Yamaha A-420

Data

General

• Manufacturer: Yamaha
• Model: A-420
• Year of manufacture: 1985 - 1986
• Made in: Japan
• Type: Integrated amplifier
• Remote control: No
• Power consumption: 290 W
• Dimensions: 435 x 112 x 327 mm (W x H x D)
• Weight: 6.2 kg
• Color: silver or black
• Original price approx.: 500,- DM

Connections

• Number of inputs:
  • Phono MM/MC, Tuner, Tape, Aux, CD
• Number of outputs:
  • 2x speaker, Rec-Out, Headphone

Technical Data

• Continuous power (at distortion factor)
  • 8 Ohm: 2x 50 Watt (0,015 %)
  • 4 Ohm: 2x 70 Watt (1 %)
• Dynamic power
  • 8 Ohm: 85 W

4 Ohm: 115 W

• Total harmonic distortion: 0.007 %
• Attenuation factor: 50 (1 kHz, 8 Ohm)
• Input (Sensitivity/Impedance)
  • Phono MC: 160 µV/100 Ohm
  • Phono MM: 2.5 mV/47 kOhm
  • Aux/Tape/Tuner: 21 mV
• Output (level/impedance)
  • Rec Out (tape recording): 150 mV/600 Ohm
  • Headphones: 0.7 V/8 ohms (output impedance: 220 ohms).
• Frequency response:
  • Aux/Tape/Tuner: 20 - 20,000 Hz +0/-0.5 dB
  • Main In: 20 - 20,000 Hz +0/-0.5 dB
• Tone control:
  • Bass: Yes, ± 10 dB (20 Hz).
  • Treble: Yes, ± 10 dB (20 kHz)
• Loudness: Adjustable
• Subsonic: No
• Mute: No
• Direct/Line-Straight: No
• Ripple (shorted):
• Stereo Channel Separation:
  • Phono MM/Aux/Tape (crosstalk attenuation): 80 dB (40 Hz); 60 dB (1 kHz); 40 dB (10 kHz).
• Signal-to-noise ratio:

Special Features

Remarks

Other models in the same series:

• A-320
• A-420
• A-520
• A-720
• A-1020

Previous model:

• A-400

Successor model:

• AX-400

Pictures

Reviews

• Stereoplay 6/1986, p. 33
• Stiftung Warentest (for hifi circles perhaps a little strange) at the time: quality rating "good".