Pioneer M-25

Data

General

• Manufacturer: Pioneer
• Model: M-25
• Model range: Series 20
• Type: Class AB power amplifier
• Years of manufacture: 1976 - 1981
• Made in: Japan
• Color: Metal Silver / Black
• Power consumption: 800 W
• Dimensions: 420 x 153 x 370 mm (WxHxD)
• Weight: 22.5 kg
• Original price approx.: 200'000 Yen (Japan 1980), 3'000 DM

Connections

• Number of inputs:
  • Input sensitivity: 1V/50kOhm.
• Number of outputs:
  • 1 loudspeaker pair

Technical Data

• Continuous power Class AB (Class A operation up to 3W)
  • 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)
• Attenuation factor: 100 / 8 Ohm
• Frequency response: 5Hz - 200kHz, +0 -1dB (at 1W)
• Power bandwidth: 5Hz - 100kHz (THD 0.05%)
• Signal to noise ratio: 120 dB
• Channel separation:
  • 1kHz: 105 dB

100kHz: 70 dB

Special Features

• Pioneer M-25 Class A power amplifier in "open design".

Notes

• 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

• Excerpt from Japan advertisement: Pioneer M-25

Reports

• Review at Hifi Legends [[1]]

Links

• External link: "Audio Database, Japan" website: [2]