Yamaha A-550

Data

General

• Manufacturer: Yamaha
• Model: A-550
• Years of manufacture: 1979-1981
• Type: Integrated amplifier
• Remote control: no
• Power consumption: 260 watts
• Dimensions: 435 mm × 112 mm × 338 mm (W × H × D)
• Weight: 7.8 kg
• Color: silver and black
• Original price approx.: 598 DM

Connections

• Number of inputs:
• Phono, Tuner, 2 × Tape

• Number of outputs:
• 2 × speaker, 2 × rec-out, headphones

Specifications

• Continuous power (at distortion factor)
  • 8 Ohm: 2 × 53 Watt
  • 4 Ohm:
• Dynamic power
  • 8 Ohm:
  • 4 Ohm:
• Total harmonic distortion: 0.005 %
• Attenuation factor: 50
• Input (Sensitivity/Impedance)
  • Phono 2.5 mV/47 kOhm
  • Tape, Tuner, 150 mV/47 kOhm
• Output (level/impedance)
  • Rec-Out 150 mV/600 Ohm
• Frequency response: 4-70,000 Hz
• Tone control:
  • Bass: yes

treble: yes

• Loudness: adjustable
• Subsonic: fixed with phono
• Mute: no
• Direct/Line-Straight: no
• Ripple distance (shorted):
• Stereo Channel Separation:
• Signal-to-noise ratio: 104 dB

Special Features

• Mono/Stereo switchable
• High-Filter
• Record selector

Remarks

Other models in the same series:

• A-450
• A-550

Successor model:

• A-560

Pictures

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Reports

Ran an A-550 myself for years in the early eighties. It is a tonally inconspicuous middle class amplifier with usable phono input and solid construction. At that time I used it with a pair of Onkyo SC-60MK2 I used it. The main input signal was a Pioneer PL-516 with Shure M95HE. This combination satisfied me for years, even at higher volumes. even at higher volumes. At that time the P/L ratio was quite favourable. Today it is used but too high imho. More than 100€ in technically perfect condition would be I would not spend for it. Who does not "believe" in amplifier sound, will hardly spend more than this or a similar model from another company.