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| Exclusive C3 |
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| 315,000yen(1988 release) |
High-class stereo control amplifier which in addition to the circuitry
which repeated and elaborated the measurement and the audition based on
the true nature of an audio almost carried out development adoption of
the thing of special edition, and completed one one-set product by handmade
until it resulted in each of transistors from all organization component
partses.
Especially circuitry serves as a design
which thought as important dynamic behaviors, such as a transient and a riser
property.
The equalizer circuitry has secured the high allowable input by
high-voltage design called 140V, and in order to realize the outstanding
precision, the high precision circuit element is used for it.
Moreover, in
order to acquire the robustness over a long period of time, the can shielding
transistor and the glass epoxy group board are used.
Phono2 and AUX3
termination carry the level control and a level difference coordination with
other positions can be performed simply.
Moreover, since an impedance change
is also possible, Phono2 termination can choose the impedance united with the
using cartridge.
The volume has adopted the attenuator type of 22
contacts.
The volume control which does not have a right-and-left interlock
error at the attenuation as a window combining 0, -15, and a 3 position
attenuator of -30dB is possible.
The tone control is the twin tone
control which prepared the SUB control which controls specially only
super-low-pass and a super-high region besides a main control of Bass-Treble
which makes low and a quantity region fluctuate focusing on 1kHz.
The
filter has adopted the two-step switching type of high filter 8kHz/12 kHz, and
low filter 15Hz/30 Hz, respectively.
15Hz of CRs were used, 12kHz of passive types of 12 dB/oct damping using
LC are adopted, and the damping characteristics serves as 18 dB/oct depending
on the method of active called at an electronic circuitry 30Hz and 3kHz.
The headset jack and the level
control are carried in a front lower sub panel.
By turning OFF an output
switchpoint, it can also be heard only by headphone.
In order to
eliminate the it1 sound at the time of switchpoint ON-OFF, the electronic
formula muting circuit using a reed relay was built in, and the occurrence of an
unpleasant noise is prevented.
All thumbs use what it was begun to
delete from the aluminum material of the Naked, its switching torque of the
number of switchpoints is also constant, and it is taking out the high-class
feeling.
The actual measurement measured for every set is attached, and
the robustness and the high-performance are guaranteed by perfect quality
control.
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| Form |
Stereo preamplifier |
| Circuit system |
| Equalizer amplifier : |
Positive/negative 2 power-source scheme
Differential three-step hardwired-connection Class-A SEPP circuit per step
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| Flat amplifier : |
Positive/negative 2 power-source scheme
Differential three-step hardwired-connection circuitry per step
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| Input sensitivity/impedance |
Phono1, 3:2.5mV/50kohm
Phono2:2.5mV-10mV/25, 50, 100kohm
Tuner, AUX1, 2:150mV / 100kohm
AUX3:150mV - infinity/100kohm
Tape PB1, 2 or 3:150mV / 100kohm
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| Phono maximum permissible input (1kHz)
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Phono1, 3:700mV
Phono2:700mV-1.4V
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| Output (RL=50kohm) |
Rate: 2V
Maxima: 15V |
| THD |
0.03% or less (at the time of an Output
power) |
| Frequency characteristic |
Phono:RIAA deflection ±0.2dB (30Hz - 15kHz)
AUX, Tuner, and Tape PB:10Hz-90kHz+0 -1 dB |
| Tone control |
1.5dB step switchpoint type
| Bass: |
Sub: ±6dB, 50Hz
Main: ±7.5dB, 100Hz
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| Treble: |
Sub: ±6dB, 20kHz
Main: ±7.5dB, 10kHz
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| Filter |
Low: 15Hz (12 dB/oct), 30Hz (18 dB/oct)
High: 12kHz (12 dB/oct), 8kHz (18 dB/oct) |
| Attenuator |
0 -15dB-30dB |
| The semiconductor used |
Transistor: 64 pieces
Diode: 36 pieces
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| Dimensions |
Width 468x height 206x depth of 342mm
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| Weight |
12.5kg |
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