Technics SU-V7X
¥ 79,800 (around 1986)
Commentary
Integrated amplifier based on SU-V10X to pursue cost performance.
The pre-drive stage employs a gain control circuit with a high-performance operational amplifier. This eliminates the adverse effect of the output stage caused by the speaker load that fluctuates during actual driving and suppresses the generation of distortion in the pre-drive stage itself.
By installing a power linear circuit, the linearity of the output stage is improved, and high-quality speaker drive is realized.
The computer drive eliminates transient distortion in the output stage in real time by the microcomputer. Linear feedback reduces range of audibility distortion by constructing an independent feedback circuit that enables infinite amplification in the NFB loop. In addition, switching distortion and crossover distortion are eliminated by a bias circuit independent of the signal system.
The power supply section is equipped with a low-loss, high-capacity power transformer. oxygen-free copper wire is used for the winding, and the regulation is greatly improved by adopting a unique perfectly aligned winding that can wind wires 20% thicker than conventional wires at high density.
The smoothing power capacitor uses a low ESR (equivalent series resistance) type with very low loss.
The output stage and power supply section are integrated into a concentrated power block to eliminate high frequency distortion caused by electromagnetic radiation.
Phono equalizer is MC basic design.
The tone control has a two stage turnover switching function.
Equipped with video input terminal, composite signal connection is possible.
The front panel also has video / audio input terminals.
Equipped with a Rec Mode Selector that allows you to choose your recording source independently of the source you are listening to.
Equipped with terminals for external devices that are convenient for connecting graphic equalizers, etc.
Model Rating
Type | Integrated amplifier |
Effective output (20 Hz to 20 kHz) | 120W + 120W (6 ohm, 0.005%) |
Total harmonic distortion factor | 0.002% (Rated Output -3dB, 20 hz to 20 khz) |
Frequency characteristic | 20 Hz ~ 20 kHz + 0 -0.1 dB 0.5 Hz ~ 170 kHz + 0 -3dB |
Signal-to-noise ratio | 110dB(IHF-A) |
Damping factor | 80 (8 Ω) |
Load impedance | Main or remote : 4 Ω ~ 16 Ω Main and remote : 8 Ω ~ 16 Ω |
Input Sensitivity / Impedance | Phono MM : 2.5mV/47k Ω Phono MC : 170 μ V/220 Ω Tuner, Aux, Tape : 150mV/18k Ω |
Phono SN ratio | MM : 88 dB (2.5 mV input) MC : 72 dB (250 μ V Input) |
Phono frequency characteristics | 20 Hz to 20 kHz, RIAA ± 0.2 dB |
Tone control | Bass : ± 10 dB (50 Hz) Treble : ± 10 dB (20 kHz) |
Turnover frequency | Bass : 250 Hz, 500 Hz Treble : 2 kHz, 4 kHz |
Loudness control (VR-30dB) | +9dB(50Hz) |
Pwer | 100 VAC, 50Hz/60Hz |
Power consumption | 193W |
External dimensions | Width 430x Height 142x Depth 385 mm |
Weight | 10.6kg |