Pioneer A-27

Data

General

• Manufacturer: Pioneer
• Model: A-27
• Model range: Series 20
• Type: Class AB integrated amplifier
• Years of manufacture: 1978 - 1981
• Manufactured in: Japan
• Color: Metal Silver / Black
• Power consumption: 980 W
• Dimensions: 454 x 167 x 468 mm (WxHxD)
• Weight: 24.7 kg
• Original price approx.: 3'200 DM

Connections

• Number of inputs:
  • Phono 1 MM: 2.5mV/100 Ohm, 10 kOhm, 25 kOhm, 50 kOhm, 100 kOhm (selectable 100pF, 200pF, 300pF, 400pF, 500pF), max. 300 mV.
  • Phono 2 MC: 0.250mV/100 Ohm, max. 30 mV
  • Tuner, AUX: 150mV / 50kOhm
  • Tape Play 1, 2: 150mV / 50kOhm
  • Main In:
• Number of Outputs:
  • Tape Rec 1, 2: 150mV / 1kOhm.
  • Pre-Out:
    • THD (5Hz - 30kHz) 0.005% at 1V
    • THD (5Hz - 30kHz) 0.01% at 15V)
  • 2 pairs of speakers
  • Headphones

Technical Data

• continuous power Class AB (Class A operation up to 30W)
  • 8 Ohm: 2 x 120W (5Hz - 30kHz, THD 0.01%)
  • 4 Ohm: 2 x 120W (5Hz - 20kHz, THD 0.02%)
• Dynamic power
  • 8 Ohm:
  • 4 Ohm:
• Total harmonic distortion: 0.01%
  • THD : < 0.01% (10Hz...30kHz, 8 Ohm, nominal power)
    • < 0.01% (10Hz...30kHz, 8 Ohm, 60W)
    • < 0,007% (10Hz...30kHz, 8 Ohm, 1W)
• Dämpfungsfaktor: 70 (5Hz - 30kHz, 8ohm)
• Frequenzgang: 5 Hz - 200 kHz, +0 -1dB (bei 1W)
• Leistungsbandbreite: 5 Hz - 100 kHz (THD 0.05%)
• Signalrauschabstand: 120 dB
• Kanaltrennung:
  • 1kHz: 105 dB
  • 100kHz: 70 dB
• Signalrauschabstand:
  • >91dB (Phono MM)
  • > 80dB (Phono MC)
  • > 100dB (Tuner, Tape, Aux).
• Tone control:
  • Bass 50 Hz: ± 4 dB

Bass 100 Hz: ± 5 dB Tweeter 10 kHz: ± 5 dB Tweeter 20 kHz: ± 4 dB

• Low Filter: 15Hz, 6 dB/octave, 12dB/octave
• Muting: 0 dB, - 20 dB

Special Features Pioneer A-27 Class AB integrated amplifier: For many the first real high-end amplifier.

• Pre- and power amplifier can be separated

Remarks

• Other models in the same series:
  • Pioneer C-21
  • Pioneer M-22
  • Pioneer D-23
  • Pioneer U-24
  • Pioneer M-25
  • Pioneer F-26
  • Pioneer A-27
  • Pioneer F-28
  • Pioneer PL-C 590

Pictures

• Image: Pioneer A-27

• Picture: Pioneer A-27 backside

Reviews

• Review at Good Old Hifi: [1]

• Report at "Mackers": [2]

Links

• External link: "The Vintage Knob" website: [3]

• External link: "Audio Database, Japan" website: [4]</0,007%>