Kef Home Theatre Catalog
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KEF and the multi award winning KHT story 02 Uni Q ®Technology 03 ACE Technology 04 1000 Series 05 2000 Series 07 3000 Series 09 5000 Series 11 6000 Series 13 9000 Series 15 fivetwoseries 17 Wireless 19 Subwoofers 21 Specifications 23 Contents www kef com The more sophisticated that digital audio formats become, the better your speakers need to be. Which to choose, though? Manufacturers come and go. Design trends appear, then fade away. But with KEF, youre dealing with people whove been consistently innovating since 1961. The KEF Home Theatre (KHT) Series is a good example. By bringing audiophile quality sound to affordable home entertainment, its been breaking new ground ever since it was first introduced. As its many awards and 5 star ratings prove, the original outperformed every conventional system in its class. The latest KHT systems extend this advantage even further, whatever your budget. With the introduction of radically innovative concepts like Acoustic Compliance Enhancement (ACE), the latest refinements of KEFs trademark Uni Q technology and a new generation of powered subwoofers, theres a formidable line up of options to choose from. KEF and the multi award-winning KHT story Theyre all designed to reproduce ever y last detail encoded in the latest home entertainment formats, and having identical drivers for the satellite and centre speakers of each system guarantees a perfect tonal match. Naturally, theyre all magnetically shielded to avoid interference with your other equipment. Although each has its own distinctive look, every system is engineered with acoustically inert cast aluminium enclosures and high end components including metal dome tweeters to create an accurate and compellingly real 3D soundscape and with the ultra wide dispersion characteristics of KEFs Uni Q point source array, its enjoyed with equal pleasure by everyone in the room. 02
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Based on those developed for the legendary Reference Series, the Uni Q arrays in the KHT range are the most sophisticated yet, with metal dome HF drivers that reproduce the human voice with breathtaking accuracy. In purely practical terms, the larger sound image gives you far greater flexibility in placing your speakers where they look best. For home theatre, it means that you experience even the subtlest 3D soundtrack effects with the same clarity and realism wherever you sit. Uni-Q Excellent dispersion characteristics common with a l Uni Q based products showing wider listening area. Conventional loudspeaker dispersion showing narrow sweet spot. Technology KEFs patented Uni Q driver configuration disperses the sound image over a much larger area than a conventional speaker, instead of being restricted to a small sweet spot. This outstanding off axis response is made possible by using aerospace materials to engineer a high performance tweeter thats small enough to mount in the exact acoustic centre of the bass/midrange cone so that both act as a single point source an ideal that, so far, only KEF has achieved. 03 ACE Effect of ACE on a 10 litre closed box loudspeaker The holy grail of loudspeaker design has always been to generate big bass from small boxes. The trouble is, the laws of physics make this almost impossible to achieve, as bass extension relates directly to efficiency and cabinet size. Continuing a 40 year tradition of genuine design innovation, KEF engineers have now developed a way of overcoming this apparently insoluble limitation. Its called Acoustic Compliance Enhancement (ACE), and it works like this. In conventional speakers, cone motion is restricted by the acoustic pressure in the enclosure as the air is alternately compressed and expanded by the cone moving in and out. The smaller the enclosure, the greater the pressure that acts on the cone. By dramatically reducing this pressure, ACE allows the cone to move as freely as it would in a much larger cabinet, generating bass extension out of all proportion to its actual size. This is achieved by introducing granules of activated carbon into the enclosure a material containing millions of pores ranging in size from visible fissures to holes a few molecules across. One of its characteristics is a capacity for physicaladsorption, the gravity like molecular force in which a substance (usually a gas) accumulates in a thin film on the surface of a solid. In the ACE loudspeaker when the cone moves inwards the air pressure increases, triggering adsorption of air molecules from the free air into the carbon.This removal of air molecules from the free air causes the internal pressure to decrease. When the cone moves outwards the opposite happens and the carbon gives out air molecules. The ACE material is constantly acting to reduce the pressure variations in the enclosure in a controlled and linear fashion. Its an innovation that makes an amazing difference for the listener. By enhancing compliance by anything from 150% to 300%, ACE enabled loudspeakers perform like units up to three times their size. In trials of identical Uni Q arrays fitted to an ACE enclosure 40% smaller than the test cabinet, not only did the listeners agree that bass was undiminished they unanimously preferred the bass attack of the ACE version. And thats the acid test of any radical breakthrough in audio design: subjectively as well as objectively, ACE enriches the listening experience. 04