Audio Database

The

Technics SU-V7X
79,800yen(around the 1986 time)

Description
@
Integrated amplifier which investigated cost performance for SU-V 10X with the base.

The ill effect from the output stage resulting from the speaker load intensity which has adopted the stream composition and is changed at the time of a real drive in the gain control circuits which formed highly efficient operational amplifier in the predrive stage is eliminated, and the distorted occurrence in the predrive stage itself is suppressed.

By carrying a power linear circuit, the linearity in an output stage is improved and the high-definition speaker drive is realized.
The microcomputer has canceled the transitional distortion of an output stage in real time by computer drive. Moreover, by linear feedback, the independent feedback circuit which enables an infinite amplification is constituted in a NFB loop, and distortion of an audible region is reduced. Furthermore, switching distortion and crossover distortion are canceled by the bias circuit made to become independent of a signal system.

The power transformer which is proud of a low loss and large capacity is carried in the power-source part. An oxygen-free-high-conductivity-copper line is used for a coil, and the regulation is sharply improved by adopting the original full sort coil which can coil a bold line by a high-density 20% or more conventionally.
Very little low ESR (equivalent series resistance) type of a loss is adopted as the power source capacitor for smooth.

The concentrated power block which unified the output stage and the power-source part skillfully is adopted, and high ˆζ˜c by electromagnetic radiation is canceled.

The phone equalizer part serves as MC basic design.

The 2 steps of turnover change functionality is carried in the tone control.

The video input termination is carried and an interconnection of a composite signal is possible.

The image / voice-input termination is carried also in the front panel.

Apart from the source currently heard, the Lec mode selector which can choose the sound-recording source freely is carried.

The termination only for an external equipment convenient for an interconnection of a graphic equalizer etc. is carried.

The Rear
The cross section of a full sort coil The contact button part of a real panel

Rating of a mode
Form Integrated amplifier
Effective output (20Hz - 20kHz) 120W+120W (6 ohms, 0.005%)
THD 0.002% (Output-power-3dB, 20Hz - 20kHz)
Frequency characteristic 20Hz-20kHz+0 -0.1 dB
0.5Hz-170kHz+0 -3 dB
SN ratio 110dB(IHF-A)
Dumping factor 80 (8ohms)
Load impedance main or remote: 4ohms - 16ohms
main and remote: 8ohms - 16ohms
Input sensitivity/impedance Phono man month: 2.5mV / 47kohm
Phono MC: 170 microvolts/220 ohms
Tuner, Aux, Tape:150mV /, 18kohm
Phono SN ratio man month: 88dB (2.5mV input)
MC: 72dB (250-microvolt input)
Phono frequency characteristic 20Hz - 20kHz, RIAA}0.2dB
Tone control Bass: }10dB (50Hz)
Treble: }10dB (20kHz)
Turnover frequency Bass: 250Hz, 500Hz
Treble: 2kHz, 4kHz
Loudness control (VR-30dB) +9dB(50Hz)
Power source AC100V, 50Hz/60Hz
Power consumption 193W
Dimensions Width 430x height 142x depth of 385mm
Weight 10.6kg