Stereo Power Amplifier Model 250

Marantz (Sound United LLC); Vista, CA

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  • Year
  • 1971–1973
  • Category
  • Audio Amplifier or -mixer
  • Radiomuseum.org ID
  • 113578

 Technical Specifications

  • Number of Transistors
  • 45
  • Main principle
  • Audio-Amplification
  • Wave bands
  • - without
  • Details
  • Hi-Fi equipment
  • Power type and voltage
  • Alternating Current supply (AC) / 100; 120; 220 Volt
  • Loudspeaker
  • - This model requires external speaker(s).
  • Power out
  • 250 W (300 W max.)
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Stereo Power Amplifier Model 250 - Marantz Sound United LLC;
  • Shape
  • Book-shelf unit.
  • Dimensions (WHD)
  • 15.375 x 6.125 x 9.5 inch / 391 x 156 x 241 mm
  • Notes

  • A hi-fi stereo power amplifier with output power of 125 watts RMS per channel into 8 ohms or 150 watts RMS per channel into 4 ohms housed in a metal case (a wooden outer case optional). With a power meter and a rotary meter control switch for each channel, RCA phono sockets for input, terminals for 1 pair of loudspeakers and an AC outlet.

    Specification  
    Power Output per channel,
    both channels driven,
    at rated distortion, 20Hz-20kHz    		   Into 4Ω  : 150W RMS
      Into 8Ω  : 125W RMS
      Into 16Ω : 64W RMS
    Total Harmonic Distortion
    at or below rated power, 20Hz-20kHz    		 < 0.1%
    Intermodulation Distortion
    at or below rated power, SMPTE, 20Hz-20kHz    		 < 0.1%
    Frequency Response 2Hz-100kHz, +0dB -1.5dB
    20Hz-20kHz, ±0.1dB
    Input Sensitivity 1.5 Volts for rated power
    Input Impedance 100kΩ
    Damping Factor > 100 at 8Ω
    Total Noise  < 106dB below rated power into 8Ω

    Power Requirements
    120V AC 50/60Hz
    Split primary windings permit easy conversion from 120 volt to 220 volt operation. Can also be converted to 100 volt operation.

    Made in USA

  • Net weight (2.2 lb = 1 kg)
  • 28 lb 0 oz (28 lb) / 12.712 kg
  • Price in first year of sale
  • 495.00 $
  • Mentioned in
  • - - Manufacturers Literature (1971 Marantz Brochure models 120, 3300, 250, 110, 1030)
  • Literature/Schematics (1)
  • -- Original prospect or advert (1973 Marantz We Sound Better catalogue)
  • Literature/Schematics (2)
  • - - Manufacturers Literature (Service manual Marantz 250 Two Fifty)
  • Author
  • Model page created by Emilio Ciardiello. See "Data change" for further contributors.

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