|SANSUI AU-alpha 999DG
|135,000yen(around the 1989 time)
The Integrated Amplifier which carries the NEW
linear & direct D/A combartion system developed based on the MASH scheme.
A MASH scheme is a D-A-conversion scheme made into the criteria of a
translation of the frequency by a crystal oscillator,By high order oversampling
and the 3rd noise shaping, a digital signal is changed into an analog signal
highly precise in an instant, and the occurrence of zero cross distortion or
non-linear distortion has the special feature of not occurring theoretically.
Since it is compatible in the high precision of a MASH scheme, and
flexibility suitable in integrated amplifier in AU-alpha 999DG,The precision
near a crystal oscillator is offered, and also a lock range adopts a large LT
element, and it is considered as the original linear & direct D/A combartion
system (L. D.C.S).
In New L.D.C.S, total upgrade is aimed at from an
off-site circuitry, and the SN ratio is improved further.
power-source part, in order to put a digital part and an analog part into
practice and to dissociate, the transformer for exclusive use is carried in
digital one/analog circuit, respectively.
Furthermore, the mass transformer
was begun in the analog system, the 64phi high-performance low scaling-factor
electrolytic capacitor was adopted, and while forming a musical basic fraction,
the low-pass elongation is secured.
The balance circuitry on the basis
of a grounding was adopted as the amplifier part, and the alpha-X balance
circuit which poured in the original know-how is adopted as it. In the circuitry
itself, this circuitry has canceled a noise and distortion by balance operation.
Furthermore, - and + side enables the low distortion play by becoming + and
a push pull scheme driven on the same requirements from the bothways of - by 4
amplifier stream compositions with exclusive amplifier.
part was placed in the center and the twin monophonic construction which
arranges a power unit symmetrically is adopted. Since a digital circuit part is
shielded and arranged on the outside of the left channel unit and also an analog
input part is shielded and arranged by this on the outside of the right channel
unit, the digital part and the analog part are separated clearly.
remote controller is attached and an input source changeover of up and down of a
volume or 11 totals is possible by a listening position.
Functionalities, such as Source-Direct operation, an REC serector, and a
direct-access rotary switch, are carried.
The gilding input terminal,
the polar attached-indicator very-thick power cord, and the AC outlet are adopted.
||Alpha-X balanced integrated amplifier
||108dB or more (EIAJ)
||0.003% or less
|Digital input level
|An optical input
||660nm (light-generation wavelength)
|<Power amplifier part>
|Effective output (10Hz - 20kHz, both channel drive)
|THD (at the time of an effective output)
||0.003% or less (8ohms)
|Cross modulation distortion
||0.003% or less (8ohms)
|Frequency characteristic (1W)
|TIM distortion (SAWTOOTH)
||Below a limit-of-measurement value
|Input sensitivity/impedance (1kHz)
||Phono man month: 2.5mV / 47kohm
MC: 300 microvolts/100 ohms
compact disk, Tuner, Line, Tape/DAT1, 2 or
3:150mV / 20kohm
|Phono maximum permissible input
||Phono man month: 20Hz-20kHz}0.2dB
compact disk, Tuner, Line, Tape/DAT1, 2, and 3:DC-200kHz+0 -3 dB
||Phono man month: 88dB or more
70dB or more
compact disk, Tuner, Line, Tape/DAT1, 2 or 3:110dB or more
||Bass: }6dB (50Hz)
Treble: }6dB (15kHz)
||16Hz (-3dB), 6dB / oct
||+ 6dB (50Hz), +4dB (10kHz)
||Width 468x height 163x depth of 450mm
||Wireless remote control RS-1130