Technics SU-C01
¥ 50,000 (around 1979)
Commentary
Stereo preamplifier with built-in pre-preamp for MC cartridge.
The first stage of the MC pre-preamp consists of a low-noise transistor with complimentary service push-pull to achieve low noise, low distortion and low output impedance.
A newly developed low-noise transistor is used in the first stage of the phono equalizer section, and the SN ratio is improved by using a current mirror load differential amplifier that can select an operating current that minimizes the distortion level.
In addition, the equalizer element uses metal film resistance within ± 1% deviation and polypropylene capacitor within ± 2% to obtain excellent characteristics.
In this mode, the frequency response is flat and the circuit is composed of a low-noise IC.
The power transformer is housed in an iron case with excellent magnetic shielding effect, and a low-noise Zener diode is also used in the constant voltage circuit to minimize the noise generated in the power supply line and ensure a low noise design.
It comes with a one touch connection cord that directly connects the power amplifier, tuner and SU-C01 via the shortest path.
Precision finish die-cast cabinet is adopted.
Equipped with a subsonic filter.
Model Rating
Type | Stereo preamplifier |
Input Sensitivity / Impedance | Phono MM : 2.5mV/47k Ω Phono MC : 100 μ V/47 Ω Tuner, Aux, Tape : 150mV/47k Ω |
Total harmonic distortion rate (20 Hz to 20 kHz) | Phono MM : 0.005% (VR -20dB, 3 v output) Tuner, Aux, Tape : 0.003% (VR max, 3 v output) |
Signal-to-noise ratio (IHF-A) | Phono MM:88dB Phono MC : 78 dB at 250 μ V input Tuner, Aux, Tape : 100 dB |
Frequency characteristic | Phono MM, MC : 20 Hz to 20 kHz, RIAA deviation ± 0.2 dB Tuner, Aux, Tape : 20 Hz to 20 kHz + 0 -0.05 dB 2 Hz ~ 250 kHz + 0 -3dB |
Phono maximum allowable input (1 kHz, RMS) |
Phono MM:200mV Phono MC:8mV |
Rated output | Output : 1 V (rated), 7 V (maximum) Rec out:150mV |
Tone control | Bass : ± 10 dB (50 Hz) Treble : ± 10 dB (20 kHz) |
Subsonic filter | 30 Hz, -12dB/oct. |
High filter | 7 kHz, -6dB/oct. |
Loudness control (-30dB) | +6dB(100Hz) |
Pwer | 100 VAC, 50Hz/60Hz |
Power consumption | 8W |
External dimensions | Width 297x Height 49x Depth 241 mm |
Weight | 3.0kg |