Audio Database

The pictorial image of AU-alpha 607 MOS Limited

SANSUI AU-alpha 607 MOS Limited * Limited manufactured goods
180,000yen(1999 release)

Description
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The limited model which uses that over which manufacture security period eight years passed for the amplification stage from what was a repairing stock of the old model MOS FET which the production had already ended.
As 07 serieses, it is the model put on the market at the end.

607 The old model MOS FET which is excellent in a linearity since the store-recording effect does not occur, and enables the stable high-speed amplification is adopted as the power stage of MOS Limited as an output element in the pair.
This element started in AU-X111 in 1984, and has been carried in the high-end model of SANSUIs, such as AU-X1111 MOS VINTAGE (1988) and B-2105 MOS VINTAGE (1996).

607 The implementation of the optimal operating environment for electric-current operation amplifier had the greatest technical approach in MOS Limited.
First, in order to raise an operation of the output stage which needs many electric currents for a power transformer inside amplifier, large-sized and the heavy weight class transformer which set the secondary-winding electric current of the transformer to twice [ over the past / about ] as many 10A as this were developed newly, and the momentary large-current supplying is realized.
It is considered as the thing of 65phi/8200micro-Fx2 adopted as a power source capacitor at B-2105 MOS VINTAGE, and the momentary large-current response is supported. Furthermore, in order to raise the electric-current margin inside amplifier, an attached power cord and a power switch are changed into the electric-current margin of 15A. The electric-current path was stabilized and the momentary large-current response is realized.

The Ultimate alpha-X balance circuitry which is a circuit system of balance amplifier is carried. By the extravagant structure which adopted Power MOS FET as the output stage, the current margin of the driver stage is also made twice over the past, and is made the first class operation.

In order to cut effectively the mechanical vibration from the inside and outside of amplifier which cause a kind of cross modulation to a music signal, it is in basic structure,The strengthening twin monophonic construction which has arranged in the center the power-source part which consists of an electrolytic capacitor and a power transformer of a mechanical floating was adopted, and the image and the internal layout where the phase was stabilized are realized.
Moreover, pure-copper material and Teflon are adopted so that an oscillation of a power transformer may not get across to a chassis. Furthermore, the control of the oscillation on the Teflon tapes which has a track record with the high-end machine of an SANSUI etc. until now is also effectively adopted as an isolation on main points.

The radiator of the ellipse form which made the oscillating occurrence the relative minimum was carried, and the interference of the signal of a power supply system and a music signal is canceled from basic structure.
Moreover, the transparent resin ellipse form type of SANSUI original is adopted as an insulator, and a variance and sorption of the oscillation are performed.

The top quality part of the golden plating bar of a Limited specification is adopted (a small electrolytic capacitor, a film capacitor, a RMG resistor, in addition to this).

Ten input terminal equipment.

Phone equalizer man month-MC, REC-serector loading.

All gilding input terminal

6-unit Detent volume

Polyesters specular surface finish wine red sub- wood

A polar attached-indicator power cord / AC outlet

AC inlet

AU-alpha 607 MOS Limited backplane
The interior of AU-alpha 607 MOS Limited AU-alpha 607 MOS Limited several-kinds part
AU-alpha 607 MOS Limited block diagram

Rating of a mode
Form Integrated amplifier
<Power amplifier part>
Frequency characteristic (1W) DC-300kHz+0dB, -3dB
Effective output (10Hz - 20kHz)
Both channel simultaneous operation
75W+75W (6ohm)
50W+50W (8ohm)
THD (at the time of an effective output) 0.008% or less (8ohm)
Cross modulation distortion 0.008% or less (8ohm)
Dumping factor 150 (8ohm)
Input sensitivity/impedance 1V / 10kohm (1kHz)
SN ratio (A network) 120dB or more
Dynamic power 100W (2ohm)
95W (4ohm)
75W (6ohm)
TIM distortion (SAWTOOTH) Below a limit-of-measurement value
Slew rate 180v/microsec (8ohm)
Rise time 0.6microsec
<Pre part>
Frequency characteristic (1W) compact disk, Tuner, DVD/Line, Tape-1/micro disk, Tape-2 :
DC-300kHz+0dB, -3dB
Phono man month: 20Hz-20kHz}0.2dB
Input sensitivity/impedance
(1kHz)
Phono man month: 2.5mV / 47kohm
Phono MC: 300micro/100 ohms
compact disk, Tuner, DVD/Line, Tape-1/micro disk, Tape-2:150mV/20kohm
Phono maximum permissible input MM(THD 0.01%):210mV
MC(THD 0.1%):21mV
SN ratio (A network) Phono man month: 88dB or more
Phono MC: 70dB or more
compact disk, Tuner, DVD/Line, Tape-1/micro disk, and more than Tape-2:110dB
Tone control The Bass maximum variation: }6dB (50Hz)
The Treble maximum variation: }6dB (15kHz)
Subsonic Filter 16Hz (-3dB), 6dB / oct
Loudness +6dB(50Hz)
+4dB(10kHz)
<Synthesis>
Power dissipation 170W
Non-signal power consumption 52W
Dimensions Width 466x height 162x depth of 452mm
Weight 22.5kg