SANSUI AU - α 607 MOS Limited
* Limited Products
¥ 180,000 (released in 1999)
Commentary
This is a limited model that uses for the amplifier stage from stocks used to repair old MOS FETs whose production had already ended, to ones whose manufacturer's warranty period has passed eight years.
This is the last model released as the 07 series.
The power stage of of the 607 MOS Limited, an old-model MOS FET, which has excellent linearity and enables stable high-speed amplification because no accumulation effect occurs, is used as an output element in a pair.
This device was first used in the AU-X111 in 1984, and has been used in high-end Sansui models such as the AU-X1111 MOS VINTAGE (1988) and B-2105 MOS VINTAGE (1996).
The biggest technical approach in 607 MOS Limited was to achieve the optimum operating environment for the current-operated amplifier.
In order to improve the operation of the output stage, which requires a large amount of current inside the amplifier, we have newly developed a large-size heavy-duty transformer with a secondary winding current of 10A, approximately twice that of the conventional transformer. This instantaneous supply of a large current.
The power supply capacitor is 65 φ / 8200 μ Fx2, which is used in the B-2105 MOS VINTAGE. It is compatible with instantaneous large current response. In addition, to increase the current allowance inside the amplifier, the attached power cord and power switch are changed to a current allowance of 15A. The current path is stabilized and instantaneous large current response is achieved.
Equipped with an Ultimate α -X balance circuit, which is the circuit system of a balance amplifier. Power MOS FET is adopted for the output stage, and the current margin of the driver stage is of the driver stage is doubled compared to the conventional one, and A-class operation is achieved.
In order to effectively cut out mechanical vibrations from inside and outside of the amplifier, which cause a kind of intermodulation to music signals, the basic structure adopts a reinforced twin monaural construction in which a power supply part consisting of an electrolytic capacitor and a mechanical floating power transformer is placed in the center, and internal layout with stable sound image and phase is realized.
In addition, pure copper material and Teflon are used to prevent the vibration of the power transformer from being transmitted to the chassis. In addition, vibration control by Teflon tape, which has been used in high-end Sansui machines, is also used as an effective isolation in the main point.
Equipped with an elliptical-shaped radiator that minimizes vibration generation, interference between the power system signal and music signal is eliminated from the basic structure.
In addition, SANSUI's original elliptical transparent resin insulator disperses and absorbs vibrations.
Limited specification gold plated lead top quality parts adopted (small electrolytic capacitor, film capacitor, RMG resistance, etc.)
Equipped with 10 input terminals.
Equipped with phono equalizer MM / MC and REC selector.
All-gold plated input terminal
6-row Detent Volume
Polyester Mirror Finish Wine Red Sidewood
Power Cord / AC Outlet with Polarity Indicator
AC inlet.
Model Rating
Type | Integrated amplifier |
Power Amplifier Unit | |
Frequency Response (1W) | DC ~ 300 khz + 0 db, -3dB |
Effective output (10 Hz to 20 kHz Simultaneous operation of both channels) |
75W + 75W (6 Ω) 50W + 50W (8 Ω) |
Total harmonic distortion factor (at effective output) | 0.008% or Less (8 Ω) |
Cross modulation distortion factor | 0.008% or Less (8 Ω) |
Damping factor | 150 (8 Ω) |
Input Sensitivity / Impedance | 1V/10k Ω (1 kHz) |
Signal-to-noise ratio (A network) | 120 dB or more |
Dynamic Power | 100W (2 Ω) 95W (4 Ω) 75W (6 Ω) |
TIM (SAWTOOTH) | Measurement limit value or less |
Slew rate | 180 v / μ sec (8 Ω) |
Rise time | 0.6 μ sec |
<Pre-part> | |
Frequency Response (1W) | CD, Tuner, DVD/Line, Tape-1/MD, Tape-2 : DC ~ 300 khz + 0 db, -3dB Phono MM : 20 Hz to 20 kHz ± 0.2 dB |
Input Sensitivity / Impedance (1kHz) |
Phono MM : 2.5mV/47k Ω Phono MC : 300 μ / 100 Ω CD, Tuner, DVD/Line, Tape-1/MD, Tape-2 : 150mV/20k Ω |
Phono maximum allowable input | MM(THD 0.01%):210mV MC(THD 0.1%):21mV |
Signal-to-noise ratio (A network) | Phono MM : 88 dB or more Phono MC : 70 dB or more CD, Tuner, DVD/Line, Tape-1/MD, Tape-2 : 110 dB or more |
Tone control | Maximum variation of Bass : ± 6 dB (50 Hz) Maximum variation of Treble : ± 6 dB (15 kHz) |
Subsonic filter | 16 Hz (-3dB), 6dB/oct. |
Loudness | +6dB(50Hz) +4dB(10kHz) |
<General> | |
Rated power consumption | 170W |
Non-signal power consumption | 52W |
External dimensions | Width 466x Height 162x Depth 452 mm |
Weight | 22.5kg |