Dual CV 1250 Mode D'emploi page 12

Connecting
the program
sources
Cynch-
(RCA) jacks are
arranged
at
the
rear
of
the
unit
for
connecting the program sources. The connection facility for
a
second tape recorder
or
cassette
deck
is equipped
with
a stan
dard
jack
(Dl\
41524\
The
PHONO input may
be
optimally
matched
to
the output
voltage
of
the
connected turntable
with
the
aid
of
a
two
stage
switch
(21).
This switch
is
set
to
maximum sensitivity (O
dB)
at the factory. The data
sheet supplied
with your
cartridge
will
give
you
relevant
detarls.
The input
selector
swirch (SELECTION
(6))
is
used
to
swirch
over
to the various program
sources.
PHONO
A
turntable
f
itted with
a magnetic cartridge
may be connected
to
the
cynch jacks
PHONO
(19)
(black
=
right
channel,
white
= left
channel). The extra connection wire
must
be con-
nected
to
the earthing terminal GND
(20)
Dual turntables
with DIN
leads may be
retrofitted with
the
cartridge lead, Dual
item no. 207
301, available
as a
special
accesso
ry.
TUNER
Tuners
(radio units
having
no output
stage
and no
speakers)
are connected
to
the
cynch jacks
TUNER
(18)
(black
=
right
channel, white
= left
channel)
An
input
voltage
of
approx.
1
50
mV
is necessary
for full
modulation of
the
amplif ier.
When connecting
a
tuner
with
a cynch connection we
recom
mend
the
use
of
the
AF
lead, Dual item no.226
8'1
7.
lf
your
tuner
is equipped
with
a
DIN jack, you
should
use
AF
LEAD
Dual ltem
no.265
718. The connection
leads
are available
as
special accessories
from
your
dealer.
TAPE
The HiFi
stereo
amplifier is provided with
connection
jacks
for two
tape
recorders
or
cassette decks.
Connection TAPE
1
(17)
with
cynch
(RCA)
jacks
and
connection TAPE
2 (16)
with
a
DIN
lack.
You
must connect
these
with the AF
connection
leads nor-
mally
supplied
with
tape recorders
or
cassette
decks,
lf
this
is
not the
case,
your
dealer
will
be
able
to
supply
you with
the
relevant connection
leads as
speciai
accessories
with
the
order
numbers:
AF
connection
lead,
with
DIN
plug at both
ends, Dual item
no. 226 816
AF
connection
lead,
with
cynch-(RCA)
plugs at both
ends,
Dual item no. 226 817.
Tape recordings
Tape
recordings may be
made
from all proqram sources
(turn-
table,
tuner,
tape recorder
or
cassette
deck)
connected
to
the
ampl
if
ier
without
altering the connection
leads.
The program set at
the
input
selector
switch
will
be simultane-
ously applied
to
the
TAPE 1
(17l', TAPE
2
(16)
and
MON
I
TOR LINE
OUTPUT (22t- jacks
and may be recorded during
playback
using the units connected
to
them. Volume
control
and
treble control
have no effect
on the recordings.
You
must
modulate
the
recording
as
described in the
operatinq instruc
tions of the
recordinq unit.
Direct tape to tape recording
lf
a second tape recorder or
cassette
deck
is connected
to
jack
TAPE
2 (16),
you
can
record
directly from
tape
to
tape
in
both
directions
without
having
to
alter the connection
leads.
ln
order
to
do this you should rotate the input
selector switch
to the position
of
the
tape device
which
is
playing back.
Recording
onto
a
tape
device and simultaneous
playback of
a second
program
source
Using this connection permits
you to
record onto
a
tape
device
from the
program source connected
to
the
amplifier
(turn-
table,
tuner etc.) whilst
simultaneously playinq back
a second.
program
(second
tape
device,
turntable with
f
itted
equalizing
preamplifier and
so
forth)
In order
to
do this, the
additional
12
program source is connected
to
jack MONITOR
INPUT
(23)
and
you
sould
depress
pushbutton
N/ON
ITOR
(11)
Volume
and tone controls
will
only
af
fect
the prograrn source
connec-
ted
via
l\/ONITOR
For
connection
with
a
unit incorporating DIN lack,
we
recom
mend the
AF
connection
lead,
Dual
item
no. 265 718,
and
with
a
unit incorporating cynch jacks,
we
recommend the AF
connection
lead, Dual item
no. 226 817,
available
from your
dealer
as a special accessory.
MONITOR
The
MONITOR
(23)
connection permits direct
comparison
of
recordings
with
the original without
disturbing or interrupting
the
recording process.
ln
order
to
use
this function
you
must
depress
the pushbutton
MON
ITOR
(11)
One
prerequisite for
this function
is
that
the
tape device con-
nected
be
designed
for this function,
i.e.
separate recording
and
playback
heads
with
separate recording
and
playback
amplif
ier
Please read the notes contained in the operating instructions of
the tape
device.
Ofi
tape monitoring
may be carried out
both
via the
speaker connected
to the
amplif ier and via
headphones.
A
high
level signal
(approx
150
mV)
is available at
the
LINE
OUTPUT jack
(22t-
for
recording on to
rape devices
with
cor-
responding
inpu
L
sensitivity.
lf
the tapedevice
is
equipped
with
DIN
iacks
the
monitor
con-
nection
may
be
carried
out
using
the AF
connection
lead,
Dual item
no. 265 718.
However,
if
the
device is equipped
with cynch jacks
the
AF
connection
lead Dual item
no.
226 817 should be
used.
Both
connection
leads are available
from your
dealer
as special accessories.
Connecting
speakers
The
speakers
must
be connected
to the standard jacks
marked
(DlN
41
529lr
or to
the press-type
terminal strip
at
the
rear
of
the unit.
Any
Speakers
with an
impedance
of
between
4
and 16 Ohm
may
be
used.
Please note
that the
ampl
if
ier
is designed to
achieve optimum performance when
4
Ohm
speakers are
con-
nected
to
it.
IMPORTANT!
lf
only
one
pair of
speakers are
connected,
you
may
use
speakers
with
an
impedance
of
between
4
and
16
Ohm
Speakers having an
impedance
of
less than
4
Ohm must
not
be
connected.
lf
two
pairs
of
speakers are operated simultaneously, only
speakers
with
an
impedance
of
between
8
and
16
Ohm
are
permissible.
When
4
Ohm
speakers
are
connected together
this
results
in
an overall
impedance
of
less
than
4 Ohm.
For
this
reason,
you
should
not
use
speakers
which
are
rated
below the minimum
impedance rating
of
B
Ohm per
speaker.
lf
this is the
case
you
should connect
speakers
of
the
700
series
via
the 8
Ohm
terminals
on the
speakers.
When connecting
the
speakers
via the
press-type
terminal
strip
you
must
use
twin
leads
with
marked conductors and
a
cross sectional area
of
at
least
0,5
mm2.
You
must
observe
correct
polarity
as
this will
otherwise
mean
that
playback of
certain frequencies
is
eliminated.
The
leads
from the left
speaker
must
be connected to the
ter-
minals
or
jacks L and
the
leads
from the right
speaker
to
the
terminals
or
jacks
R. Left (L)
and
right
(R)
are raken
to
mean
as
seen
from the position
of the
listener.
Speaker
switch
Two
pairs
of
speakers
may be
connected
to the
HiFi
stereo
amplif ier.
The pushbuttons marked SPEAKFRS 1
(4) or 2
(5)
serve
to
switch
the
groups
of
speakers
on
and
off
(e.9.
during
head-
phone playback) or to
switch
over
to
the
individual
speaker
o
ut
puts.
This permits
you to
listen
stereophonically
in two
separate
rooms.
When the
pushbutton
SPEAKERS 1
(4)
is
depressed
and the
pushbuttons SPEAKERS
2 (5)
is
in OFF position,
only
the
first
pair
of
speakers
will
operate.
By
depressing
pushbuttori
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