Yamaha A-720

Data

General

• Manufacturer: Yamaha
• Model: A-720
• Type: Integrated amplifier
• Years of manufacture: 1985 - 1986
• Remote control: No
• Power consumption: 470 watts (EU)
• Dimensions: 435 x 147 x 399 mm (WxHxD)
• Weight: 10,2 kg
• Color: silver and black
• Original price approx.: 1'000 DM

Connections

• Number of inputs:
  • Phono MM/MC, Tuner, 2x Tape, Aux, CD
• Number of outputs:
  • 3x Speaker, 2x Rec-Out, Headphone

Technical Data

• Continuous power (at distortion factor)
  • 8 Ohm: 2x 105 Watt (0,005%)
  • 4 Ohm: 2x 150 Watt (1%)

• Dynamic power
  • 8 Ohm: 2x 145 Watt
  • 6 Ohm: 2x 180 Watt
  • 4 Ohm: 2x 240 Watt

• Total harmonic distortion: 0,005%
• Attenuation factor: 45
• Input (sensitivity/impedance)
  • Phono MM 2.5 mV /47 kOhm
  • Phono MC 160 µV /220 Ohm
  • CD, Aux, Tape, Tuner 150 mV /47 kOhm
• Output (level/impedance)
  • Rec-Out 150 mV /470 Ohm
• Tone control:
  • Bass: +/- 10dB (20Hz), peak frequency 350 Hz.

treble: +/- 10 dB (20Hz), peak frequency 3500 Hz

• Loudness: adjustable, -40 dB
• Subsonic: switchable, -12dB below 15Hz
• Mute: Yes, -20 dB
• Direct/Line-Straight: tone control can be switched off
• Ripple (short-circuited):
• Stereo channel separation: 65 dB
• Signal-to-noise ratio: AUX/Tape/Tuner: 106 dB, Phono MM 92 dB, Phone MC 76dB

Special Features

• Record Selector
• Mono/Stereo switchable
• Auto-Class A/AB switchable
• Loudspeaker pairs individually controllable

Notes

• Other models in the same series:
• Yamaha A-320
• Yamaha A-420
• Yamaha A-520
• Yamaha A-720
• Yamaha A-1020

• [[Previous model:
• Yamaha A-700

• Successor model:
• Yamaha AX-700

Pictures

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Reports

• Report in "FonoForum" 3 / 1986

• Very powerful amplifier with a beautiful appearance. Even after more than 20 years it is still a real powerhouse, but of course, like most old amplifiers, it has problems with the pots. It should be mentioned that all controls are made of aluminium.