Parts And Functions - Accuphase E-350 Mode D'emploi

Parts and Functions

POWER – Power switch
1
Depress this switch to activate the amplifi er. Push once more to release
the switch and turn the amplifi er off. For an interval of about 5 seconds
after power is turned on, there will be no sound from the speakers, due
to the action of the muting circuit.
● After turning the power off, do not set the power switch immediately to ON
again (within 10 seconds).
SPEAKER – Speaker selector
2
Serves to select two pairs of speakers connected to the "A" and "B"
speaker terminals.
OFF
Both speaker pairs are turned off, for example for headphone listening.
A, B
The respective speaker pair is active.
A + B
Both pairs of speakers are driven simultaneously. In this case, use speakers with
a rated impedance of 4 ohms or more, as both sets are connected in parallel.
This position is also used for biwiring a single set of loudspeakers (using
separate cables for the low frequency range and mid/high frequency range).
COPY – Copy selector
3
When two recorders are connected to the E-350, dubbing can be carried
out in either direction by using this selector.
1 Š 2, 2 Š 1
To use the recorder connected to the RECORDER 1 jacks on the rear panel
as source and the recorder connected to the RECORDER 2 jacks as recorder,
set the selector to "1 Š 2". For dubbing in the opposite direction, use the
"2 Š 1" position.
OFF
Set the selector to this position when dubbing is not desired.
RECORDER – Recorder selector
4
REC OFF
Select this position in normal operation (when not recording). The amplifi er
reproduces the selected program source, but the signal does not appear at
the REC outputs.
–
SOURCE "REC ON" LED lit
Select this position when wishing to record. The amplifi er reproduces the
selected program source, and the signal appears at the REC outputs.
–
1, 2 "RECORDER" and "REC ON" LEDs lit
Select this to reproduce the signal from a recorder.
Select the position depending on the rear-panel "PLAY" input (RECORDER 1
or RECORDER 2) that is used.
MC/MM – MC/MM selector button
5
This function is only available when the Analog Disc Input Board
AD-20 is installed.
This selector button determines the phono stage gain for playback of analog
discs (phono records) with the AD-20.
● Button pressed (MC):
● Button pressed once more (MM):
MC
This position should be used for moving-coil (MC) cartridges with low output.
Set the input impedance with the DIP switches on the board.
MM
This position should be used for moving-magnet (MM) cartridges. The input
impedance is 47 kilohms.
Note:
● MC/MM switching becomes available when the INPUT SELECTOR
set to the position for an option board slot where the AD-20 is installed.
● For MC/MM switching, the setting of the MC/MM selector
The AD-20 has DIP switch settings for MC/MM selection, but the board
settings are overridden by the selector of the E-350.
● The MC LOAD and FILTER settings are made only on the AD-20 board.
There are no provisions for setting these items at the E-350.
● The Analog Disc Input Board AD-9 or AD-10 can also be used, but in this
case, MC/MM selection can only be made on the board. The setting of the
MC/MM selector of the E-350 has no effect.
EXT PRE – Preamplifi er/power amplifi er separator button
6
This button permits using the preamplifi er section and the power amplifi er
section of the E-350 separately.
from the speakers, the sound image should be centered.
loudness decreases. This often causes the sound to be perceived as thin or
defi cient, especially in the bass range. The COMP button makes up for this effect
by boosting the lower range (+6 dB at 100 Hz).
"MC" LED is lit
"MC" LED is out
is
14
has priority.
5
● Button pressed (ON):
Preamplifi er and power amplifi er are separated.
● Button pressed once more (OFF):
Normal operation, preamplifi er and power amplifi er not separated.
Note:
Do not operate the switch during playback. Always turn the volume fully down
before setting the switch to ON or OFF.
MONO – Mono/stereo mode selector button
7
This switch selects stereo or mono operation. When the switch is pressed,
both channels are combined and the same signal is fed to the left and
right speakers. If the listening position is at approximately equal distance
● Button pressed (monophonic operation):
● Button pressed once more (stereo operation):
Note:
When the RECORDER selector setting is changed to "SOURCE", the
monophonic setting will automatically be canceled. To record in monophonic
mode, press the MONO button again after using the RECORDER selector.
METER – Meter display on/off button
8
● Button pressed (OFF):
Meter lights are out and meters do not operate.
● Button pressed once more (ON):
Meter lights are on and meters operate.
COMP – Loudness compensator button
9
This button serves to restore natural tonal balance at low listening levels.
The human ear becomes less sensitive for the frequency extremes as
● Button pressed (ON):
● Button pressed once more (OFF):
TONE (BASS, TREBLE) – Tone controls
10
–
TONE Tone control on/off button
● Button pressed (ON):
● Button pressed once more (OFF):
✽ When the button is set to ON, the BASS and TREBLE controls can be
used.
✽ When the button is set to OFF, the entire tone control circuitry is by-
passed.
–
BASS Bass control
Turning this control to the right from the center (0) position boosts the lower
frequency range and turning the control to the left attenuates it.
● Turnover frequency:
● Adjustment range:
–
TREBLE Treble control
Turning this control to the right from the center (0) position boosts the upper
frequency range and turning the control to the left attenuates it.
● Turnover frequency:
● Adjustment range:
BALANCE – Balance control
11
This control serves to adjust the left/right stereo balance.
● Normally, the control should be left in the center (0) position.
ATTENUATOR – Attenuator button
12
Pressing the ATTENUATOR button will quickly reduce the volume level
of the amplifi er to one-tenth (-20 dB attenuation).
● Button pressed (ON):
● Button pressed once more (OFF):
"EXT PRE" LED is lit
"EXT PRE" LED is out
"MONO" LED is lit
"MONO" LED is out
"COMP" LED is lit
"COMP" LED is out
"TONE" LED is lit
"TONE" LED is out
300 Hz
±10 dB at 50 Hz
3 kHz
±10 dB at 20 kHz
"ATTENUATOR" LED is lit
"ATTENUATOR" LED is out
5