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Uni-Q Array Explained

You don't have to be a genius to understand why the latest KEF speakers sound so good. After all, they incorporate the Uni-Q technology originally designed for one of the world's finest speaker ranges, KEF's legendary Reference Series. The Uni-Q concept is based on using aerospace materials to make the tweeter small enough to place at the acoustic center of the bass/midrange cone. With both drive units on exactly the same axis and sharing the same waveguide, they behave as a single point source that projects a more natural sound image over a much larger area than the usual tiny 'sweet spot.' This is because the Uni-Q configuration eliminates the inherent problems of having the separate midrange and high frequency drive units of a conventional speaker. As loudspeaker radiation varies according to frequency, low frequency and high frequency drivers have intrinsically different radiation patterns whose directivity - known as 'Q' - changes at the crossover frequency. Interference (or 'lobing') between the two units causes a dip in power response around this frequency, with a peak above it due to their differences in directivity. These factors introduce colorations that muddy the sound image. You get no such problems with Uni-Q. Being coincident and perfectly time-aligned, the directivity of both LF and HF units is controlled by the profile of the midrange cone, with no possible path or phase differences between the two, and no 'lobing' interference at the crossover. The 'Q' is unified, in other words - hence the name. So instead of narrowing towards the crossover and then widening again as is the case with separate drive units, the Uni-Q radiation pattern remains stable. Power response is uniform, with smoother variations on and off-axis. The acoustic image is better balanced and more natural sounding across both direct and reverberant fields. Multi-channel imaging is noticeably clearer and more accurate. The MF voice coil is of copper-coated aluminium ribbon, edge-wound over a polyimide former to increase sensitivity by maximizing the amount of copper in the magnet gap. The chassis are of precision-cast aluminium for greater rigidity, with a vented design to improve power handling. Faraday rings are incorporated into the ultra-low distortion motor, further reducing harmonic distortion by as much as 20dB. With refinements like these, no wonder the sound is so open and natural. No wonder the action on screen suddenly becomes more compelling. No wonder you get so utterly immersed in the listening experience. It's what the KEF experience is all about.

KEF WARRANTY INFORMATION

 All KEF products are precision engineered and should give years of enjoyment. However, in the unlikely event service should be required, passive KEF products are warranted against FAULTY MATERIAL AND/OR WORKMANSHIP for a period of 5 (FIVE) years from the date of original purchase. Custom Installation (Ci) models are warranted for a period of 2 (TWO) years for both passive and motorized models.

Active Electronics are guaranteed against FAULTY MATERIAL AND/OR WORKMANSHIP for a period of 1 (ONE) year from the date of original purchase. Note: Subwoofers contain passive elements and active electronic elements, active elements are warranted for a period of 1 year and the passive components are warranted for a period of 5 years on such models.

All warranties are subject to the following restrictions:

• This warranty is only valid in the country of purchase and applies to the first purchaser only.
• That the equipment has not been disassembled, modified or tampered with by any person other than an expressly authorized representative of GP Acoustics (US) Limited.
• That the equipment has not been abused or operated in conjunction with unsuitable, inappropriate or faulty apparatus.
• That the equipment has not suffered mechanical damage or damage in transit.
• That the Serial Number label(s) have not been defaced or removed.