Technics SU-9200
¥ 98,000 (around 1975)
Commentary
Control center for a wide range of cartridges by capacitance switching circuit, etc.
In addition to the resistance of the equalizer circuit, it is also possible to change the capacitance of the equalizer circuit. This improves the performance of the cartridge and allows playback with excellent characteristics. There are three levels of resistance and two levels of capacitance.
The Phono2 is also equipped with an input sensitivity adjustment function.
An allowable input of 520 mVrms is achieved by the high power factor of the output stage and the constant voltage power supply of ± 42 V.
The constant voltage power supply provides a stable voltage even when the primary AC line voltage changes, eliminating interference through the power supply.
The output-stage consists of a differential-amplifier circuit using a low-noise PNP transistor at the first stage, and the output-stage is a 3-stage direct connection structure with a perfect complimentary service SEPP circuit to suppress the occurrence of crossover distortion and switching distortion.
Equipped with 11 contact rotary switch type NF tone control.
The circuit configuration is a 3-stage direct-coupled system with a differential-amplified circuit at the first stage and a SEPP circuit with complete complimentary service class A operation at the output-stage. The turnover frequency can be switched between two stages at low and high temperatures.
It also has a defeat switch.
Equipped with a 26-step switch-type attenuator for accurate volume control.
Equipped with -12dB/oct active low / high filter.
Both low and high can be adjusted by 2 steps.
Equipped with muting circuit to prevent shock sound when power is on/off.
It is equipped with two tape monitor circuits that can be dubbed mutually.
Model Rating
Type | Stereo control amplifier |
Output Voltage / Impedance | Rating : 1V/500 Ω Maximum : 10V/500 ohm |
Input Sensitivity / Impedance | Phono1 : 2mV/25k Ω, 50k Ω, 100k Ω Phono2 : 2 to 10mV/25k Ω, 50k Ω, 100k Ω Tuner, Aux1, 2 : 100mV/47k Ω |
Phono maximum allowable input | 520 mv (rms, 1 khz) |
Total harmonic distortion factor | 0.05% |
Signal-to-noise ratio | Phono:70dB Tuner, Aux : 90 dB |
Frequency characteristic | Phono : RIAA standard curve ± 0.25 dB Aux : 7 Hz to 110 kHz + 3 -0dB |
Tape Monitor 1, 2 | Playback : 100mV/47k Ω Rec out : 100mV/500 Ω |
Tone control | Bass : ± 7.5 dB (50 Hz) Treble : ± 7.5 dB (20 kHz) |
Turnover frequency | Bass : 125 Hz, 500 Hz Treble : 2 kHz, 8 kHz |
Low filter | 15 Hz, -12dB/oct. 30 Hz, -12dB/oct. |
High filter | 10 kHz, -12dB/oct. 15 kHz, -12dB/oct. |
Muting | -20dB |
Pwer | 100 VAC, 50Hz/60Hz |
Power consumption | 9W |
External dimensions | Width 450x Height 173x Depth 266.5 mm |
Weight | 6.8kg |