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Kef Innovation

KEF was founded on innovation and new technology. We are recognised in the history of loudspeaker development as one of the most important contributors and a great deal of our research has been published at well respected professional institutions, including the Audio Engineering Society and the Institute of Acoustics. KEF's research legacy includes contributions from some of the greatest and most respected loudspeaker designers of the last five decades. Today, KEF are the company to beat in computer analysis of loudspeakers. The software that we use to run our analyse is also used to power eighty-five percent of the world's supercomputers. We strive always to better understand the instruments that we design and manufacture.

Uni-Q®

Of the many landmark innovations KEF has pioneered, arguably the greatest of all is the Uni-Q point source driver array, with its outstanding acoustic clarity and off-axis dispersion. With over twenty years of continuous innovation and development the Uni-Q driver array achieves a level of sound quality over a broad area simply not achieved from conventional speakers.

With Uni-Q, sounds come at you so naturally that it seems as if the musicians or actors are actually there in front of you. Whether you are in the centre of the room or off to one side, recordings sound uncannily real and utterly convincing. Uni-Q achieves this because, unlike conventional speakers, the sound that is critical to the experience comes from the same point in space, and is produced in a controlled and continuous way over the whole audio range.

Ultra wide dispersion

Whether you are in the centre of the room or off to one side, recordings sound uncannily real and utterly convincing.

As a listener moves away from the main axis, the output of the treble unit falls off at approximately the same rate as that of the bass unit, thus improving the uniformity of tonal balance across the listening area, and improving the off-axis stereo imaging.

Unparalleled audio quality

Sound must come at you so naturally that it seems as if the musicians or actors are actually there in front of you. Whether you are in the centre of the room or off to one side, recordings sound uncannily real and utterly convincing. Sound that is critical to the experience comes from the same point in space, and is produced in a controlled and continuous way over the whole audio range.

KEF’s Music integrity engineTM

Bespoke Digital Signal Processing that helps the speakers deliver transparent bass with great extension, while reducing distortion. So you can fill your room with rich, full-bodied sound.

Shadow flare

Shadow Flare is an innovative method of reducing harmful cabinet diffraction for delicate high-frequencies. Shadow Flare is a carefully profiled transition surface which extends the waveguide effect of Uni-Q.

single apparent sourceTM

High-performance sound reproduction requires the drivers of a multi-way loudspeaker to generate very similar individual sound fields, especially at the crossover frequencies where the acoustic output switches from one driver to another. KEF's Single Apparent Source technology allows this ideal to be achieved over the entire frequency range.

The bass drivers are placed on both sides of the loudspeaker in force-cancelling pairs, thus forming a compact symmetrical group centered around the Uni-Q driver array. This way their combined acoustic centre can be arranged to coincide with those of the midrange and tweeter drivers. KEF's Single Apparent Source technology perfectly complements the characteristics of the Uni-Q driver array to deliver unrivalled coherence throughout the frequency range.

constrained
layer damping

This system utilises internal braces joined by a ‘lossy’ interface and is highly effective at dissipating unwanted vibrations that would otherwise artificially change the sound and music.

constrained
layer damping

This system utilises internal braces joined by a ‘lossy’ interface and is highly effective at dissipating unwanted vibrations that would otherwise artificially change the sound and music.

Flexible Ports

When it comes to generating deep, articulate bass, port design is crucial. Using computational fluid dynamics, the flare and profile of each port is calculated to delay the onset of turbulence, while the flexible port walls prevent longitudinal resonances from colouring the midrange.

Low profile driver

KEF's low profile driver technology has been developed to meet the demand for ultra-shallow loudspeakers that can physically match the new generation of LED and OLED televisions and displays. The key to achieving this is the ability to reduce the bass driver depth from a typical 70mm down to less than 30mm, without sacrificing acoustic performance.

IBX

This Intelligent Bass Extension algorithm creates an extended depth that unlocks the full potential of the custom driver. Giving you unparalleled precision and ultimate synchronicity between amplifier, driver and sealed cabinet.

Selecta-mount

Obviously not all loudspeakers can be placed wherever the user wants due to space constraints or the inflexibility of interior design schemes. Typical freestanding loudspeakers can suffer from unwanted 'boundary effects' when wall-mounted, which leads to 'bass coloration' and an unnatural midrange response. Conversely, loudspeakers designed specifically for wall mounting can sound 'thin' and 'lightweight' when positioned in free space.

KEF's innovative Selecta-mount system uses a clever internal connecting system to automatically adjust the crossover depending on how the loudspeaker is mounted, gives you the freedom to place the loudspeakers wherever you want and still enjoy great sound.

Obtaining good bass performance from small speaker boxes has always been the 'holy grail' of loudspeaker design. Typically a small box will have less bass performance than a larger one. However, after years of research KEF has overcome this problem with the development of Acoustic Compliance Enhancement (ACE), where activated charcoal, just like in a water filter, is placed inside the loudspeaker cabinet.

Tiny holes in the porous ACE material act like the small air sacks in a lung by absorbing and giving out air molecules as the drive unit moves in and out. This helps the bass driver 'breathe' more easily allowing improved bass performance. In fact, a speaker using ACE technology can have the same bass performance as a conventional speaker of twice the size.