SANSUI AU-D607F Extra
¥ 78,000 (released in 1981)
Commentary
An improved integrated amplifier based on the AU-D607F.
Super FF and diamond differential super FF and a diamond differential circuit. In addition, the AU-D607F Extra uses the same circuit as the AU-D707F Extra for one notch higher performance.
The first stage is equipped with a constant-current differential circuit using a dual FET capable of conducting a large current with low noise. The second stage is equipped with a diamond differential circuit using a dual complimentary service with greatly improved dynamic characteristics. The power stage is equipped with a more complete Super FF. The output transistor is equipped with a high-speed NM-LAPT.
The power supply consists of two independent power supply systems on the left and right sides. A large transformer with excellent regulation is used for the transformer, and a total of 32,800 μ F is used for the capacitor.
The EQ amplifier uses a newly developed Hi PrecisionMC / MM compatible type EQ that achieves an RIAA deviation of 20 hz to 300 khz ± 0.2 db.
A low-noise, high-gm dual FET is used for the first stage, and the push-pull drive is a pure complimentary service SEPP output with two stage differentials and current differentials with a current mirror, and all the signal capacitors from the input to the speaker out are eliminated.
The power supply section for the equalizer is equipped with a linear servo regulator, which allows a constant bias current to flow in the circuit to cope with transient loads, enabling a clean and stable power supply at all times.
The signal path is simplified and straightened by the adoption of heat pipes and three dimensional wiring.
In addition, NM transistors and NM resistors are used to reduce magnetic distortion that pollutes sound.
Relays are used for both A and B speaker terminals, and the influence of magnetic flux is reduced by adopting a remote control type that eliminates the routing of the output to the speaker selector switch.
Equipped with two independent source recording selectors and a two circuit tape monitor / copy function.
Equipped with a subsonic filter.
It uses a detent type volume.
Large speaker terminal is used.
Equipped with audio muting function of -20dB.
Uses a real wood side panel and top panel.
There are 2 color variations of black and silver.
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Model Rating
| Type | Integrated DC amplifier |
| Power Amplifier Unit (Super Feedforward & DD/DC System) | |
| Effective power | 80W + 80W (8 ohm, 10 hz to 20 khz, THD 0.003%) 80W + 80W (8 ohm, 1 khz, 0.002% THD) |
| Total harmonic distortion factor (10 Hz to 20 kHz at effective output) | 0.003% or Less (8 Ω) |
| Intermodulation Distortion Factor (60 Hz : 7 kHz = 4 : 1, SMPTE) | 0.003% or Less (8 Ω) |
| Output Bandwidth (IHF, both channel operation, THD 0.02%) | 5 Hz ~ 70 kHz (8 Ω) |
| Damping factor (new IHF, 20 Hz to 20 kHz) | 100 (8 Ω) |
| Frequency Response (1W) | DC ~ 300 khz + 0 -3dB |
| Envelope distortion | Below the measurement limit |
| TIM Strain (Sawtooth method) | Below the measurement limit |
| Slew rate | ± 180 v / μ sec (8 Ω) |
| Rise time | 0.8 μ sec |
| <Equalizer amplifier (Hi-Precision DC servo equalizer)> | |
| Input Sensitivity / Input Impedance (1 kHz) | Phono1, 2 mm : 2.5mV/47k Ω Phono1, 2 mc : 250 μ V/100 Ω Tuner, Aux, Tape play1, 2 : 250mV/27k Ω |
| Phono maximum allowable input (1 kHz, THD 0.01%) | MM:200mV MC:20mV |
| Output Level / Impedance (1 kHz) | Tape rec (PIN) : 250 mv (47k Ω) / 600 Ω |
| Total harmonic distortion factor (20 Hz to 20 kHz at 5 V output) | Phono1, 2 MM : not more than 0.005% Phono1, 2 mc : not more than 0.006% |
| RIAA Deviation (MM, Rec out) | 20 Hz to 300 kHz ± 0.2 dB |
| Signal-to-noise ratio (A network, short circuit) | Phono1, 2 mm : 88 dB or more Phono1, 2 mc : 70 dB or more Tuner, Aux, Tape play1, 2 : 110 dB or higher |
| Phono input equivalent noise (A network, short circuit) |
Phono1, 2 mm : -140dBV Phono1, 2 mc : -142dBV |
| Channel Separation (1 kHz) | Phono1, 2 mm : 60 dB or more Phono1, 2 mc : 50 dB or more Tuner, Aux, Tape play : 80 dB or more |
| Tone control | Bass : ± 6 dB (50 Hz) Treble : ± 6 dB at 10 kHz |
| Filter | Low : 16 Hz (-3dB, 6dB/oct.) |
| Audio Muting | -20dB |
| <General> | |
| Rated power consumption (Electrical Appliance and Material Control Law) | 200W |
| External dimensions | Width 460x Height 160x Depth 404 mm |
| Weight | 13.2kg |