Technics SU-V5A
¥ 64,800 (released in October 1982)
Commentary
This new class A amplifier is equipped with a computer drive circuit in addition to a synchronized bias circuit and linear feedback circuit to eliminate the transient crossover distortion caused by music signal difference politics.
Equipped with a computer drive monitor that can confirm the operating status of the circuit at a glance.
The Auto LED and the Computer Drive green sign turn on approximately 20 seconds after the power switch is turned on, and the circuit enters into stable operation.
Uses a concentrated power block that virtually eliminates high-frequency distortion caused by electromagnetic radiation.
In this system, the output stage and power supply section, which handle large currents, are arranged in a concentrated manner with an ingenious structure, so that the adverse effects of electromagnetic fields are completely eliminated.
By adopting a high-efficiency radiator using a heat pipe, the heat generated by the output transistor is efficiently dispersed.
Equipped with a pure electronic protection circuit utilizing a microcomputer, it detects DC leakage, short circuit of the speaker terminal, abnormal temperature rise inside the amplifier, etc., and disconnects the speaker by relay.
Uses a high gain phono equalizer that can be used directly by the MC cartridge.
The circuit has a simple circuit configuration using an operational amplifier IC with extremely low noise and realizes a gain switching system between MM and MC.
Using tone control using main NF, high SN ratio and low distortion factor are realized.
Equipped with an external device dedicated connection terminal convenient for connection of graphic equalizer, etc.
A remote action switch is used for the Input and Recout selector switches.
Model Rating
| Type | Integrated DC amplifier |
| <Overall characteristics of Tuner, Aux → SP out> | |
| Effective output (20 Hz to 20 kHz) | 60W + 60W (8 Ω, 0.005%) |
| Total harmonic distortion factor | 0.004% (Rated Output -3dB, 20 hz to 20 khz) |
| TIM | Unmeasurable |
| Output bandwidth | 5 Hz ~ 60 kHz (THD 0.02%) |
| Frequency characteristic | 20 Hz ~ 20 kHz + 0 -0.2 dB 7 Hz ~ 150 kHz + 0 -3dB |
| Signal-to-noise ratio (IHF-A) | 102 dB (straight DC) |
| Residual noise | 0.6 mV (Straight DC) |
| Damping factor | 70 (8 Ω) |
| Load impedance | Main or remote : 8 Ω ~ 16 Ω |
| <Other characteristics> | |
| Input Sensitivity / Impedance | Phono MM : 2.5mV/47k Ω Phono MC : 200 μ V/220 Ω Tuner, Aux, Tape : 150mV/22k Ω |
| Phono SN ratio | MM : 83 dB (2.5 mV input) MC : 65 dB (250 μ V Input) |
| Phono frequency characteristics | 20 Hz to 20 kHz, RIAA ± 0.8 dB |
| Tone control | Bass : ± 10 dB (50 Hz) Treble : ± 10 dB (20 kHz) |
| Filter | Subsonic : 30 Hz, -6dB/oct. |
| Loudness control | + 9 dB (50 Hz, Volume -30dB) |
| <General> | |
| Pwer | 100 VAC, 50Hz/60Hz |
| Power consumption | 115W |
| External dimensions | Width 430x Height 109x Depth 290 mm |
| Weight | 6.5kg |