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If It It
detlred to use
two
similar
or
Identical full-range
speakenof
the
tame
rated
Impedance
(either
8
or
16
ohms
only)
for better
sound
distribution,
connect
one
speaker
lead of
each
pair to
"G"
and
the
two
remaining
leads to
the terminal with
a number
equal to
half
of
one
of the
speaker's rated
Impedance
.(
It
may
be
necessary
to
"phase"
the
two
speakers
by
reversing
both of
the leads
from
one
of the
speakers.) This
may
not
be done
If
each
of
the
speakers
Is
designed
for
reproduction of
a
different part
of the audio spectrum (woofer- tweeter combinations)
In
which
case a
cross-over
network
Is
required
which con-
nects
to
the amplifier
with only
one
pair
of
leads.
b)
PHONO
INPUT: The
shielded lead from your
phono-
graph should
be
provided with a shielded "phono-type"
plug.
The
Input (aek
on
the amplifier
Into
which
this
plug should
be
Inserted
depends on
the type of
cartridge
employed.
Specific
Instructions
follow
GE
Variable Reluctance
or Professional, Pickering, Fair-
child,
Recoton,
Electrosonic
&
transformer:
Connect
to
PHONO
INPUT
1
.
Weathers
FM
Capacitance
pickup:
Alternative
1
—
Use Weathers
Adaptor
PlugModel
P'631
and connect
PHONO
INPUT
2.
Alternative
2
—
Cut
the Jumper
shorting
the
47mmf
capa-
citor
coming
off
PHONO
INPUT
1
fack
Inside
the
chassis
(Identified
by
red tape
In
wired
units).
Connect
from the
"constant amplitude" output of the
Weathers
oscillator
unit to
PHONO
INPUT
1
.
Audak,
Ronette
TO-284P;
Ferranti
&
transformer:
Con-
nect
to
PHONO
INPUT
2.
Ceramic
or
crystal
cartridges that
equalize
for
RIAA
curve.
Use Electro-Voice Adaptor
Model 504
and connect
to
PHONO
INPUT
2.
If
an
adaptor such
as the
Electro-Voice
Model
504
Is
not
used,
a
crystal
or
ceramic
cartridge
may
be connected
to
the
AUX.
INPUT.
The
equalizer-preamplifier
circuit
Is
not effective
In
this
case.
e)
HIGH
LEVEL
INPUTS—
Four high
level
Input |acks
designated as Tuner,
TV, Tape, and
Auxiliary are pro-
vided
for
connectlonof
tuners, tv receivers,
tape
recorder
playback,
and
ordinary or
RIAA
equalizing
crystal
or
cera-
mic phono
cartridges
without adaptor.
A
shielded
cable
with
a
shielded
"phono-type" plug
should
be
used
to
con-
nect each'of
these sources to the
corresponding
amplifier
Input jack. Unless
the source has
a low— Impedance
out-
put such as a cathode
fol
lower
(with
which up
to
50
ft.
of
cable can
be
used),
use the
shortest possible
connection
ana
low,
capacity
shielded
cable
(cable
having
as
low
as
25mmfd
capacitance
per
foot
Is
available).
If
the tuner
employed
has
a volume
control to adjust the
output,
set
this
control as follows.
Turn the amplifier
LEVEL
control to
minimum
and
the
LOUDNESS
control to
maximum .Play
any
record!
ng on your phonograph and
turn
up
the
level control
to
obtain
on
ordinary
listening level.
Without
touching
the
LEVEL
or
LOUDNESS
controls, turn
the
SELECTOR
to
TUNER
and
ad|ust the
volume
control
on
the tuner
to
obtain approximately the
same
loudness
level
as
was
obtained from
the recording.
In
the case
where
the tuner has
no
output
level
control
and
also
In
the
case of theotherhlgh
level Inputs,
the Independent
LEVEL
control
on
the
front
panel of the amplifier permits
adjust-
ment
of
the
level
when
changing
Inputs.
c)
TAPE OUTPUT:
A
shielded cable (up
to
30
ft.
may
be
used)
wlthashtelded "phono-type"
plug should
be
used
to
connect
from the
TAPE
OUTPUT
jack
to
the Input of
the
tape
recorder.
Any
Input
chosen
by
the
SELECTOR
Is
fed
out
to
the
tape recorder through
this
jack.
Phono
Inputs
fed
In
at
PHONO
INPUT
1
and
PHONO
INPUT
2
are of
course equalized according
to the
equalization selected
and
all
Inputs
are
affected
by
the
level
and
tone
controls.
The
loudness control
does not
affect the
tape output
and
permits
adfustmentof
the
listening level
while
recording.
d)
POWER CONNECTIONS:
The power
cord of
the
turntable
and
tuner
may
be
Inserted In
the
convenience
outlets
provided mi the
rear chassis
apron. Thereeeptaele
marked
"PHONO*
9
provides
110
volts
AC
regardless
of
whether
the
power
switch of
the amplifier
Is
turned
on
or
off
In
order
to protect
the turntable
mechanism
.
The
receptacle
marked
"TUNER"
ts
"live" or
"dead" depend-
ing
on
whether
theamplifler
power
switch
Is
turned
on
or
off.
3.
HUM
ADJUSTMENT
a) After
checking
the amplifier
for
proper operation,
remove
all
Input cables
to
the amplifier
and
make
the
fol
lowing
control
settings
which
hold throughout the pro-
cess
of
hum
adjustment:
SELECTOR
at
RIAA, LEVEL
&
LOUDNESS
to
10,
TREBLE
control at
"5,
BASS
control
at 0.
Next
precede
as
fol
lows:
With
your ear held
close
to
the speaker,
Insert
the amplifier
power
plug
Into
the
wall
outlet
and
listen
to
the
hum
level.
Now
pull
out
the
plug an
re-
Insert
It
with
the prongs reversed
and
listen
again.
Choose
the prong
position
which
gives the
least
hum.
Now
connect
the tuner Input
connector
to the
am-
plifier
TUNER
Input jack,
and
with
toner
set
between
stations
and
the toner
volume
control set
at
minimum, do
the
same
with
the
power
plug of
the toner, using
the
TUNER
convenience
outlet
on
the amplifier
If
desired.
Finallyconnect
the
phono
Input
connector
to
theamplifler
PHONO
1
or
PHONO
2
Input as
Is
required (turntable
off
and
pickup arm
at
rest
position)
and do
the
same
with
the
power
plug
of the turntable, using the
PHONO
con-
venience
outlet
on
the amplifier
If
desired.
When
ail
of
this
Is
completed,
adjust the
hum
balance
control
on
top
of the amplifier
chassis
for least
hum.
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