• Country
• United States of America (USA)

• Manufacturer / Brand
• Marantz (Sound United LLC); Vista, CA

• Year
• 1973–1976 ?

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 178284

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

• Number of Transistors
• Semiconductors present.

• Semiconductors

• Main principle
• Superheterodyne (common)

• Wave bands
• Broadcast (BC) and FM or UHF.

• Details
• Other Combination - see Notes

• Power type and voltage
• Alternating Current supply (AC) / 110; 120; 220; 240 Volt

• Loudspeaker
• - This model requires external speaker(s).

• Power out
• 200 W (unknown quality)

• Material
• Metal case

• from Radiomuseum.org
• Model: Stereo 2 + Quadradial 4 Receiver 4240 - Marantz Sound United LLC;

• Shape
• Chassis only or for «building in»

• Dimensions (WHD)
• 441 x 137 x 385 mm / 17.4 x 5.4 x 15.2 inch

• Notes
• The Marantz Model 4240 is a high quality stereo + quadradial receiver. The model 4240 incorporates Marantz's exclusive Vari-matrix circuit which simulates 4-channel sound from normal 2-channel stereo programs, and is capable or reproducing 4-channel sound from any matrix encoded source. The 4240 will also reproduce any discrete 4-channel program as well as regular stereo and monaural programs.
  An optional plug-in decoder adapts the 4240 for any specific matrix system such as Columbias SQ.
  Specifications: FM tuning range: 88 to 108 MHz, AM tuning range: 540 to 1605 KHz, Power output: 68 watts into 8 ohms (17 watts x 4), Damping factor: 20 (2 channel), 40 (4 channel).

• Net weight (2.2 lb = 1 kg)
• 15.1 kg / 33 lb 4.2 oz (33.26 lb)

• Price in first year of sale
• 1,200.00 DM

• Source of data
• - - Data from my own collection

• Mentioned in
• Funk-Technik (FT) (21/1973, S. 798 / Neuvorstellung, Messe Berlin)

• Author
• Model page created by Karlheinz Fischer. See "Data change" for further contributors.

• Other Models

• Here you find 568 models, 559 with images and 90 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Marantz (Sound United LLC); Vista, CA