Hitachi HA-4700

Data

General

• Manufacturer: Hitachi
• Model: HA-4700
• Type: Integrated amplifier
• Years of manufacture: 1980 - 1982
• Made in: Japan
• Color: Silver
• Remote control: no
• Power consumption: 430 W
• Dimensions (WxHxD): 435 x 83 x 299 mm
• Weight: 6.3 kg
• Original price approx.: 548 DM

Connections

• Number of inputs:
  • Phono MM: 2.5 mV / 47 kOhm, 250 mV max.

Phono MC: 0.15 mV / 100 Ohm, 25 mV max. Tuner: 150 mV / 47 kOhm Aux: 150 mV / 47 kOhm

• • Tape Play 1, 2: 150 mV / 47 kOhm
  • Tape Play DIN 1, 2: no
• Number of outputs:
  • Tape Rec 1, 2: 150 mV / 47 kOhm
  • Tape Rec DIN 1, 2: no
  • Headphones
  • 2 pairs of loudspeakers

Technical Data

• Continuous power (at distortion factor)
  • 8 Ohm: 2x 50 W at 0.02% (DIN)
  • 4 Ohm: 2x 50 W at 0.02% (DIN)
• Total harmonic distortion: <0.02%
• Intermodulation distortion: <0.03%
• Attenuation factor: 40 dB at 1 kHz, 8 Ohm
• Frequency Response:
  • Phono RIAA: ±0.3 dB, 30 - 15'000 Hz
  • High level: +0.5 to -3.0 dB, 10 - 70'000 Hz
• Signal-to-noise ratio:
  • Phono MM: 90 dB
  • Phono MC: 73 dB
  • High level: 105 dB
• Tone control:
  • Bass: ± 8 dB at 100 Hz

Treble: ± 8 dB at 10 KHz

• Loudness: + 6 dB (100Hz), + 4 dB (10kHz)
• High Filter: No
• Low Filter (Subsonic): 20 Hz, - 6 dB / octave
• Mute: no

Special Features

• Super-linear bias amplifier with Class B output stage
• LED power indicators

Remarks

• Other models in the same series:
• Hitachi HA-2700
• Hitachi HA-3700
• Hitachi HA-4700
• Hitachi HA-5700
• Hitachi HA-7700
• Hitachi HA-8700

Pictures

• Extract from brochure: Hitachi HA-2700, HA-3700, HA-4700, HA-5700, HA-8700