Thorn Studio 502 Ambiophonic

MRI Thorn (Brand) Mowat Radio Industries Ltd; Thorn Radio Industries Ltd; Mangere Bridge Auckland

Data
Forum
Pictures
Collections

  • Year
  • 1975
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 360526

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

 Technical Specifications

  • Number of Transistors
  • 26
  • Semiconductors
  • Main principle
  • Superheterodyne (common); ZF/IF 455 kHz; 6 AF stage(s)
  • Wave bands
  • Broadcast only (MW).
  • Details
  • Changer (Record changer)
  • Power type and voltage
  • Alternating Current supply (AC) / 50Hz, 230 Volt
  • Loudspeaker
  • 2 Loudspeakers
  • Power out
  • 30 W (max.)
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Thorn Studio 502 Ambiophonic - MRI Thorn Brand Mowat Radio
  • Shape
  • Console with any shape - in general
  • Notes

  • Thorn Studio 502 Ambiophonic System 15 + 15 Watt

    Garrard 6300 record changer with pole motor. Ceramic Garrard type KS41C cartridge with diamond stylus and integrated radio tuner. 

    Supplied complete with a pair of matching 71AS speaker enclosures. Technical specifiçations as Studio 501. Record dividers are easily removed to accommodate the Thorn 3601 Dolby Stereo. Cassette Deck, (The Word 'Dolby" Is a trademark of Dolby Laboratories, Inc.) $499.00 

    Ambiophonic sound system (Used with optional rear speakers).

    The rear speakers are connected to the front speakers in a bridge configuration. This means that the rear speakers reproduce any phase shift applied to the front speakers, but they do not reproduce any other audio signal.

    This configuration is used to create the illusion of sound coming from the rear speakers. By applying a phase shift to the audio signal sent to the rear speakers, the system can create a sense of sound directionality. This is because the human brain interprets the phase difference between the audio signals from the left and right ears to determine the direction of a sound source.

    Specifications:

    • Power Output: 15 watts. per channel.
    •  Frequency Response: 30 Hz— 20 kHz +1 dB using tape input.
    •  Power Bandwidth: 30Hz — 20 kHz unclipped at — 2 dB points
    •  Distortion: Less than 0.1% up to 1 dB below maximum power output.
    •  Magnetic pickup
    •  Tape input
    •  Auxiliary input
    •  Power Consumption: 75 watts from nominal 230V (215-245V) AC 50 Hz. Supply.
    •  Semiconductor Complement: 26 Transistors, 10 Diodes
    •  Tone Controls: (Reference 0 dB at 1 kHz) Bass = 12 dB at 40 Hz Treble + 12 dB at 10 kHz
    •  Contour: (at 30 dB below full volume setting). + 9 dB at 40 Hz, + 7 dB at 10 kHz
    •  Low Filter:— 20 dB at 20 Hz
    •  High Filter:— 10 dB at 10 kHz
    •  Crosstalk: Better than 40 dB at 1 kHz for any input.

    See also Thorn Studio 501, Studio 503, and Studio 504. 

  • Price in first year of sale
  • 499.00 NZ $
  • Mentioned in
  • -- Original prospect or advert (Press 6 September 1975 Page 22)
  • Literature/Schematics (1)
  • -- Original prospect or advert (Press 14 July 1976 Page 17)
  • Literature/Schematics (2)
  • - - Manufacturers Literature ((Thorn Studio 500 & 600 Series Service Manual))
  • Author
  • Model page created by Brian Stevens. See "Data change" for further contributors.

 Collections | Museums | Literature

 Forum