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Description

KEF is a British loudspeaker manufacturer. Founded in 1961, KEF was known for manufacturing BBC-designed monitor speakers. In the 1970s, it was one of the highest regarded loudspeaker manufacturer.

History

In the 1970s, KEF was the first company to adopt computers for the testing and design of loudspeakers, leading to the "Total System Design" methodology and more sophisticated production techniques such as driver pair matching. The radical Model 105 system, released in 1977, embodied this new philosophy and was one of the most highly regarded loudspeakers of its time.
In the 1970s and 1980s, KEF, Bowers & Wilkins, and Celestion were the "big three" British loudspeaker brands. The brand has gone downmarket since.

Technology

KEF have brought to the market a number of significant technologies:
  • Driver Dcoupling: reduces cabinet coloration by mounting drivers via controlled lossy coupling (Model 105.2, 1979)
  • Coupled-Cavity Bass Loading: pairs two bass drive units and feeds their output via a single port (Model 104/2, 1984)
  • Conjugate Load Matching: a crossover optimization that presents a constant and low ohmic load to the amplifier (Model 104/2, 1984)
  • KEF Universal Bass Equaliser (KUBE): a technique to overcome the phase lag present at low frequencies (Model 107, 1986)
  • Uni-Q: placing the midrange and tweeter drivers to preserve phase integrity and match dispersion between the drivers (C-Series, 1988)

Scores

No review has been published yet.

Products

Thumbnail of product KEF Q250c Center Channel Loudspeaker

KEF Q250c Center Channel Loudspeaker

KEF Q250c is the smaller of two center channel loudspeakers in KEF's 8th-gen entry-level Q series designed for the mass market. It drops the woofer unit, lea...
Thumbnail of product KEF Q650c Center Channel Loudspeaker

KEF Q650c Center Channel Loudspeaker

KEF Q650c is the larger of two center channel loudspeakers in KEF's 8th-gen entry-level Q series designed for the mass market. It combines a single 6.5"...
Thumbnail of product KEF Q150 Bookshelf Loudspeaker

KEF Q150 Bookshelf Loudspeaker

KEF Q150 is the smaller of two bookshelf loudspeakers in KEF's 8th-gen entry-level Q series designed for the mass market. It features KEF's signature Uni-Q t...
Thumbnail of product KEF Q350 Bookshelf Loudspeaker

KEF Q350 Bookshelf Loudspeaker

KEF Q350 is the larger of two bookshelf loudspeakers in KEF's 8th-gen entry-level Q series designed for the mass market. It features KEF's signature Uni-Q tw...
Thumbnail of product KEF Q550 Floorstanding Loudspeaker

KEF Q550 Floorstanding Loudspeaker

KEF Q550 is the smallest of three floorstanding loudspeakers in KEF's 8th-gen entry-level Q series designed for the mass market. It combines a single 5.25&qu...
Thumbnail of product KEF Q750 Floorstanding Loudspeaker

KEF Q750 Floorstanding Loudspeaker

KEF Q750 is the middle of three floorstanding loudspeakers in KEF's 8th-gen entry-level Q series designed for the mass market. It combines a single 6.5"...

Articles

Thumbnail for article KEF Speaker Lineup: What Separates the REFERENCE, R Series, and Q Series Loudspeakers, and What May Be Their Applications?

KEF Speaker Lineup: What Separates the REFERENCE, R Series, and Q Series Loudspeakers, and What May Be Their Applications?

We compare the built and features of the main KEF loudspeaker lines, the REFERENCE, R, and Q Series, and discuss which applications they may best be suited for.
15 May 2020

Reviews

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