Audio Database

The

Technics SU-V3
49,800yen(around the 1981 time)

Description
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Integrated amplifier of new class A scheme adoption which carries a linear feedback circuit.

Theoretical value distortion = the linear feedback circuit which realized zero is carried. This circuitry forms an independent feedback circuit which enables an amplification infinite in a NFB loop, and has realized theoretically amplifier which is called the speaker drive without the influence of pure gain and counter-electromotive force without the influence of theoretical value distorted =0, an element, or a power source, or a wire rod and which performs an ideal operation.

Switching distortion is canceled by the synchro bias circuit original with technics.
Usually, in order to acquire a high efficiency ratio, the output stage was always maintained at the active state by supplying a fixed bias to + side - side each output transistor which stops by turns in B class and AB class operation synchronizing with a pause cycle, and the switching distortion resulting from the pause of an output stage is canceled.
Furthermore, in order to make the signal path and the bias-current path become independent, the output stage could save the always suitable operating point, and crossover distortion has also canceled conjointly work of high-speed response diode with ideal square-law characteristics.

The concentrated power block which lost the influence of an electromagnetic radiation as a matter of fact is adopted.
An output stage and a power-source part are unified by this block, and the distortion of the high region by electromagnetic waves is suppressed on the relative-minimum level.

It is the circuit design which employed the effect of the linear feedback circuit also in the tone control circuit efficiently.
Moreover, the defeet switchpoint is also formed although the tone control is considering it as the middle point defeet.

Many properties, such as a crosstalk and an SN ratio, are raised by adopting as each selector switch of Input and Rec out the remote action switchpoint which abandoned unnecessary leading about of a code.

The protection network of a pure electronic formula is carried.

The high light filter and the Subsonic Filter are carried.


Rating of a mode
Form Integrated amplifier
<Tuner, the Aux->SP out overall characteristic>
Effective output (20Hz - 20kHz) 40W+40W (8 ohms, 0.007%)
THD 0.007% (Output-power-3dB, 20Hz - 20kHz)
Output bandwidth (THD 0.02%) 5Hz - 40kHz (8ohms)
TIM Incapable measurement
Remains noise 0.5mV
Dumping factor (8ohms) 40
Load impedance main or remote: 8ohms - 16ohms
<Other properties>
Input sensitivity/impedance Phono man month: 2.5mV / 47kohm
Tuner, Aux, Tape:150mV /, 22kohm
Phono frequency characteristic 20Hz - 20kHz, RIAA}0.8dB
Frequency characteristic 20Hz-20kHz+0 -0.2 dB
2Hz-100kHz+0 -3 dB
SN ratio (IHF-A) Phono MM:82dB
Tuner, Aux, Tape: 100dB
Tone control Bass: }10dB (50Hz)
Treble: }10dB (20kHz)
Subsonic Filter 30Hz-6dB / oct
A high filter 7kHz-6dB / oct
Loudness control + 9dB (50Hz, Volume-30dB)
<Synthesis>
Power source AC100V, 50Hz/60Hz
Power consumption 83W
Dimensions Width 430x height 97x depth of 310mm
Weight 6.0kg