2.50
8.75
80
NOTE:
‘To
speed
handling
of
your
order
be
sure
to
include
both
the
model
and
serial
numbers
which
appear
at
the
back
of
the
chassis,
in
addition
to
the
quantity,
part
number
and
part
description
of
the
items
ordered.
Orders
from
independent
dealers,
independent
servicemen,
and
retail
customers
will
be
shipped
on
a
C.O.D.
basis
except
for
orders
$1.00
or
less,
for
which
remittance
should
be
enclosed.
Prices
subject
to
change
without
notice.
Harman-Kardon
reserves
the
right
to
substitute
equivalent
parts
for
those
originally
installed
in
this
chassis.
20
This manual suits for next models
1
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