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original
sound
and newly
recorded
one.
Remember that
for
reproductiorr
of
other
programme
sources
than
tape
this
switch
as
well
as
the
Tape fVonitor Switch(11) must
be
set
at the
centre
"sourcel'
position.
lf
there are
2
|ape-recorders
reprinIing
of
tape
is
feasible
also
by
other
method;
Corrrrect
the
tape-recorder
of
betler
recording performance
to
the
Recording
Output
Terlrritrals
and
otlrer
one
to
the AUX
terminals exclusively
for
play
back setting
the
Input
Selector
Switch
to
the
relevatrt
pos
r
tr
on.
SIMULTANEOUS PLAYBACK
MONITORING
3-head tape-recorder ensures Sìmultarreous
Playback
Moni-
toring
enabling
to
ascertain
perfect
recording,
In
case
of
3-head
tape
recorder
heads
and
amplif
iers
for
recording
and
playback
exist
independently
in
the
circr-rit which
ensures
simultaneous
recording
on
tape and
playback
of
the
sourrd recorded
on the
tape.
ln
this
case
recording on tape
and
playback
of
the
recorded
sound is
practised
at
the
same
time,
and connection
flrLtst
be
made
for
both
functions.
Need
to
connect
the
Record-
ing Output
Terminals(38)
to the Line Input
Termi-
nals
(AUX Input) of
tape-recorder,
and
the
Tape
Monitor
Termìnals(39)
to the
Output
Terminals
(LINE
OUf)
of
the
tape-recorder and
to
set the
Tape Dubbing Switch
at the
"source"
positon.
The
lv4onitor Switch
(1
1
)
is
set
at the position
corresponding
to
the terminals
lo
which
the tape-recorder
is
connected, and
repetition
of
switching
between
"source" and "deck-1"
or
"deck-2"
makes
it
feasible
to
compare
the
original sound
with
recorded
one.
Thus
possìble
recording
error can be
prevented ìn
case
ot
3-head
tape-recorder. lnciderrtally
note
that
reproductiotr
of
recorded
sound
becomes
a
lirtle
bit
delayed
as
compared
with that
of
original
sound since
there is a
gap
between
recording
head
and
plaVback
head. Simultaneous
Playback
IVonitoring
can
be
made througl-r
the
Tape Connector(32)
as
well.
A
single
DIN
patch cord
ensures
connection
for
recording and playback, and simple operation
of
switching
between
"source"
and
"deck',l"
of
the fVonitor Switch wìll
do.
SIMULTANEOUS
RECORDI
NG
This
arnplif
ier
is provided
with
2
sets
of
Recording
Output
Terminals (REC.
OUT)
enabling
to
record simultaneously
on 2
tape-recorders.
lf
desired,
combination
recording
on
open
reel
recorders
and/or
cassette recorders
can
be
enjoyed.
lVoreover
if
the
Tape
Connector
is used
recording
on 3
tape-recorders
is possible.
Rernember
that the
Tape
Dubbing
Sw¡lch(10)
rrrust be
set
at the "source"
position.
This
facility
is useful
for
safer
printing or effective
record-
ing
etc.
As
the
impedance
at
the
Recording
Output
Termi-
nals
is
kept sufficiently
low
(about
100
ohms)
,
mutual
interference
wi
ll
be
almost
nil
between
the
recorders
under simultaneous
operation.
ABOUT
DIN
TAPE
CONNECTOR
The
Tape Conrrector
of
this anrplifier
is
provided
¿rt
the
rear
panel
lor
convenient
connection.
This is
of
DIN
norm.
As
explained
in
the
paragraph
of
Playback
frorr
Tape
and
Recordirrg
on
Tape
,
if
tape-recorclcr is
equipped
witlr
DIN
connector,
corrDeclion
try
a
DIN
patch cord
suffices for
rccording arrd
playback.
See
lo it
that
thìs connectiorr
is
practised
orrly
by
DIN
COF
D
since
tlte
impedance
at
Fecordir.rg
OLrtpul Ter¡irlals
is
kept relatively hìglt
at
B0
Kohms
1 20
Kohms.
OPERATION
OF
TONE
CONTROLS
TSELECTION
OF MODE
(Conversion
of
Playback
Mode)
This
arnplif
ier is for
stereophottic reproductiot-t arrd
inte-
grates
independent amplif
iers
f
or
2 channels
(right and left).
Without
the
IVode Selector
the
sìgnals
fed
to
the
right
channel
terminal
are
reproduced
at the
right
clrannel
speaker. The
Mode
Selector
is
placed between
lhese
2
amplifiers
to
change
the
mode
of
reproduction.
connectlon
¡nput
oulput
TCONTROL
OF
VOLUME
Sound volume
can be
properly
adjusted
by volume control
ln the
attenuation
characteristics
turnìng
angle is propor-
tionate
to
attenualion
degree
of
dB, and the
dB
value
and
the
volume audible
to
human
ears
are
in
the porportionate
relation
That is
to
day, the rotation
of
knob
is
in
proportion
to
the
sound volume
felt by
human
ears.
The
increasing degree
of
volume
is
felt
quite
natural as
the
knob
is
turned
on to the
clockwise direction.
TCONTROL
OF
VOLUME
BALANCE
ln
case
of
deviation
between
the volume
levels
of
right
and
left
channels,
adjust
unbalanced
volume level
by
the
Volume
Control(12) The
volume balance
of
both
channels
can be
adjusted
so
that
monaural
disc
sound
reproduced
by the
stereo
cartridge
comes
from
the
centre
of the right
and
left
channels
Usually
the
volume
level
of
both
channels is adjusted identical
at the
straight
engraved
llne on the
knob. lf
a
programme source
had
deviation
of
the
volume
level between
2
channels,
establish
correct
balance
with this
balancer.
ITONE
CONTROLS
The ultimate
purpose
of
the
audio system
is
to
make the
high
fidelity
reproduction
of
programme
sources.
The
reproduction conditions and
circumstances
do
not
always
match
with
record¡ng
conditions,
and
it
is
impossible
to
reproduce
the
same
sound
with the
original
one
Also there is no
objective standard
to
judge
good
sound
from
inferior
one.
The only
possible
solution
is
for
every
listener
to
create hls
favorite
sound
according
to
his
own
taste.
lt
is therefore
very
important
that
the
audio
system
offers
such
facility
to
permìt
flexible
controls
for
creation
of
the
best
sound.
TH
is
receiver
is
equipped
wìth
various
tone
controls
for
subtìe
and minute
control
of
the
reproduced sound such as
Bass
Level Control(17)
and Treble
Level
Control(19). and Liner
Fq'alizer(16)
Bass
Level
Control
is
a
tone
control
on
frequency
response
of
low
frequency
range.
lt
is
designed
so
that
response
is
flat
at the
electric centre
point,
and a clockwise
turn
of
the knob
intensifies
low
frequency
range
while
counter
clockwise
turn
yìelds
attenuatlon
For
easy adjustmen
thìs
control
is
equipped
with
11 points
of
click
stopper
IOPERATION
OF
LOW
CUT
FILTER
When
this
filter\21) is
switched
on the amount
of
low
frequencies
you
hear ls reduced
sharpìy
at
the attenuatlon
rate
of
12dBloct
beìow
70H2.
Useful
for
removal
of
ìow
frequency
noise such as
rumbling
of
phono
motor
Also
this
can
be
used
as
an auxiliary control
for
Bass
Level
Contro
I .
IOPERATION
OF
HIGH
CUT
FILTER
When
this filterl22) is
swìtched
on the amount of
high
frequency
range
over
TKHz
is
cut
off
at the
attenuation
rate
of
12dBloct.
Useful
for
removal
of
scratch
noise,
hissing
noise
of
tape
etc.
Also this
can
be
used as
an
auxiliary
control for
Treble
Level Control.
IOPERATION
OF
LOUDNESS
Because
loudspeakers
and
ears
generally respond
less
to
extreme
high and
low
(treble
and
bass)
frequencies
as
volume
levels
are
reduced,
the
LOUDNESS
switch
is
included
to
boost
these
frequencies and
thereby
provides
tonal
compensation.
Whether
or not
you
use
this
switch
depends
upon
the
levels
at which you
generally listen,
the
kind
of
speakers
you
have,
the
room
acoustics
and
a
number
of
other variables.
Experimentation is
the
best
guide
to
using
the
LOUDNESS
switch
ITHE
LINEAR
EOUALIZER
Although
recordings
are
equalized
in
accordance
with
B
iAA
standards,
it
is
quite common
to
encounter
variations
ìn
overall
tonal
balance
from
one
record¡ng
to the
next.
In
addition,
differences
in
listenìng
environment and
room
acoustics
often
require
subtle
degrees
of
tonal
compensa-
tion
that
conventional
tone controls
cannot
correct
because
of
their
wide
range
and overlapping
crossover
characteristics.
THE LINEAB
EOUALIZER
control
provides
a
new
form
of
tonal
compensation specifically intended
for
subtly
augmenting regular
tone controls. With the control
in
its
mid-position,
f
lat
f
requency
response
is
achieved.
Switched
to
either
of
the
two "up-tilt"
posÌtions,
the
entìre
response
curve ls rotated about
a
1
KHz
f
ixed
axìs
so
as
to
linearly
increase
treble
response
whìle
simultaneously
decreasing bass
response.
Conversely, selection
of
one
of
the "down-tilt"
positions rotates
the
response
curve
in
a
clockwise
direction, providing
a
gradual
decrease
of
treble
response
and
simultaneous increase
of
bass
response.
Degree
of
slope
for
either
positive
or
negative
settings
has
I
I
l.
I
I
I
I
l
i
I
performance
USE
knob
posit¡on
R-R
L+L
normal stereo
plavback
for
normal
stereo
playback
NORMAL
reversed
stereo
playback
when program source
is
reversely connected
R
R
L
L
R
EVE RSE
r¡ght and
left
input
signals
are ¡ntegrated
for
monaural playback
of
stereo program
t\¡tx
R-B
. l-t
LIN
E
IN
LIN
E
OUT
LIN
E
IN
LINE
OUT
O O:O
O.O
C)
-o
o
RECOR
DI
NG
-C
O:O
O
oooo
PLAY
BACK
e
co
o-o
.o-o
o-o
12
13
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