Integrated amplifier which was improved based on AU - D 607F.

Super FF and diamond differential circuit are adopted as a power amplifier part. In addition, the AU - D 607 F Extra has the same circuit as the AU - D 707 F Extra, aiming at a performance of 1 rank up.
In the first stage, we have a differential circuit with constant current adopting dual FET which can pass a large current with low noise, and the second stage has a dual complementary diamond differential circuit which improved dramatically in dynamic characteristics. And, on the power stage, Super FF which further improved completeness is carried. In addition, we are trying to improve the characteristics such as adopting NM - LAPT, which is a high - speed element, for the output transistor.

The power supply unit is a left and right independent power supply system, and the transformer adopts a large transformer excellent in regulation. Moreover, the total 32,800 μF is adopted as the capacitor.

A newly developed Hi-Precision MC / MM compatible equalizer is adopted as the equalizer amplifier part, and RIAA deviation is realized from 20 Hz to 300 kHz ± 0.2 dB.
In the first stage, a low noise · high g m dual FET is used, and push pull drive pure complimentary push pull drive SEPP output with 2 differential stage and current mirror with differential current. And all capacitors of the signal system from the input to the speaker out are eliminated.
Linear servo regulator is adopted as the equalizer exclusive power supply part, and by applying a constant bias current in the circuit, it corresponds to transient load, and it is always possible to supply a clean and stable power supply.

We are trying to simplify and straighten the signal path by adopting heat pipes and three-dimensional wiring.
In addition, NM transistor and NM resistor are used to reduce the magnetic distortion which contaminates the sound.

Speaker terminals use relays for both A and B. The influence of magnetic flux is reduced by adopting a remote control type that eliminates routing of output to the speaker changeover switch.

Two kinds of sources are equipped with independent recording selectors and two circuit tape monitor / copy function.

Subsonic filter is carried.
Detent type volume is adopted.
Large speaker terminal is adopted.
- 20 dB audio muting function is carried.
We adopt real wood's side panel and top panel.
There were two color variations of black and silver.

Effective output 80 W + 80 W
Rated power consumption (Electrical Appliance and Material Control Law) 200 W
External dimensions Width 460 × height 160 × depth 404 mm
weight 13.2 kg

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