Yamaha C-4 specifications

Brand : Yamaha

General

Connections

Tech nical data

Special equipment

Input (Sensitivity/Impedance)
- Phono MM: 1.0mV/100 Ohm /33 kOhm /47 kOhm /68 kOhm /100 kOhm
- Phono MC: 0.1mV
- Tape, Tuner, Aux: 75mV/47 kOhm
Output (level/impedance)
- Pre-Out 1V (max. 19 V)/600 Ohm
- Rec-Out 75mV (max. 1.3V)/180 Ohm
Frequency response: 2 Hz - 1 MHz (-2 dB)
Phono equalization: RIAA (3180/318/75 µs)
Tone control
- Bass: ± 10dB, input frequency adjustable
- Treble: ± 10dB, Adjustable operating frequency
Loudness: No
Subsonic: Yes (15Hz)
Mute: Yes (-20 dB)
Direct/Line-Straight: Tone-Bypass
Ripple voltage Distance (short-circuited): 106 dB
Total harmonic Distortion: <= 0.001% (1 kHz)
Stereo channel separation: 85 dB
Signal-to-noise ratio:
Noise-to-voltage ratio: >136 dB (>=70 dB Phono MC)
External voltage ratio:
- Phono MM: 114 dB
- Phono MC: 58 dB
- AUX/Tape /Tuner: 114 dB
- Channel deviation: +- 0.2dB

The Yamaha C-4 is the preamplifier for the M-4 power amplifier. Its workmanship is very good, everything is made of metal and sits exactly where it should be. The illumination of the buttons usually does not fail, i.e. you do not have to replace them often, in most cases I think that these devices still have the original lights. The phono preamp is excellent and the possibilities of sound control are definitely enough. The two pre-outs for two power amplifiers are very practical. The preamplifier is very heavy, which again speaks for its good workmanship. The C-4 gets quite warm when it is in operation, which according to oral tradition should be due to a Class-A circuit. Conclusion: The Yamaha C-4 is highly recommended and fits perfectly with the power amplifiers M-4 and M-2.

Yamaha C-4