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a} TONE SWITCH
Set this switch to ON when adjusting the bass and
treble
controls.
When
set
to
OFF,
the
tone
control
circuits
are
disengaged
and
frequency
response
is flat. This function is convenient for
checking
phono
cartridge
and
speaker
tone
quality and listening room acoustics.
@@ TREBLE TURNOVER
SWITCH
Use this switch to change over the frequency in
which
the
sound
adjustment
with
the
treble
control is starting to take effect. Select 2.5kHz or
5kHz
in accordance
with the characteristics of
your listening room
and of your speakers, and
with your general preference.
49 BALANCE CONTROL
Use this control to balance the volume of the left
and right channels. First, however, set the mode
selector to mono
(L+R,
L, or R), and adjust so
that the sound appears to come from somewhere
exactly between the two speakers. If the sound
appears to be louder on the right, it means that
the volume of the right channel is higher. Turn
the balance control to the left and adjust.
Conversely, if the sound appears to be louder on
the
left, it means
that the volume
of the left
channel
is higher. Therefore,
turn the balance
control to the right and adjust. After adjusting,
return the mode selector to STEREO.
2@ LOUDNESS SWITCH
When
listening to a performance with the volume
control turned down,
set this switch to ON
and
the bass and treble will be accentuated.
When
the volume
is low, the human ear finds it
harder to hear the bass and treble than when the
volume
is high.
The
loudness
switch
is thus
designed
to compensate
for this deficiency. By
setting it to ON, the bass and treble come through
much
more
strongly
and
the sound
takes on a
punch even when
the volume control is turned
down.
2?) MUTING SWITCH
Set this switch to —20dB to attenuate the audio
output indicated by the volume control by 20dB.
There is no need to adjust the volume control if
you use this switch when turning down the audio
output
temporarily
and
when
changing
over
records or tapes.
STEREO:
Set to this position for normal stereo
reproduction.
L+R: Mixes
left and
right channel signals and
reproduces them monophonically.
L:
Left channels signal is reproduced mono-
phonically from._both speakers,
R:
Right channel signal is reproduced mono-
phonically from both speakers.
@
CARTRIDGE
LOAD SELECTORS
{ohms and pF)
These selectors allow you
to select the input
resistance and input capacitance in line with the
rated load impedance and load capacitance of a
moving magnet (MM) cartridge for record play.
Use
these
two
switches
to produce
the sound
quality of your preference or the ideal conditions
for your cartridge.
TURNOVER
SWITCHES
prnamcey
"
I:
This amplifier adopts a tone control system that
combined
bass
and
treble
controls
with
two
turnover
switches
which
are used
to select the
frequency. Select the frequency with the turnover
switches and then enhance or attenuate the sound
in the lower (or higher) frequencies with the bass
(or treble) controls.
For instance, if the bass turnover switch is set to
400Hz
(see Fig. 7), the bass covers a wide with
large gain per step of the bass control. For this
reason,
the
reproduced
sound
sometimes
seems
unnatural
depending on the program source, but
this can
be remedied
by setting
the switch to
200Hz.
10
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