KEF are the ultimate paragons in loudspeaker design. Founded in 1961 by Raymond Cooke, the company is now headquartered in Maidstone, England and carries out most of its flagship R&D at the original site in Tovil. Over the decades KEF pioneered many audio industry developments, among them large scale production of driver cones from materials other than paper, the use of fast Fourier transform analysis for loudspeaker measurement and the widespread use of quality control principles.
KEF have created many landmark loudspeakers over the years among them the K1 Slimline, the BBC LS5/1A LS3/5A, the LS50 and the KEF Blade. KEF were also one of the "big three" British loudspeaker makers of the seventies and eighties alongside Celestion and Bowers & Wilkins. KEF are presently owned by the Gold Peak group in Hong Kong but most of their manufacturing and design still occur here in the UK.