|69,800yen(around the 1988 time)
The Integrated Amplifier which built in the D/A converter.
right-and-left channel independent "W super linear converter" system born from
the technology cultivated by business-use digital (PCM) apparatus is adopted as
a D/A converter.
In order for there to be no conversion error (distorted) at
the time of the Dainyuu power and to use 2 sets of D/A converters, it excels in
a channel separation and a right-and-left channel time lag is not generated,
Moreover, the oversampling digital filter is adopted 4 times and the
straight line phase characteristic is improved.
Three coaxial digital
inputs are carried and the optical digital input terminal is also equipped.
By the digital audio multi-interface recovery circuit equipped with the
digital input selector by a high-speed C-MOS logic circuit, the difference in a
sampling frequency is also identified automatically and D/A conversion is
Between the digital audio interface recovery circuit unit
and the D/A converter circuit units is shielded.
Moreover, the exclusive
power source made to become independent of a secondary transformer side was
prepared in the interface circuit, and the power supply circuit detour of the
digital signal which serves as a lower person of the noise of an analog signal
Moreover, it has prevented that a digital signal leaks to an
analog part by covering with the shielding case which serves as
vibrationproofing of a chassis or a wiring board.
The power amplifier
part has the composition of having pursued high-power-izing and simple-ization
of the circuit.
The high speed and the mass transistor are used for a final
stage by the single push pull, and the voltage magnification stage used low
noise and the operational amplifier of low distortion for the first rank, and
has adopted the complimentary push pull circuit as two steps and the 3rd step.
The digital direct input switch is carried, and after a digital signal
is changed into an analog signal, it is directly linked with power amplifier and
is enabling the straight play.
Furthermore, among speaker 2 terminals, the
direct connection system which does not pass a change-over switch is used for
one line (speaker B), and it lessens the transfer loss.
transformer of a 400VA rank and the electrolytic capacitor of 8,200 micro Fx4
are adopted as a power-source part.
In order to correspond to playback
of an analog record, the equalizer amplifier which constituted the first rank
from low noise transistor differential amplification is carried.
audio system and a digital system are dissociating from a power-source part
through a large-sized heat sink, and are suppressing influence.
Subsonic Filter for Phono is carried.
The reset type high-speed
protection circuit of an establishment meter is adopted.
real-time tone control is adopted.
||Digital multi-interface loading Integrated
|<Power amplifier part>
|Output power (20Hz - 20kHz)
||CD input: 150mV/30kohm
||0.005% (20Hz - 20kHz, 50W, 8ohm)
|A dynamic characteristic / dynamic power
||5Hz - 50kHz (Output 50W, 0.5%, 8ohms)
|Line-in frequency response
||4Hz-100kHz+0 -3 dB (outputs 1W and 8ohm)
|Output load impedance
||0.1ohm or less
||Speaker: AorB:6-16ohm, A+B:12-16ohm
Headset-jack maximum except take-off: 390mW (8ohms), 8-400-ohm conformity
|<An interface / the DAC
|A digital output level / impedance
||Same axle: 0.5 Vp-p/75ohms
light input x1
|Frequency response (0dB)
|Signal to noise ratio (dB for zero, 1kHz)
|Dynamic range (1kHz)
|THD (0dB, 1kHz)
||Phono MM: 2.5mV/47kohm
CD, Tuner, AUX, Tape1, 2(PB):150mV /, 30kohm
|The maximum except take-off and an Output
||0.003% (1kHz, 1V)
|Signal to noise ratio
(the auditory sensation weighting A, input short circuit)
Phono MC (at the time of a
0.25mV input): 70dB
|Tone control characteristic
|Loudness control characteristic
||Width 434x height 143x depth of 390mm
(includeds, such as a foot, a knob, and a terminal)