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3-Way Walnut Q Series Floorstanding Loudspeaker

Let's say that you're not willing to mortgage your house or forgo sending the kiddies to college in order to buy a speaker package that'll rock the socks off the entire block. It's not that you lack commitment or desire, but that you know your priorities. KEF has designed a speaker that will allow you to have your cake and eat it too -- the iQ5 floorstanding loudspeaker. With Kef's proprietary Uni-Q Array -- featuring a 0.75" aluminum-dome, high-frequency driver at the acoustic center of a 5.25" titanium-coated, midrange cone -- as well as a 5.25" long-throw, low-frequency driver, the iQ5 will leave no room unrocked, even if that room happens to be in your next door neighbor's house.

A Full-Range Speaker Without Having To Empty Your Wallet

A compact, full-range floorstander, the Q Series iQ5 is a true three-way speaker. With KEF's new 5.25" long-throw LF driver delivering superbly defined bass, the midrange driver of the 5.25" Uni-Q point source array is dedicated to reproducing midrange frequencies with even greater clarity. High order crossovers ensure seamless transitions between each driver, and with Uni-Q's remarkable off-axis dispersion characteristics, you get a speaker that's as easy to place as it is rewarding to hear -- especially for enjoying the richness and complexity of modern digital formats. Ideal for use with iQ1 and iQ2c in a home cinema system, it's a superbly assertive performer for the modest size of its slender cabinet and outstanding value if you aspire to genuine audiophile standards of sound reproduction.

Acoustic Intelligence

Acoustic intelligence -- that?s the best way to describe what KEF engineers have applied to create their newest line of iQ floorstanding speakers. From the second you spot the soft sheen of titanium on the Uni-Q Array driver cones, you know you?re in for something special. And you won?t be disappointed. Restless, despite being one of the best, KEF has made improvements to every aspect of its trademark Uni-Q technology. With new cone materials and surrounds. Redesigned magnet structures. New, state-of-the-art voice coils. Higher specification components. More rigid chassis and cabinets. The result of all these innovations is plain to hear. Power handling and sensitivity are better than ever. iQ plays loud and true, with even clearer vocals than its illustrious predecessor. Even gutsier and more tightly controlled bass. And, of course, the impeccable extended bandwidth response you need to get the most out of the latest digital audio and home theatre formats. As every model in the range is voiced for a perfect tonal match, the 3-D soundscape is so seamlessly integrated that everyone in the room gets the full benefit, wherever they sit. Breathtaking is the only word to describe it.

Uni-Q Array Explained

You don?t have to be a genius to understand why iQ Series 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, LF and HF 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 colourations 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 Uni-Q array in the Q Series incorporates a sophisticated new tweeter with an aluminium dome that increases the break-up resonance to 34kHz (as compared to the 25kHz threshold of a typical standard dome). The MF voice coil is of copper-coated aluminium ribbon, edge-wound over a polyimide former to increase sensitivity by maximising 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. The tall profile cone surrounds are of butyl rubber to allow greater excursion, and therefore higher output. Faraday rings are incorporated into the ultra-low distortion motor, further reducing harmonic distortion by as much as 20dB. And audiophile-grade crossovers are connected to the shrouded bi-wirable terminals to ensure the cleanest possible signal transmission. 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 iQ Series is all about.

Functional, Yet 0h-So-Pretty!

With so much high-end technology inside, it?s not surprising that the Q?s distinctive styling bears a family resemblance to the latest Reference Series, with the Uni-Q ?pod? faired in to elliptical-section cabinets. Hard to believe as lovely as these speakers are, but the design was driven by functional considerations rather than aesthetics. Curved enclosures minimize distortion from the internal acoustic reflections generated by parallel straight surfaces -- but because they?re complicated to make, the benefit is usually reserved for the most expensive audiophile-quality speakers. iQ Series cabinets are thermally formed in ?heavy? MDF, whose density makes it acoustically inert to reduce unwanted coloration of the sound image. Using laminated construction techniques, with inner and outer layers bonded to a segmented core in a giant press, the precisely radiused panels are exceptionally rigid, with the Uni-Q arrays faired in to the cabinet. Massive internal bracing tailors the volume of each enclosure to the exact parameters of its drive unit and minimises any residual panel resonance. All models have two pairs of fully shrouded terminals for bi-wiring or bi-amplification, and are magnetically shielded to prevent interference with other electronics. As you?d expect, the standard of finish is exemplary, with a choice of Black Ash, Dark Apple, Maple, and Walnut.

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