Audio Database

The

SANSUI AU-alpha 607KX
89,000yen(1992 release)

Description
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The Integrated Amplifier of 607 serieses which adopted the Advanced alpha-X balance circuitry.
The technology introduced is almost the same as a high-end model, and has adopted the newly developed thing as an insulator.

The transmit and the amplification of a signal have balance composition performed simultaneously, and since the amplifying circuit and grounding circuitry of amplifier are separated completely, the Advanced alpha-X balance circuitry is intercepting the inphase distortion of a reverse electromotive style or an exogenous noise which the circuitry itself generated in the speaker side.
Moreover, a total of four exclusive amplifier is + at + [ of an output ], and - side. - With the push pull scheme to which a speaker is made to drive on the same requirements from both, the low distortion is realized and the dynamic frequency characteristic is sharply raised by lowering the impedance of a circuitry.
The RF property and electric-current threshold value which nonmagnetic embodying was thoroughly carried out and were excellent in pure-copper material have been acquired until it carries NM-LAPT developed only in the audio in the power stage and results in a bonding wire.

From the input to the output, a whole page is considered as a wide-range DC amplifier stream composition, expansion of the frequency characteristic in a nakedness property, improvement in a phase response, and reduction-ization of a distortion are performed, and NFB is stopped to the minimum.

The NEW diamond differential circuit which can take out the output by the side of - without phase inversion is adopted as a power stage, and the occurrence of TIM distortion is suppressed by the quick response to the input of a momentary signal.
Furthermore, the circuitry is made to form into wide-range high speed by carrying out cascade connection of the FET of the first rank.

The NEW alpha-X balance power source is adopted as a power-source part.
The unbalance of the power source which causes a tone-quality failure as a closed loop made to become independent of a grounding is stopped few.

The power-source part was placed in the center of amplifier, the twin monophonic construction which has arranged the power unit symmetrically to the right and left was adopted, and the optimal weight balance as the structure is maintained.

In order to control an oscillation and vibration of amplifier, the isorated mechanical feedback is introduced.
The vibration suppression isolation part made from a pure copper is adopted as oscillating channels of communication, such as between a master volume and chassis and between a power transistor and radiators.
Furthermore, an internal loss sticks a Teflon tapes for the Teflon sheet which was greatly excellent in vibrational absorption capacity between a radiator, a bonnet, and a chassis etc. between an insulator and a sole plate, and is carrying out the isolated rate of the oscillation.

The newly developed special structure insulator is fixed on the copper plating screw, and the tone-quality failure by oscillation is suppressed.

It has selected carefully and adopted from the high-quality sound part obtained by the development of the Vintage series of an SANSUI.
ARS, the golden plating bar film capacitor, the RMG gilding resistor, etc. are adopted.
Moreover, the copper plating screw is adopted as the installment screw of the front panel.

The source power direct is carried and all the line inputs can be directly linked with a power amplifier part.

An REC serector, ten all gilding input terminals, the 6-unit Detent volume, the polar attached-indicator power cord, etc. are adopted.

There was real sub- wood as an option.

Rear Internal
AU-alpha
Newly The The

Rating of a mode
Form Integrated amplifier
<Power amplifier part>
Effective output
(10Hz - 20kHz, both channel simultaneous operation)
105W+105W (6ohm)
90W+90W (8ohm)
THD (at the time of an effective output) 0.003% or less (8ohm)
Cross modulation distortion 0.003% or less (8ohm)
Dumping factor 150 (8ohm)
Frequency characteristic (1W) DC-300kHz+0 -3dB
Input sensitivity/impedance (1kHz) 1V/5kohm
SN ratio (A network) 120dB or more
Dynamic power 280W (2ohm)
220W (4ohm)
155W (6ohm)
TIM distortion (SAWTOOTH) Below a limit-of-measurement value
Slew rate 180v/microsec
Rise time 0.6microsec
<Pre part>
Input sensitivity/impedance (1kHz) Phono man month: 2.5mV / 47kohm
Phono MC: 300 microvolts/100 ohms
compact disk, Tuner, Line, Tape/DAT1-2-3:150mV /, 20kohm
Phono maximum permissible input MM(THD 0.01%):210mV
MC(THD 0.1%):21mV
the frequency characteristic (1W) Phono man month: 20Hz-20kHz}0.2dB
compact disk, Tuner, Line, Tape/DAT-1, 2 and 3:DC-200Hz, and +0 -3 dB
SN ratio (A network) Phono man month: 88dB or more
Phono MC: 70dB or more
compact disk, Tuner, Line, Tape/DAT-1, 2-3:110dB or more
Tone control The BASS maximum variation: }6dB (50Hz)
The TREBLE maximum variation: }6dB (15kHz)
Subsonic Filter 16Hz (-3dB), 6dB / oct
Loudness 50Hz:+6dB
10kHz:+4dB
<Synthesis>
Power dissipation 250W
Dimensions Width 430x height 161x depth of 446mm
Weight 18.0kg
Option Real sub- wood SW-AU2 (one set, 12,000yen)