INST
ALLA
Tl
ON
VENTILATION
Although your new receiver rarely
develops
high
heat,
it
is
recommended
that
you
leave
the
back
of
the
cabinet
open.
If
this
is
not possible, provide
several
large
holes
or
slots
as
low
and
as
high up
in
the
cabinet
back
as
possible.
As
an
alternative, holes may
be
provided
in
the
sides, bottom
or
top
of
the
cabinet.
Remember
that
really effective ventilation requires provision
for
cool
air
to
enter
at
the
bottom
and
hot
air
to
leave
at
the
top.
A minimum
clearance
of
two (2) inches should
be
allowed
on
each
side
and
in
the
rear,
between
the
chassis
and
the
cabinet,
and
three
(3) inches
are
required
above
it.
Isolate
any
accessories
which might interfere with ventilation. For
example,
do
not
drape
plastic
or
rubber
covered
interconnecting
cables
over
the
equip-
ment.
POWER
REQUIREMENTS
Connect
the
AC line
cord
to
any
outlet furnishing
117
volts,
60
Hz
AC
current. The
voltage
may
vary
between
105
and
125
volts. Two auxiliary
AC
power
outlets
are
provided
on
the
rear
panel
of
your receiver,
one
being
live
at
all times (unswitched)
and
the
other
being
live only when
the
power
switch
is
on (switched). Any
accessory
equipment
(tape
recorder,
phonograph
record
player,
etc.) may
be
connected
to
these
receptacles.
Only
those
connected
to
the
switched
receptacle
will
be
controlled by
the
POWER switch on
the
front
panel.
FUSING
A fuse
is
a
safety
device used to
protect
the
receiver
against
possible
damage
due
to
overload
or
short circuits. The
100
+ receiver employs five
protective fuses.
All
five
are
located
on
the
rear
panel.
The
AC
fuse
labeled
4A-3AG
is
used to
protect
the
power
supply
of
the
entire
system. The
other
four fuses
labeled
4A-3AG
LEFT,
RIGHT,
FRONT
and
BACK,
protect
the
output
stages
of
the
receiver.
The
output
of
your receiver
has
been
designed
to
operate
with a
MAXI-
MUM
of
5.0
amperes
of
current
in
each
channel.
Under certain conditions, it
is
possible
to
draw
more
than
5.0
amperes
through
the
output
stage
which
would,
in
turn, blow
the
speaker
fuses.
This
could
be
caused
by using multiple
speaker
systems
where
the
total
impedance
falls
below
4 ohms. (See
SPEAKER
IMPEDANCE).
In
the
event
of
fuse failure,
replace
ONLY
with
the
same
fuse
type
used.
NEVER
replace
with a fuse
of
a
higher
roting. To
do
so
will
NOT
protect
your
receiver
and
could result
in
severe
damage
to
it
which
will
not
be
covered
under
the
warranty
policy.
SPEAKER
PLACEMENT
(See
Fig.
1)
The
speakers
will
be
referred
to
as
LEFT
and
RIGHT,
FRONT
and
BACK.
Placement
of
the
back
speakers
will
vary
with
your
room size,
seating
arrange-
ment
and
acoustics. At times,
it
may
be
advantageous
to
place
the
back
2
speakers
in
line with
the
listener,
either
aiming them
at
the
listener,
the
rear
of
the
room
or
against
the
side
wall.
It
has
been
acknowledged
that
omni-
directional
speakers
(i.e.
Harman/Kardon
HK50)
serve
well
as
back
speakers
in
a 4-CH
setup
because
they
do
not
beam
the
sound
at
the
listener. This gives
the
illusion
of
far
greater
airiness
and
comes closer to
the
sound
at
a live con-
cert.
We
have
illustrated several ways
of
arranging
the
back
speakers.
Some
experimentation
may
be
required
before
you
obtain
optimum sound dispersion
and
total surround
sound.
If you listen predominantly to classical music
it
is
recommended
to
reflect
the
back
speakers
off
the
walls,
or
aim them
away
from
the
listener. This
will
tend
to soften
the
sound
and
create
a more
natural
ambience.
If
you listen
predominantly
to
contemporary
music
it
may
be
advan-
tageous
to
place
the
back
speakers
in
the
corners
and
beam
them into
the
room.
CONNECTING
THE
SPEAKERS
Use
any
type
of
wire
to
connect
your
speakers
to your receiver. However,
it
should
be
pointed
out
that
the
heavier
the
wire,
the
lower
the
loss
of
power.
Ordinary
lamp
cord,
or
zip
cord
as
it
is
sometimes
called,
is
excellent
for
this
application
since
it
can
be
dressed
easily
around
the
molding
and
it
is
usually
heavy
enough
to
extend
great
lengths without
an
appreciable
loss
in
power.
Do
not drive tacks
or
staples
through
the
center
of
the
wire since this
can
result
in
a short circuit which would
either
cut
the
volume level
down
considerably
or
short out
the
sound completely.
It
is
permissible
to
use
approximately
50-60
feet
of
heavy
gauge
speaker
connecting wire for
each
speaker
without loss
of
volume.
CONNECT
YOUR
SPEAKERS
WITH
CARE,
AVOID SHORTS. DO NOT CON-
NECT
THE
SPEAKERS
WITH
THE
POWER
ON.
WORK
CAREFULLY
TRIMMING
ALL
LOOSE
WIRES
ON
THE
REAR
OF
THE
SPEAKERS
AND
RECEIVER.
THE
RE-
CEIVER
HAS
BEEN
DESIGNED TO
PREVENT
DAMAGE
FROM
MOMENTARY
ACCIDENTAL
SHORTING.
HOWEVER,
REPETITIVE
SHORTING CAN
DAMAGE
THE
OUTPUT
DEVICES.
The 1
00
+
has
provisions for two pairs
of
speaker
systems for
the
front
channels,
and
another
two pairs for
the
back.
Any
pair
may
be
driven inde-
pendently
or
a combination
of
two pairs may
be
driven,
as
selected
by
the
MAIN
and
REMOTE
Speaker
Switcl)es.
Connect
them to
the
receiver
as
instructed
in
the
diagrams
(Fig. 2
and
Fig. 3),
taking
care
not to confuse
the
FRONT
and
BACK,
LEFT
and
RIGHT
channels,
and
the
plus
and
minus polarities. Sufficient
care
should
be
taken
not to short circuit
the
plus
and
minus
leads.
SPEAKER
IMPEDANCE
Each
speaker
system
connected
to your 1
00
+ must possess
an
impedance
of
from 4 to
16
ohms. Should you wish
to
drive two pairs
of
speaker
systems
simultaneously, they should all
have
an
impedance
of
8 ohms
or
more.
It
should
be
noted
that
it
is
not
necessary
to match
the
impedance
of
the
speakers
to
the
receiver since
the
100
+
is
a solid
state
instrument
and
can
accommodate
all
speakers
ranging
in
impedance
from 4 to
16
ohms without
special
transformers.
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