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History of the radio manufacturer  

Acoustical Manufacturing Co. Ltd, The; Huntingdon

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Name: Acoustical Manufacturing Co. Ltd, The; Huntingdon    (GB )    
Brand:
Quad
 
Abbreviation: acoustical  
Products: Model types  
Summary: The Acoustical Manufacturing Co. Ltd, St. Peter Road, Huntingdon, England. Better known with their brand name "Quad", and still active.

 
Founded: 1936
History:
After working for EMI and GEC, audio master Peter James Walker founded in 1936 the 'Acoustical manufacturing company'. The company produced 'Public Address' systems and compact amplifiers (relatively speaking). In 1949, the company produced the 'Corner Ribbon Loudspeaker, producing higher frequencies than had ever previously been achieved. In the same year, the QA12/P was launched and the brand 'QUAD' was born from an acronym 'Quality Unit Amplified Domestic'.
Milestone in the history was the first full-range electrostatic loudspeaker 'Quad ESL', introduced in 1957.
 

This manufacturer was suggested by Georg Richter.


Some models:
Country Year Name 1st Tube Notes
GB  50 Quad I (1) EF37A  QUAD (Quality Unit Amplifier Domestic) mono power amplifier, with power supply for... 
GB  82 Pre-amplifier 34   Stereo audio pre-amplifier designed to work with the 405 or 306 power amplifier. 
GB  82–95 QuadTuner FM4    
GB  71 Quad Tuner FM 3   Quad FM 3 Tuner, stereo, matching pre-amplifier is model Quad 33.Aerial connectors for 75 ... 
GB  49 Quality Amplifier QA 12P EF37  Vorläufer der QUAD Verstärker; QA12P steht für: Quality Amplifier 12 watts with pre-amplif... 
GB  67–72 Quad 33   Stereo Control Unit with configurable inputs; pairs with power amp Quad 303. 
GB  69–72 Quad 303   Power amp, stereo. 
GB  53 Quad Control Unit QC II (2) EF86  Preamplifier, mono. The unit takes its power from the main amplifier type Quad II. 
GB  65 Quad Multiplex Decoder OC44  Stereo Decoder, passend zum Quad FM Tuner. 
GB  59–68 Quad FM Tuner FM1 6BH6  Matching with Quad 22 System.FM Tuner with Foster-Seeley discriminator. Later versions wit... 
GB  56 AM1   AM-Tuner for use with a Quad-Amplifier. 
GB  75 405   Stereo- Endstufe mit (seinerzeit) neuer Schaltungstechnik (Current Dumping Amplifier). 

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