Table of Contents
Advertisement
INSTALLATION
VENTILATION
Heat is a normal operating by-product of your receiver, but the amount
developed by your receiver's power amplifier section is rarely high. The cabinet
that houses your receiver has been carefully designed to provide the ventilation
necessary, under normal operating conditions,
when
the -unit fs placed where air
can pass freely around
it.
Placing
your
receiver in a more closed space
will
restrict free air flow
.
The higher temperatures that result
within
the receiver
cabinet can influence performance and adversely affect the life of the unit.
If
it
is inconvenient for you to place
your
receiver in an open area, be sure
you allow at least two (2) inches clearance on each side and the rear panel
of the receiver, and four (4) inches clearance above it. If the space in which
you place the receiver is completely enclosed (except, of course, for access to
operating controls),
you
must provide several holes or slots below and
above
its position to allow
cool
air to flow through the receiver. The bottom clearance
af the receiver (provided by its feet) is
important
too. NEVER OPERATE YOUR
UNIT ON A SOFT SURFACE LIKE A PILLOW OR A RUG-COVERED SHELF, OR
COVER IT WITH RECORD JACKETS, WIRES OR CABLES
.
Your unit cannot self-
ventilate under these conditions.
POWER REQUIREMENTS
Connect the AC line cord to any outlet furnishing 11 7 volts, 60 Hz AC
current. The voltage may vary between l 05 and 125 volts. An auxiliary AC
power outlet is provided on the rear panel of your receiver.
Any
accessory
equipment [lope recorder, phonograph, etc.) may be connected to this receptacle
and 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 lo overload or short circuits. The 900
+
receiver
employs
five
protective fuses. All five are located on the
rear
panel.
The AC fuse labeled 3AG-5A is used to protect the power supply of the
entire system
.
The other four fuses labeled
3AG-5A
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 "CON-
NECTING THE SPEAKERS")
In the event of fuse foilure, replace ONLY
with
the same
fuse
type used.
NEVER replace with a fuse of a higher rating.
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.
2
FM ANTENNA
Refer to the special antenna booklet supplied with this set on how to select
the FM antenna most suited
for
your location. ln most metropolitan or near-
metropolitan areas, the antenna supplied with your receiver will be adequate.
However,
if
you are located a considerable distance from the transmitters, an
outdoor antenna may be required
.
Consult your high fidelity dealer as to the
best type to use in your location.
SPEAKER PLACEMENT !See Fig. 11
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
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-channel
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.
Advertisement
Table of Contents
