Audio Database

The

Exclusive C3
315,000yen(1988 release)

Description
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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.

Rear
Equalizer-amplifier Twin

Rating of a mode
Form Stereo preamplifier
Circuit system
Equalizer amplifier : Positive/negative 2 power-source scheme
Differential three-step hardwired-connection Class-A SEPP circuit per step
Flat amplifier : Positive/negative 2 power-source scheme
Differential three-step hardwired-connection circuitry per step
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
Phono maximum permissible input (1kHz) Phono1, 3:700mV
Phono2:700mV-1.4V
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
Treble: Sub: }6dB, 20kHz
Main: }7.5dB, 10kHz
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
Dimensions Width 468x height 206x depth of 342mm
Weight 12.5kg