Yamaha C-4

Data

General

• Manufacturer: Yamaha
• Model: C-4
• Type: Preamplifier
• Years of manufacture: 1979 - 1981
• Made in: Japan
• Color: Black
• Remote control: No
• Power consumption: 50 watts (35 VA)
• Dimensions: 435 x 116 x 376 mm (W x H x D)
• Weight: 8.7 kg
• Original price approx.: 1250,- DM

Connections

• Number of inputs:
  • 2x Phono MM
  • 1x Phono MC
  • 2x Tape
  • Tuner, Aux
• Number of outputs:
  • 2x Pre-Out
  • 2x Rec-Out
  • 1x headphones

Technical Data

• Input (Sensitivity/Impedance)
  • Phono MM: 1.0 mV/100 Ohm/33 KOhm/47 KOhm/68 KOhm/100 KOhm
  • Phono MC: 0.1 mV
  • Tape, Tuner, Aux: 75mV/47 KOhm
• Output (level/impedance)
  • Pre-Out 1V (max. 19 V)/600 Ohm

Rec-Out 75mV (max. 1.3 V)/180 Ohm

• Frequency response: 2 Hz - 1 MHz (-2 dB)
• Phono equalization: RIAA (3180/318/75 µs)
• Tone control
  • Bass: ± 10dB, insert frequency adjustable.

Treble: ± 10dB, insert frequency adjustable

• Loudness: No
• Subsonic: Yes (15Hz)
• Mute: Yes (-20 dB)
• Direct/Line-Straight: Tone-Bypass
• Signal-to-noise ratio (short-circuited): 106 dB

Distortion: <= 0,001% (1 kHz)

• Stereokanaltrennung: 85 dB
• Signalrauschabstand:
• Geräuschspannungsabstand: >136 dB (>= 70 dB Phono MC)
• External voltage spacing:
  • Phono MM: 114 dB

Phono MC: 58 dB AUX/Tape/Tuner: 114 dB

• • Channel deviation: +- 0.2 dB

Special Features

• Low-Filter -12 dB: 15 Hz
• High-Filter -12 dB: 10 kHz
• record selector can be switched off
• separate volume control for the headphone output
• mono/stereo/stereo reversible switchable
• Pre-Outs can be switched off separately
• capacitance and impedance of the Phono-MM inputs adjustable

Notes

• Other models in the same series:
• Yamaha C-2a
• Yamaha C-4
• Yamaha C-6

• Yamaha C-6
• None

• Successor model:
• Yamaha C-50

Pictures

• Image: Yamaha C-4

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Reviews

• The Yamaha C-4 is the preamp to the power amp M-4, it's build quality is very good, everything is metal and sits right where it should. The button lights usually don't fail, meaning you don't have to replace them often, in most cases I think these units still have the orginal lights. The phono preamp is excellent and the sound control options are definitely enough. Very practical are the two pre-outs for two power amplifiers. The preamp 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 is due to a Class-A circuit. Conclusion: The Yamaha C-4 is highly recommended and is an excellent match for the M-4 and M-2 power amplifiers.

Links

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