Electrical Disclaimer Further Information
Here is something special, a super rare Sansui AU-a607 Mos Limited stereo amplifier.
Made in Japan
100 VAC (step down transformer not included and required)
The last Sansui amplifier made! Reading online estimated that only ~1000 units made making it a rare find.
One for the Sansui enthusiast!
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 output: 50 watts per channel into 8Ω (stereo)
Frequency response: 1Hz to 300kHz
Total harmonic distortion: 0.008%
Damping factor: 150
Input sensitivity: 0.3mV (MC), 2.5mV (MM), 150mV (line)
Signal to noise ratio: 70dB (MC), 88dB (MM), 110dB (line)
Output: 150mV (line)
Speaker load impedance: 4Ω to 16Ω
Dimensions: 466 x 162 x 452mm
Weight: 22.5kg
Year: 1999
Presented in near mint condition with only minor blemishes in line with its age, works very well on all inputs benefiting from a minor service including a clean of the controls with deoxit, rear RCA’s treated with deoxit red and gold treatments, DC offset checked and within spec. All original capacitors
Melbourne pick up only no postage
Due to the nature of vintage electronics sold as is in good faith with no returns or warranties implied
Please ask if you have any questions thanks
The item being advertised is sold "as is", and no warranty should be assumed unless otherwise indicated and agreed between the Buyer and the Seller. Photos representing the item being advertised form part of the description unless otherwise specified.
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