Sansui QR-8500 Operating Instructions Manual
OPERATING INSTRUCTIONS
4-CHANNEL RECEIVER
SANSul D1R-8500
SANSUI ELECTRIC COMPANY LIMITED
Congratulations on joining the thousands of proud, satisfied owners of quality
stereo components from Sansui.
The QR-6500 is a 280 watt 4-channe1 receiver endowed with practically all
the features necessary for enjoying every type of music in the new, enthralling
4-channe1 form. Incorporating Sansui's exclusive 4-Channe1 Synthesizer
Decoder, it lets you convert today's 2-channe1 stereo records, tapes and FM
multiplex broadcasts into four channels. It lets you reproduce discrete
4-channe1 program sources as well. It also lets you transform 4-channe1 sources
encoded into two channels back to four channels. Needless to say, it lets you
reproduce 2-channe1 sources in 2-channe1 stereo if you so desire.
The QR-6500 connects up to three pairs of speaker systems for the front
channels, and two pairs for the rear channels, enabling you to hear the
reproduction in two rooms. In addition, it is provided with a Synthesizer/
Decoder Function Control and a Mode Switch to let you hear each selection
with the most effective sound effect. In short, we have made it one of the
most complete, most versatile 4-channe1 receivers available today.
Now it is up to you to read the instructions contained in this booklet, so that
you may take full advantage of its rich performance potential.
Again, welcome to the world of 4-channe1 stereo, and our sincere gratitude
for your choice. You will not be disappointed.
CONTENTS
SWITCHES AND CONTROLS .......................................... 3, 4, 5, 6, 7
TO EN,JOY 4-CHANNEL STEREO AT ITS BEST ........................... 8
CONNECTING SPEAKER SYSTEMS/PLAYING RECORDS......... 9, 10
RADIO RECEPTION ............................................................ 11, 12
2-CHANNEL TAPE DECKS ................................................... 13, 14
4-CHANNELTAPEDECK...................................................... 15,16
SIMPLE MAINTENANCE HINTS ................................. 17, 18, 19, 20
ACCESSORIES ........................................................................ 20
SPECIFICATIONS/CHARACTERISTICS................................. 21, 22
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SWITCHES AND CONTROLS
1 2 3 4 5 6 7 8 9 1 11 1 1 1 1 1 1 1
PHONES
SPE AK ERS
(3) Power Switch
Turns on and off the power supply for tlie entire
receiver. Push it once to turn on, once more to
turn off. It also controls the AC outlet marked
SWITCHED on the rear panel.
(2) Headphone Jacks
Accommodate two stereo headphone sets for
monitoring or private listening. The upper jack is
for the front channels, and the lower one for the
rear. When listening with headphones, turn both
the Front and Rear Speakers Switches to 'OFF.'
The headphones used should be dynamic types.
(3 Front Speakers Switch
The QR-6500 connects up to three pairs of speaker
systems for reproducing the front channel sorinds,
and this switch allows selecting any pair or a combi
nation of two pairs.
OFF: To cut off the sound from the front left and
right speaker systems when listening with head-
phones.
k. To drive the front channel speaker systems
connected to the FRONT SYSTEM-A terminals
on the receiver's rear panel.
B: To drive the ones connected to the FRONT
SYSTEM-B terminals.
C: To drive the ones connected to the FRONT
SYSTEM-C terminals.
A%B: To drive both the
A and B pairs of
speaker systems.
A+C: To drive both the A and C pairs of
speaker systems.
@) Rear Speakers Swtch
Up to two pairs of speaker systems can be con-
nected to the QR-6500 and selected by this switch.
Use it in a manner similar to the Front Speakers
Switch.
3
(5 Low Filter Switches
Push to cut off low-frequency noise such as the
rumbling of the turntable motor. Otherwise, leave
the switches off. The ripper switch is for the front
channels, and the lower one for the rear.
@ High Filter Switches
Push to cut off such high-freqriency noise as tl'ie
scratch noise produced by a worn record, tape
hiss or the whistle noise contained in radio broad-
casts. Leave the switches off at all other times.
The upper one is for the front channels, and the
lower one for the rear.
(7
Bass Controls
Use to strengthen or weaken the receiver's low-
end response according to your personal prefer-
ence, the frequency response of the speaker sys-
tems in use or the acoustics of your room. Turn
them clockwise to emphasize the lows, counterclock-
wise to de-emphasize. The ripper one is for the
front channels, and the lower one for the rear.
(8 Treble Controls
Use in the same manner as the Bass Controls to
boost or cut the receiver's high-end response.
(9 Front Balance Control
Use to balance the front left and right channels.
Slide it to the left to increase the sorind vofüme in
the front left channel, to the right to increase that
in the front right channel.
@ Rear Balance Control
Use in the same manner as the Front Balance
Control to balance the rear left and right channels.
@ Main Balance Control
Use to balance the front and rear channels. Slide
it rip to increase the sorind volume in the front
channels, down to increase that in the rear chan-
nels.
@ Volume Control
Use to control the overall sound volume. Turn it
clockwise to raise.
4
SWITCHES AND CONTROLS
@ Mode Switch
Lets yori switch between the 2- and 4-channe1
operating modes. Each mode is sub-divided into
several modes to let yori hear the music in the best
condition possil:ile. Functions when reproducing
discrete 4-channe1 program sources as well, whether
they are connected to the AUX (4 CHANNEL) o.i-
4 CHANNEL TAPE MON inprits on the rear
panel.
2 CH: With tliis switch set to any of the three
2-channe1 positions, if you have the Synthesizer/
Decoder Function Control set to the '2CH' posi-
tion, you'll hear the rinaffected 2-channe1 program
sorirce that yori fed to the receiver. However, if
you have the control set to other positions, or if
yori are reproducing a pre-recorded 4-channe1
tape, only the front left and right channel sounds
will be heard.
REAR: The front left and right channel sounds
will be heard from the rear left and right
speaker systems only.
FRONT: The same sounds will be heard from
the front left and right speaker systems only.
F & R: The same sounds will be heard from
all four speaker systems simultaneously.
4 CH: Set the control to one of the following four
positions when hearing music in 4-channe1 stereo.
If the n"irisic is originally 2-channe1 and you're
converting it into four channels through the re-
ceiver's 4-Channe1 Synthesizer Decoder, the Syn-
thesizer/Decoder Function Control should of course
be set to a position other than '2CH.'
NORMAL: Normal position for 4-channe1
stereo.
RIGHT QUARTER TURN: To turn around
sound by 90 degrees clockwise. The front left
and right channel sounds will now be heard
from the front and rear right speaker systems,
and the rear left and right channel sounds from
the front and rear left speaker systems. Use this
position to obtain a normal 4-channe1 stereo effect
when hearing vocal or other types of program
where sorind is loud only on one side.
HALF TURN: To turn around sorind by 180
degrees, so that the front channel sounds will
l:ie heard from the rear channel speaker sys-
tems. Used to hear vocal or other types of
program, this position will make the listener
feel like he is right in the middle of the stage.
LEFT QLiARTER TURN: To turn arorind
sound by 90 degrees corinterclockwise.
@ Selector Control
Depending on what you wish to hear, fürn to the
appropriate position.
PHONO 2: Selects a turntable (arito changer,
pl"ionograph, gramophone or record player) con-
nected to the PHONO 2 inprits on the receiver's
rear panel.
PHONO 1: Selects the one connected to the
PHONO 1 inprits.
FM AUTO: To hear FM broadcasts, whether
stereo or mono. When the broadcast signal changes
froin mono to stereo, the receiver automatically
switches itself to stereo reception.
FM MONO: When the receiver is set to FM
AUTO and receiving an FM stereo signal, reset it
to this position if the reception should be filled
with noise and intolerably rinpleasant. The broad-
cast will then be receiyed in mono but the noise
will be substantially reduced.
AM: For receiving AM broadcasts.
AUX (2CH): To hear whatever 2-channe1 pro-
gram source is connected to the AUX (2 CHAN-
NEL) inputs on the receiver's rear panel.
AUX (4CH): To hear whatever 4-channe1 program source is connected to the AUX (4 CHAN-
NEL) inputs on the receiver's rear panel.
Note: Needless to say, whatever program source is
connected to the AUX (4 CHANNEL) inputs
bypasses the receiver's 4-Channe1 Synthesizer
Decoder section.
s
For this sound effect, the '2-2 System' of speaker
positioning is more effective.
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@) 4-Channe1 Indicätor
This orange indicator glows to indicate the receiver
is operating in a 4-channe1 mode when the Synthe-
sizer/Decoder Function Control is set to a position
other than '2CH' and the Mode Switfö to a 4-
channel position.
@ Synthesizer/Decoder Function
Control
Operate this switch to obtain the sound effect most
appropriate for the particular type of tnusic yohi are
about to hear.
Such sound effect will be further enhanced by
employing a proper speaker position (see page 8)
and setting the Mode Switch to an appropriate
position.
2CH: Two-channel input signals will bypass tl"ie
built-in o,4-Channe1 Synthesizer Decoder and be
reproduced as the front left and right channel
sounds.
CONCERT HALL 1: For orchestras, big band
jazz, etc. Suitable for most purposes. The 'Front
2-2 System' of speaker positioning produces the
best results.
CONCERT HALL 2: For solo performances,
vocals, ,'and ',other small band selections. Again,
the 'Front 2-2 System' of speaker positioning
produces the best results.
8URROUND/DECODER: Suitable for pro-
grams which sound most effective with the musical
instruments scattered throughout the room, such
as popular music, mood rnusic, Moog sound, rock
'n' roll, rhythm and blues, etc. Set to this position
also when hearing 4-channe1 program sorirces
encoded into a 2-channe1 form (record, tape, etc.)
by a 4-channe1 encoder. Produces distinct sound
images of the musical instruments an,d singers in
the room, giving you a 4-channe1 stereo effect
equal to or, in most cases, even better than that
obtainable from a discrete 4-channe1 stereo system.
@ Digital Indicator
Indicates whether the receiver is operating in the
2- or 4-channe1 mode. Figure '2' appears when
the Mode Switch is set to a 2-channe1 position, and
figure '4' when it is set to a 4-channe1 position.
@
Tuning-and Signal Meters
These meters both ilfüminate when FM AUTO
or FM MONO is selected on the receiver's
Selector Control. The desired FM station is pin-
pointed when the Signal Meter pointer has swung
as far to the right as possible and the Tuning
Meter pointer is perfectly centered. An AM sta-
tion, in contrast, is correctly tuned in when the
Signal Meter pointer has swung as far to the right
as it will go.
6
SWflCHES AND CONTROLS
@ Loudness Switches
The füunan ear is such that an apparent 'droporit'
of the lows and highs occurs when you're listening
at a low vofüme level. Pushing these switches
con'ipensates for this apparent loss and appropri-
ately accents the lows and highs, so that yori'll
hear the nuisic in a more nafüral state. The left
one is for the front channels, the right one for the
rear.
(O FM 'Muting Release Switch
This switch, if not depressed, eliminates the in-
terstation noise commonly heard when füning on
the FM band. It should be pushed to release the
muting function when you are tuning in on a
weak FM station.
@ 4-Channe1 Tape Monitor Switch
Push this switch to monitor a tape being record-
ed by the 4-channe1 tape deck connected to the
4-channe1 tape monitor inprits on the receiver's
rear panel, or to reproduce a tape so recorded.
Tlie monitoring is possible only if the 4-channe1
tape deck is equipped with separate heads for
recording and playback.
At all other times, prish the switch once more to
restore it to the original position.
@ 2-Channe1 Tape 'Monitor
Switches
Tl"iese switches control 2-channe1 tape monitor
circuits 1 and 2. Detailed instructions on the
operation of such tape decks are given O1] page 13.
@ Tape Deck Jacks
A part of tape monitor circuit 2, these jacks are for
connecting a 2-channe1 tape deck with phone
pfügs. The left jack is for recording, and the right
one for playback. When a tape deck is connected
here, the pin jack terminals for tape monitor
circuit 2 on the receiver's rear panel is automatical-
ly disabled.
@ Dial Scales
Illuminate when either AM, FM AUTO or FM
MONO is selected on the Selector Control. The
upper scale is for FM, the lower one for AM.
@ Dial Pointer
Illuminates in the same manner as the dial scales.
@ Tuning Knob
Tune in the receiver on the desired station by
turning this knob, watching the Tuning Meter
and/or Signal Meter. '
@ FM Stereo Indicator
Illuminates when the receiver is tuned in on an
FM station broadcasting in stereo.
@ Selector Indicators
When the receiver is turned on, one of these in-
dicators brightly illuminates to show what program
source is selected on the Selector Control.
7
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