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History of the 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  56–81 Quad ESL 57 Electrostatic-Loudspeaker   The Quad ESL 57 was manufactured for a long period because it was not easy surpassed for r... 
GB  67–69 Quad FM Tuner II (2) 6BH6  FM Tuner with Foster-Seeley discriminator. Built-in Stereo-Decoder. 
GB  65 AM 3 Tuner [European] EF89  AM Tuner, Overseas Version with different RF coverage and bandwith. 
GB  60–67 Quad Tuner AM 2 [European Model] EF89  AM Tuner for use in combination with a Quad Amp., Overseas version with different RF cover... 
GB  53 Quad II (2) EF86  Monaural power amplifier. Also power supply for the accompanying Quad QC II control unit ... 
GB  56 QUAD Control Unit 22 EF86  Preamplifier with extraordinary phono equalisation: 25, 50, 75, 318, 450 and 3180 µsec dif... 
GB  80 44   Vorverstärker zur Endstufe Quad 405. 
GB  75 405   Stereo- Endstufe mit (seinerzeit) neuer Schaltungstechnik (Current Dumping Amplifier). 
GB  56 AM1   AM-Tuner for use with a Quad-Amplifier. 
GB  59–68 Quad FM Tuner FM1 6BH6  Matching with Quad 22 System.FM Tuner with Foster-Seeley discriminator. Later versions wit... 
GB  65 Quad Multiplex Decoder OC44  Stereo Decoder, passend zum Quad FM Tuner. 
GB  53 Quad Control Unit QC II (2) EF86  Preamplifier, mono. The unit takes its power from the main amplifier type Quad II. 

[rmxhdet-en]

Further details for this manufacturer by the members (rmfiorg):

tbn_gb_acoustical_logo.jpg
tbn_gb_acoustical_quad4_1951.png

  
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