Pioneer SA-9800 Manuale di istruzioni per l'uso - Pagina 8
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FRONT
PANEL
FACILITIES
OS
©
@ POWER SWITCH
Set this switch to ON
to supply power to the
amplifier. There will be a short delay when it is
set to ON, because the muting circuit has been
actuated to suppress the unpleasant noise that is
sometimes generated when the power is on and
off.
@ POWER INDICATOR
When
the power switch
is set to ON, this lamp
lights up, indicating the amplifier is turned on.
@
SPEAKER SELECTOR
Use this selector to select the speaker systems.
OFF:
Sound not obtained from speakers.
A:
Sound
obtained
from speakers connected
to the A speaker terminals.
B:
Sound
obtained
from
speakers connected
to the B speaker terminals.
A+B:
Sound
obtained
from
speakers connected
to both A and B speaker terminals.
@
TAPE MONITOR INDICATOR
The TAPE lamp lights up when the tape monitor
switch is set to either position "1" or "2".
@
POWER METER
This meter
allows
you
to read
out
the rated
power level on the fluorescent display tube when
speakers with a nominal impedance of 8 ohms are
connected to the amplifier's speaker terminals.
©
FUNCTION
INDICATORS
The PHONO,
MC, MM, TUNER,
AUX
function
indicators light up in accordance with the posi-
tion of the function selector.
20 2p
NOTE:
The
function
indicator
will not go off when
the tape
monitor
switch
is set
to position
"1"
or
"2".
This
indicates a program
at the recording source end during
the monitoring of a recording.
@ SUBSONIC FILTER SWITCH
When this switch is set to the 15Hz position, the
subsonic filter with a cut-off frequency of 15Hz is
actuated. The subsonic filter serves to attenuate
frequencies lower than 15Hz in a 12dB/oct slope.
It is therefore effective in suppressing ultra-low
frequency
noise
which
is generated
by record
warp and other causes. You cannot actually hear
this noise but it is a factor in the generation of
intermodulation
distortion
and it may
damage
your speaker system. Set this switch to the 15Hz
position during record play for the best effect.
@® HIGH FILTER SWITCH
The
high filter with a cut-off frequency of 8kHz
is actuated when this switch is set to the 8kHz
position.
The
high filter serves to attenuate frequencies
higher than 8kHz in a 12dB/oct slope. This is why
it is effective in suppressing high-frequency noise
or noise from scratches on records being played.
@ VOLUME CONTROL
Use this control to adjust the output level to the
speakers and headphones.
Turn it clockwise to
increase the output level. No sound will be heard
if you set it to ». The scale is graduated in dB
which
indicate the attenuation when
the max-
imum output level is OdB.
8