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FRONT
PANEL
OPERATION
ΕΠ
RENI
@ POWER switch
When
this switch
is depressed to the ON
position, the
power
is supplied
to the equalizer
and
the
indicator
lights. Depress
the switch
again to set it to the OFF
position,
*
Between
three and five seconds after the switch has
been
set to ON, the muting
circuit is activated in
order to suppress the pop noise, produced when the
power
is initially supplied, and there are no output
signals.
O Equalizer section
Available in this section are the control knobs which are
used to increase or reduce the center frequency level of
the frequencies in the audible band which is divided into
27 parts. Based on a reference value of O dB, the level
may be varied up to a maximum
of +12 dB. To set the
level, align the red line of the knob with the setting
scale.
Red
line
E El E El El == EJ E
RESPONSE
(48)
RESPONSE
(dB)
ΤΗΕ:
FREQUENCY (Hz)
O PEAK indicator
This lights when the output level exceeds +21 dB and it
warns that the output level is excessively high.
OINPUT Attenuator
set to the OUT position.
O EO (equalizer bypass) switch
This switch isolates the equalizer section and passes the
input signals to the output. When the knob is set to IN,
the indicator light to indicate that the equalizer section
is now
working. When
it is set to OUT, the indicator
goes off, and the input signals bypass the INPUT ATT
contro!
and
the
equalizer
section,
and
they
are
sent
straight to the output.
In cases
like this, the Q1027
functions as a buffer amplifier, and the EQ switch is
used
to compare
the sound quality with and without
equalizing.
QHPF (high-pass filter) switch
The indicator light when the switch
is set to the "40"
and "80" position.
FREQUENCY RESPONSE
®— Indicator
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