Technics SU-3050
¥ 36,800 (around 1975)
Commentary
Pre-main amplifier with microphone circuit for enjoying microphone mixing.
The main amplifier section consists of two ICs for all stages of direct-coupled differential amplifier OCL circuit.
Because the OCL circuit does not degrade the damping factor in the lower range, the speakers can be adequately damped to provide a tighter bass playback. The differential amplifier also eliminates disturbances (temperature fluctuations, power supply changes, noise, etc.) in the form of in-phase inputs.
The equalizer circuit uses a 2-stage direct-coupled IC to increase reliability and provide a wide dynamic range to minimize clip distortion.
Equipped with two tape monitor circuits.
Equipped with a high filter.
Equipped with two speaker outputs.
.JPG)
Model Rating
| Type | Stereo pre-main amplifier |
| Circuit system | All-stage direct coupled differential amplifier OCL circuit |
| Music power | 50W (4 Ω) 44W (8 Ω) |
| Effective output (1 kHz, both channel drive) | 15W + 15W (4 Ω) 14W + 14W (8 Ω) |
| Output Bandwidth (8 ω) | 5 hz to 50 khz -3dB |
| Harmonic distortion factor | 0.8% |
| Signal-to-noise ratio | Phono:74dB |
| Damping factor | 35 (8 Ω) |
| Phono maximum allowable input | 90mV(1kHz) |
| Tone control | Bass : ± 10 dB (50 Hz) Treble : ± 10 dB (10 kHz) |
| High filter | 8 kHz, -6dB/oct. |
| Pwer | 100 VAC, 50Hz/60Hz |
| Power consumption | 38W |
| External dimensions | Width 386x Height 115x Depth 299 mm |
| Weight | 5.7kg |