KEF Technology

Single Apparent Source Technology

Single source. Coherent sound.

Single Apparent Source technology aims to achieve the acoustic ideal of a point source, where low, mid and high frequencies radiate from one point. Perfectly calibrated drivers that cover the entire bandwidth of the loudspeaker are configured so that all frequencies appear to radiate from one single point. The result is noticeably more precise imaging and highly accurate sound across a wider area.

Uniquely KEF. Uniquely precise.

Single Apparent Source is a unique technology that is only possible with the iconic Uni-Q® driver array, the building block of KEF's signature sound. To achieve the acoustic ideal of a point source, four low-frequency drivers in symmetrically opposing pairs are tightly packed around a two-way Uni-Q® driver where the mid-frequency and high-frequency share the same acoustic centre.

Real. Immersive. Accurate.

In a conventional loudspeaker design, drivers producing different frequencies radiate from separate points causing interference as the drivers interact. Single Apparent Source eliminates this interference, so the sound is incredibly clear, accurate and sounds more real and immersive.


Originally designed as a concept speaker, Blade is the world’s first single apparent source loudspeaker that extended the boundaries of what high end audio can achieve. It is what makes the Blade incredibly coherent across the frequency range, with noticeably more precise imaging than is possible from any conventional speaker.

LS60 Wireless

LS60 Wireless is KEF’s first wireless tower stereo system. A heady combination of Blade’s Single Apparent Source design, Uni-Q® with MAT and other signature KEF technologies, the iconic slim design is the work of Michael Young and KEF product design team.

More KEF Technology


KEF’s many pioneering innovations are all geared towards delivering breath-takingly natural sound; sound that lets you enjoy music as it was meant to be heard. Of all these pioneering developments, it is the Uni-Q® driver array that sits at the heart of almost all our speakers.


KEF’s innovative, patent-pending Uni-Core™ technology redefines the physical space that high-performance speakers and subwoofers require to deliver deep and accurate bass. Through exceptional engineering and creativity, KEF’s engineers have revolutionised the traditional force cancelling arrangement with a Uni-Core™ design that delivers deeper bass from ultra-compact cabinets.

Metamaterial Absorption Technology

A truly revolutionary tool in the KEF acoustic armoury, Metamaterial Absorption Technology (MAT) is a highly complex maze-like structure that absorbs 99% of the unwanted sound from the rear of the driver, eliminating the resulting distortion and providing purer, more natural sound.
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