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Kef Concept Blade
Kef Concept Blade
In loudspeaker engineering as in everything else, true innovation sometimes requires rethinking a problem from first principles. So when we set out to create the Concept Blade, our acoustic research department had complete freedom to explore radical new options. No preconceptions or aesthetic restrictions, and no reliance on existing components. After three years of exhaustive testing and analysis of traditional as well as experimental approaches to loudspeaker design, they perfected a combination of technologies that generates an extraordinarily pure sound.
Concept Blade is forged from these technologies. Its exceptional acoustic integrity derives from the fact that every element of the system has been conceived to perform as a single coherent unit with all parts working in flawless harmony. The highest quality components and advanced materials have been used in perfecting the design.
While the technologies incorporated into the design are often very complex, the focus has always been on simplicity. The drivers are specifically designed to behave with zero break-up or resonance over their frequency range, and the distinctive cabinet is carefully engineered not to interfere with the purity of their output.
Single Apparent Source
High performance sound reproduction requires the drivers of a multi-way loudspeaker to generate very similar individual soundfields, especially at the crossover frequencies where the acoustic output switches from one driver to another. This is the reason why the bass drivers in Concept Blade are arranged in symmetrical pairs and are side firing. 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 array to deliver unrivalled coherence throughout the frequency range.
Uni-Q®
Open, natural-sounding vocals are assured by the latest 10th generation Uni-Q driver array. The injection moulded LCP* cone uses a combination of ribs and a 3in. (75mm) voice coil to move any break-up way above its operating range. The 1in. (25mm) titanium dome tweeter features a uniquely stiff dome profile, created using FEA** and is tube loaded to give exceptionally low resonance. The combination of these units gives a stunningly accurate, distortion-free performance, especially through the all-important crossover region where the ear is most sensitive.
Force Cancelling
With four new 10in. (250mm) low frequency drivers, bass extension is phenomenal – and notably undistorted, even when played loud. This is because KEF’s ingenious Force Cancelling technology prevents the considerable excursion of such large cones from exciting the cabinet walls and causing secondary radiation that might otherwise muddy the sound. The force produced by the drivers is so strong that the rear magnet assemblies have to be glued directly to each other in order to obtain the full benefit of this technology.
Cabinet
Uniquely, Concept Blade enclosures are made of resin impregnated woven carbon fibre over a balsa wood core – a composite used in aircraft, professional surfboards and some ultra-high performance cars for its combination of exceptional lightness and rigidity. Balsa’s low density, high strength and coarse open grain has excellent damping properties, and is used end-on to maximise stiffness; the parabolic curvature of the cabinet walls increases rigidity further still. As a result, the only sound you hear is that radiating from the drivers, and not from other parts of the speaker. Pure and simple.
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Originally Posted by Muad'Dib
