Manual KEF Reference 203-2 (page 15 of 19) (English)

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KEF was founded in 1961 by an electrical

engineer named Raymond Cooke in a Nissen

Hut on the premises of a metalworking

operation called Kent Engineering & Foundry

(hence KEF), on the banks of the River Medway,

near Maidstone in Kent.

From the beginning KEF was destined to become

a company with a flair for the unusual and

controversial in terms of loudspeaker

engineering, design, and use of materials.

Within a year, KEF, under Cooke’s outstanding

vision, was planning loudspeakers with bass units

using foil-stiffened, vacuum-formed, expanded

polystyrene diaphragms and a Melinex or Mylar

tweeter. This idea was manifested in the K1,

an immediate success, followed by the bookshelf

model, Celeste, a loudspeaker with an even

more significant commercial success and one

that helped secure the early financial stability of

the new company.

Re-establishing a previous relationship with the

BBC in 1966, Cooke was interested in adopting

another material, Neoprene (an artificial rubber)

to help maintain sound quality in the mid-band by

using it as the surround to the loudspeaker

diaphragm, while using new materials for the

diaphragm itself. Cooke was always looking for

new materials and settled on Bextrene as a

solution, as its lightweight plastic sheet-like

properties were flexible enough for shaping and

the material remained stable under varying

temperature and moisture conditions and was

smooth and consistent over a wide bandwidth.

As a result, in 1967, two new drive units, the 5in.

B110 and 8in. B200 appeared which, with their

countless applications, found use in some 3

million systems from KEF and many other

loudspeaker brands throughout the world.

A new, smaller tweeter also arrived, the T27,

which led to the most famous BBC/KEF

collaboration, the LS3/5A, of which some

100,000 units were sold world-wide.

During the 1960’s KEF flourished.

Loudspeakers such as the Concord,

Concerto and Cresta and then, in 1969,

the Chorale began to shape the company’s

growing reputation as ‘The Loudspeaker

Engineers’, a fact justly recognized in 1970 when

KEF received the first of two Queen’s Awards

for Export Achievement.

KEF Heritage

Photograph : Martyn Goddard. Courtesy Sunday Telegraph Colour Supplement.

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KEF Reference 203-2 Manual

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