Technics SU-3200
¥ 55,800 (released in 1973)
Commentary
Pre-main amplifier pursuing low distortion and high stability.
Ultra-low noise transistors are used for both the first and second stages of the equalizer stage, resulting in high gain and low noise.
The main amplifier section uses a fully connected and fully complimentary service OCL circuit configuration. In addition, by driving from the first stage to the voltage amplification stage with a stabilized power supply of ± 32 v, stable characteristics are obtained while suppressing distortion.
The tone control circuit uses an ultra-low noise transistor and consists of an NF-type circuit with less residual noise and distortion.
Stability is also improved by a ± 32 v stabilized power supply.
Left and right independent click stop type volume is adopted.
High-voltage transistors and zener diodes are used in the power supply circuit to improve stability.
Equipped with a circuit to prevent shock sound when power is turned on/off.
Built-in preset volume for audio muting.
Equipped with two tape monitor circuits.
.JPG)
Model Rating
| Type | Stereo pre-main amplifier |
| Circuit system | Fully complimentary service all-stage direct-coupled differential-amplification OCL circuit |
| Music power | 80W (4 Ω) 60W (8 Ω) |
| Effective power (1 kHz, both channel drive) |
23W + 23W (4 Ω) 20W + 20W (8 Ω) |
| Output Bandwidth (8 ω) | 5 hz to 100 khz -3dB |
| Harmonic distortion factor | 0.3% |
| Signal-to-noise ratio | Phono:70dB |
| Damping factor | 70 (8 Ω) |
| Phono maximum allowable input | 210mV(1kHz) |
| Tone control | Bass : ± 11 dB (50 Hz) Treble : ± 11 dB (20 kHz) |
| Low filter | 40 Hz, -6dB/oct. |
| High filter | 8 kHz, -6dB/oct. |
| Pwer | 100 VAC, 50Hz/60Hz |
| Power consumption | 60W |
| External dimensions | Width 410x Height 140x Depth 340 mm |
| Weight | 7.6kg |