• Country
• United States of America (USA)

• Manufacturer / Brand
• 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.

• Number of Transistors
• Semiconductors present.

• Semiconductors
• HA1156W BA312

• 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)

• Other Models

• Here you find 569 models, 560 with images and 92 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Marantz (Sound United LLC); Vista, CA