Stereophonic Receiver 2275

Marantz (Sound United LLC); Vista, CA

  • Year
  • 1975
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 112585

Click on the schematic thumbnail to request the schematic as a free document.

 Technical Specifications

  • Number of Transistors
  • Semiconductors present.
  • Main principle
  • Superhet with RF-stage
  • Wave bands
  • Broadcast (BC) and FM or UHF.
  • Details
  • Hi-Fi equipment
  • Power type and voltage
  • Alternating Current supply (AC) / 110; 120; 220; 240 Volt
  • Loudspeaker
  • - This model requires external speaker(s).
  • Power out
  • 150 W (undistorted)
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Stereophonic Receiver 2275 - Marantz Sound United LLC;
  • Shape
  • Book-shelf unit.
  • Dimensions (WHD)
  • 439 x 137 x 366 mm / 17.3 x 5.4 x 14.4 inch
  • Notes
  • A hi-fi stereo receiver with an AM/FM stereo tuner with analogue dial and an integrated amplifier with power output of 2 x 75 watts RMS into 4 ohms or 8 ohms, housed in a metal case with silver or black fascia (wooden case optional). With Signal Strength/Dolby and FM Tuning meters, jacks for headphones and Dubbing, Gyro Touch tuning, Bass, Mid and treble tone controls, Tone Mode rotary switch, Dolby FM, Hi Blend, Low & Hi Filters, Loudness, Mono, FM Muting, Main & Remote Speakers. On the back, an AM ferrite bar antenna, AM and FM antennae terminals, RCA phono sockets for input phono (MM) and Aux, for input/output 2 Tapes, for FM Quadradial output, Main In/Pre Out, Muting Level adjuster, terminals for 2 pairs of loudspeakers, switched and unswitched AC outlets.

    Specification  
    Preamplifier Section  
    Phono Dynamic Range 98dB
    Input Sensitivity/Impedance  
     Phono
     Line Level
    1.8mV/47kΩ
    180mV/50kΩ
    Pre-Out Level/Impedance 1V/900Ω
    Phono Frequency Response 30Hz-15kHz ±1dB (to RIAA curve)
    Aux Signal/Noise -82dB
    Filters  
     Hi Filter
     Low Filter
    5kHz, 6dB/Octave
    100Hz, 6dB/Octave
    Amplifier Section  
    Rated Power Output (Continuous average
     power per channel, all channels driven)
     20Hz-20kHz, THD 0.25%
     
      Into 4Ω
      Into 8Ω
      Into 16Ω
    75 Watts
    75 Watts
    40 Watts
    Frequency Response 20Hz-20kHz ±1dB
    Damping Factor 60
    Headphones Output 0.5V
    Input Sensitivity for MAIN IN Front/Rear 1V for Rated Power Output
    FM Section  
    Selectivity (Alternate Channel)  80dB
    Capture Ratio 1.5dB
    Stereo Separation 42dB at 1kHz
    Total Harmonic Distortion 0.25% (Mono), 0.35% (Stereo)
    Frequency Response 30Hz-15 kHz ±1.0dB
    Total Spurious Rejection > 100dB
    Image Rejection > 100dB
    IF Rejection > 100dB
    Antenna Impedance 75Ω or 300Ω
    AM Section  
    Sensitivity 20µV
    Selectivity > 45dB ±20kHz
    Image Rejection > 60dB

    Versions/Power Requirements
    120V 60Hz
    110/120/220/240V 50/60Hz switchable internally

    Power consumption:  330 watts

    AM/FM-Stereo-Receiver mit 2 x 75 Watt RMS an 4 oder 8 Ω, 2 x 40 W RMS an 16Ω.
    Klirrfaktor 0,25%
    Bandbreite 20 - 20.000 Hz (-1 dB)
    PLL UKW Stereo Decoder, TB-Überspielmöglichkeit, LS-Umschaltvorrichtung für LS-Anschlüsse von 4 - 16 Ohm.

    Designed in USA, Produced in Japan

  • Net weight (2.2 lb = 1 kg)
  • 17.7 kg / 38 lb 15.8 oz (38.987 lb)
  • Price in first year of sale
  • 1,348.00 DM
  • Mentioned in
  • -- Original prospect or advert (1975 Marantz Stereo Receivers catalogue)
  • Literature/Schematics (1)
  • -- Original-techn. papers.
  • Literature/Schematics (2)
  • - - Manufacturers Literature (Service manual Marantz 2275)
  • Literature/Schematics (3)
  • - - Manufacturers Literature (Handbook of Instructions Marantz 2275)

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