Instruction manual
BASS, MID AND
TREBLE
CONTROLS
These
controls
are used to
adjust
the
tonal balance
of program material
to
suit
your
individual listen-
ing preference. Each
control
is of
the
dual con-
centric friction-coupled
type.
This
permits
sepa-
rate
control
of each channel to
compensate
for
unbalanced
room
acoustics or
for
any
other
tonal
imbalance in program material.
The
friction-coupled
feature
conveniently
allows
simultaneous
adjust
-
ment
of
both
channels.
The
smaller
knob
adjusts
the
response of
the
left
audio
channel, while
the
larger
knob
adjusts
the
right
audio
channel.
MAII\I-SPKR·REMOTE SWITCH
These switches select
the
loudspeaker
terminals
to
which audio
power
is fed.
The
MAIN
or
the
RE-
MOTE stereo pair
of
loudspeakers may be opera-
ted,
either
pair,
or
both
simultaneously if
both
switches are depressed. With
the
two
MAIN-SPKR -
REMOTE switches in
the
normal
"out"
position,
all loudspeaker terminals are internally disconnec-
ted
from
the
power
amplifier sections.
The
signal
at
the
headphones
jack is
not
affected by
the
MAIN-SPKR-REMOTE switches.
The
"out
" posi-
tion
allows
"private
listening"
to
stereo headphones.
FR
ON
PANE
L
JA
CKS
DUBBING
OUT
This
output
is internally
connected
in parallel with
the
rear panel RECORD jacks (1 and 2).
Thus
,
any
signals available at
the
rear panel jacks are simul-
taneously available at
the
front
panel. You can con-
nect
the
recording inputs of an external
recorder
to
this
jack, using a
standard
3-conductor
plug. Plugs
of
th
is
type
have an insulated tip, an insu lated ring,
and a sleeve
for
common
return
or
ground.
The
tip
of
the
plug receives
the
left channel of a program,
and
the
ring receives
the
right channel (see Figure 6).
DUBBING IN
This jack has a built-in switch which
automatically
disconnects
the
rear panel PLAY (1 and 2)
jacks when
you
insert a
standard
3-conductor
phone
plug . It is
intended
to receive
the
playback
outputs
of an external
tape
recorder.
I L
EFT
CH ANNE L
COMMON
I
RIGHT
CHANNEL
Figure
6. Stereophone
Plug
STEREOPHONES
Th is jack accepts
the
standard
3-conductor
phone
plug used on
standard
stereo
headphones
(see
Figure 6 ). It is internally
connected
to
the
power
amplifier section
through
isolation resistors to
provide
adequate
sound
level with
popular
low
impedance
headphones
as well as with high im-
pedance ones.
Two
or
more
sets
of
headphones
may be used with
the
aid
of
"Y"
connectors.
The
headphone
jack
output
is
not
affected by
the
MAIN·SPKR·REMOTE switches.
SOME SUGGESTIONS ON USING TAPE RE-
CORDERS
WITH YOUR MODEL
2270
There
are several ways
to
connect
and
operate
tape
recorders with
your
receiver.
To
avoid
con
-
fusion in
the
following discussion, reference to
"tape
monitoring
" assumes
that
the
recorder is
equipped
with separate record and playback heads
and separate record and playback preamplifiers.
To
further
simplify
this
discussion, a
tape
reo
corder
normally
connected
to
the
rear panel
PLAY 1 jacks will be referred
to
as
the
"main
1"
recorders. A separate recorder normally
connected
to
the
front
panel jacks will be referred
to
as
the
"external"
recorder. This general arrange-
ment
is illustrated in Figure 7 .
RECORDING AND PLAYBACK
The
simplest system involves
only
one
tape
recor-
der, whose
inputs
are
connected
to
the
rear panel
RECORD (1
or
2) jacks,
and
whose playback out-
puts
are
connected
to
the
corresponding rear panel
PLAY (1
or
2). An equally simple
arrangement
with
only
one
tape
recorder
would
be
to
use
the
front
panel
dubbing
IN
and
dubbing
OUT
jacks as previ-
ously described.
8