Accuphase C-280 - Tape Monitor

TAPE MONITOR
cartridge. Normally, the 100-ohm
position should be used with MC
cartridges requiring a load impedance
of 20 ohms or more. For MC
cartridges specifying a lower load
impedance, the 30-ohm or 10-ohm posi-
tion should be used. The general rule
is that an input impedance at least
two to three times higher than the
cartridge's source impedance is
necessary. However, excellent results
are obtained at the 100-ohm position
with certain cartridges having a
source impedance of under 20 ohms.
Therefore, listen to your cartridge
at each load impedance setting to
determine the one giving the best
results. Remember that, unlike a
step-up transformer, a head amp will
overdamp the cartridge when a load
impedance equal to or less than the
cartridge's source impedance is used.
This causes an insufficient low range
and restricts the high range to
result in a very dull and unnatural
tonal quality.
The muting circuit operates for about
one second each time the setting of
this selector is changed.
Tape Monitor Control
In the SOURCE setting, components
other than those connected to the
rear panel TAPE PLAY jacks can
be heard. Therefore, this selector
must be in the SOURCE setting at all
times except when listening to one of
the tape decks. In the SOURCE
setting, the indicators in the center
of the sub-panel and the ТАРЕ indica-
tor in the central indicator section
will remain extinguished. The TAPE
indicator (in the central indicator
section) and one of the indicators in
the center of the sub-panel will
light when this selector is in either
of the tape settings. To listen to a
tape deck, press either selector 1 or
2 according to which rear panel jacks
the deck is connected.
To make a recording, press the tape
recording switch [8] to turn it on
(indicator lights). Put the tape
monitor control in the SOURCE setting
to monitor the program source or in
the 1 or 2 setting to monitor the
[1]
just-recorded
signal
from
the
deck
(if
it
has
independent
recording
and
playback
heads).
If
the
head
amp
selector
[3]
or
MC
load
selector
is
used
while
recording,
the
muting
circuit
will
operate
and
there
will
be
a
silent
gap
of
about
one
second
in
the
recording.
This
will
not
hap-
pen
if
the
input
selector
is in
the
TUNER
or
LINE
position.
ТАРЕ REC —— ОМ / OFF Switch of Tape
Recording Output
This switch turns the rear panel REC
jacks on and off. Press once to turn
on (indicator lights) and again to
turn off (indicator extinguishes).
This switch must be on in order to
perform tape recording operations.
Second indicator is provided in the
central indicator section so the tape
recording state can be checked even
when the sub-panel door is closed.
A
LEVEL Level Controls
These controls permit you to adjust
the left and right output levels
independently. Each control has a
range from 0 to infinite (- o ). The
range from 0 to -6dB is marked in
0.5dB steps and from -6 to -14dB in
1dB steps. These controls are useful
for adjusting balance between the
right and left stereo channels.
Normally, both controls should be in
the maximum 0 position and all volume
adjustments performed with the volume
control .
ATTENUATOR
Use this selector to instantaneously
reduce the volume level by -20dB or
-30dB. When this selector is turned
to the infinite position (- o ), no
Sound is audible. This selector is
useful for temporarily reducing
volume without changing the position
of the volume control, for com-
parative listening and at the
beginning of phonograph records (to
avoid the noise when the stylus is
set down on the disc).
VOLUME Volume Level Control
Turn clockwise to raise the volume
level. You should acquire the habit
of turning down the volume control
before turning the power on or off,