|SANSUI AU-alpha 607i
The stereo Integrated Amplifier which adopted the alpha-X balance circuit.
An alpha-X balance circuit is a scheme
transmitted and amplified using the exclusive amplifier which became independent
to both by the side of + of a signal, and -, and since it has dissociated with
the grounding, it has prevented the noise and the distorted influence from a
Moreover, the power part input stage is considered
as the differential balance input which uses low-noise FET, and since inphase
component removal ratio:CMRR (Common Mode Rejection Rato) by the side of + of a
signal system and - is large, the circuitry itself has canceled an inphase noise and distortion.
Furthermore, in order to drive from the bothways by the side
of + and - to the conventional amplifier having driven between the amplifier
output and the grounding in an alpha-X balance circuit,A power supply system
noise did not mix but the occurrence of IHM (Interface Hum Modulation) by the
counter-electromotive force from a speaker is prevented.
balance power source which was made to become independent of a grounding and was
made into the closed loop is used for a power-source part.
+ While an
electric current is equal and always prevents the ill effect to the signal by
the unbalance of a power source by the side and - side, it is a design strong
also against the noise and power supply variation from AC line.
while carrying the mass large-sized transformer excellent in the regulation, a
gold supply capacitor with a quick charge-and-discharge speed and first recovery
diode are adopted.
In addition to a master regulator, the twin regulator
system which has stationed the local regulator on a phone equalizer substrate and a preamplifier substrate is adopted.
For the regulator of a two-step
stream composition, it is strong to a power supply variation or a load
variation, and the stable clean powering is made possible.
scheme tone control in which a defeet is also possible is carried.
De Dis Pau Shal substrate excellent in the periodic-damping property is adopted
as the substrate of a power part.
The solid & anti flux chassis
which the work which eliminates an oscillation and an interference of a noise
was made is used for the chassis. While carrying out the full separation
shielding of each stage with a separator, measures are taken also against the
extraneous vibration by five large-sized insulators (certain-factor5 insulator)
by which loading distribution was carried out the optimal.
equalizer of an FET stream composition is adopted.
A Subsonic Filter, a
muting, and the accessories circuitry of a balance control are passed, and the
Source-Direct functionality which links all the input sources with the predrive
stage directly is carried.
||Alpha-X balance integrated amplifier
|<Power amplifier part>
(10Hz - 20kHz, both channel drive)
|THD (at the time of an effective output)
||0.003% or less (8ohm)
|Cross modulation distortion (at the time of
an effective output)
||0.003% or less (8ohm)
|TIM distortion (SAWTOOTH)
||Below a limit-of-measurement value
|Phono man month: 2.5mV / 47kohm
Phono MC: 300 microvolts/100 ohm
compact disk, Tuner, Line, Prosessor,
Tape/DAT/Play1-2-3:150mV /, 47kohm
|Phono maximum permissible input
||Phono man month: 20Hz-20kHz}0.2dB
compact disk, Line, and Tape/DAT/Play1-2-3:1Hz-300kHz+0 -3 dB
||Phono man month: 88dB or more
70dB or more
Tuner, Line, compact disk, and more than
||The Bass maximum variation: }5dB (50Hz)
The Treble maximum variation: }5dB (15kHz)
||16Hz (-3dB), 6dB / oct
||Width 448x height 160x depth of 441mm