KEF IQ30 Manuel utilisateur

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As every hi-fi enthusiast knows, KEF is one of the industry’s great innovators. Ever since the early days of hi-fi,

our approach has been driven by a passionate belief in the power of new materials, new technologies and new design

thinking to heighten the enjoyment of recorded sound.

Of the many landmark innovations KEF has pioneered, arguably the greatest of all is the Uni-Q® point source array,

with its outstanding acoustic clarity and off-axis dispersion. The first complete product range to showcase the Uni-Q in

every model was the Q Series and now, after almost 20 years of continuous development, the latest iteration of this

award-winning line raises the bar even higher, both subjectively and objectively.

The kinship with KEF’s iconic Reference Series is obvious, from the distinctive curved cabinets to the sheer quality of

construction. But what’s really clever lies inside: the latest Uni-Q array with the addition of the ingenious ‘tangerine’

waveguide to KEF’s high performance tweeter, new dual composite bass cones, remapped crossovers and new internal

damping technologies markedly improves the acoustic response right across the frequency range.

Fashions have come and gone since the original Q Series was launched, but the objective remains the same: to fill the

room with the purest possible sound. Thanks to intelligent engineering and enlightened design, the new Q Series is

even more eloquent in this respect than its illustrious predecessors.

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intelligent innovation

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a distinguished

pedigree

KEF has always been the purist’s brand.

Founder, Raymond Cooke, was an ex-BBC engineer whose

innovative first designs earned the respect of broadcast

professionals all over the world for their accuracy and

neutral balance.

In 1961, he founded KEF to pursue a simple but elusive

ideal: to reproduce recordings so perfectly that they sound

indistinguishable from live performance. This same

perfectionism is what drives today’s engineers at KEF’s

research laboratories in the UK.

In any technology-driven organisation, perfectionism

means constant innovation. From computer modelling

and the use of aerospace technologies to the development

of new cone materials, KEF has done more than any other

manufacturer to advance the state of the art. That’s why

the latest incarnation of the aptly named Reference Series

is as much of a benchmark today as the original was 30

years ago. Just as the groundbreaking new Muon concept

sets unprecedented standards of audio fidelity. Created in

collaboration with Ross Lovegrove, these aluminium

sculptures exemplify KEF’s ambition to achieve perfect

acoustic transparency through radical design thinking,

obsessive attention to detail and engineering excellence.

This new Q Series is the latest expression of the KEF

ethos, and provides a source of lasting pleasure and pride

for the makers and owners alike.

Founder, Raymond Cooke, MBE.

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The new Q Series features more advanced audio

technology than a few words can describe.

There’s the unrivalled detailing and off-axis performance

of KEF’s latest Uni-Q point source array, which disperses

spatially accurate sound imagery far more broadly and

evenly than a conventional speaker. The new ‘tangerine’

waveguide over the aluminium dome of KEF’s disarmingly

natural-sounding 19mm (0.75in.) tweeter, enhances high

frequency response throughout the room and helps to

deliver spine-tingling realism. With rigorously engineered

magnet systems and titanium-coated cones, the crucial

midrange combines delicacy and assertiveness in

equal measure. Dual composite bass cones are driven by

ultra-low distortion motors incorporating Faraday rings to

iron out harmonic distortion and deliver sumptuously

extended bass. Remapped crossovers (mounted directly

to shrouded bi-wire terminals for the crispest possible

signal transmission) ensure inaudibly smooth transitions.

The distinctive curved enclosures are designed to maximise

cabinet stiffness and minimise internal reflections.

The floorstanders also feature a new ‘labyrinth’ internal

damping system to eliminate colouration effects from

vertical standing waves.

Meticulously engineered, all these different KEF

technologies combine to deliver full bandwidth response

that’s exceptionally articulate, perfectly balanced and

almost completely transparent. Wherever you sit,

what you hear is what the artist intended.

high order

technology

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The iQ90 exemplifies everything that makes the new

Q Series great. Like all models in the range, it’s a bass

reflex design based on pairing KEF’s latest and most

sophisticated Uni-Q array with powerful new generation

bass drivers. All in an elegantly curved cabinet that’s

designed to maximise cabinet stiffness and minimise

internal reflections.

Immediately distinguishable by the soft titanium sheen of

the midrange cone and the ‘tangerine’ waveguide around

the tweeter dome, the 165mm (6.5in.) Uni-Q driver

reproduces the nuances of the human voice with

subtlety and real depth. Midrange response is fluid,

perfectly time-aligned with the high frequencies and

evenly delivered over an exceptionally wide area. As you

would expect from low distortion motors driving dual

composite cones, the two 165mm (6.5in.) low frequency

drivers of the iQ90 deliver lavish bass, consummately

controlled;

and with KEF’s ‘labyrinth’ damping system,

none of the accompanying distortion that so often impairs

tall speakers.

As front speakers for high-end home theatre or as a

stereo pair, the iQ90 has gratifyingly precise 3D imaging,

breathtaking dynamics and real depth to the performance.

As with the other Q Series floorstanders, a discreet plinth

is provided for even greater stability; and whichever

model you opt for, you can choose between Dark Apple,

American Walnut and classic Black Ash finishes, or the

superb new hand-matched real wood veneers in Light Oak

and Walnut.

iQ90 floorstander

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With all the benefits of the iQ90 in a slimmer enclosure,

iQ70 is an assertive full bandwidth two and a half-way

bass reflex floorstander that reproduces music and movie

soundtracks with equal clarity and flair. With the 165mm

(6.5in.) new Uni-Q point source array and 19mm (0.75in.)

tweeter partnered by a high performance low frequency

driver of the same size, it radiates a faultlessly detailed

3D acoustic image evenly throughout the room. With twin

shrouded terminals for bi-wiring or bi-amplification and

impressive power handling, faultless integration,

breathtaking vocals and heavyweight bass; the iQ70 has

the looks, engineering integrity and acoustic performance

to deliver uncompromised listening pleasure with

whatever media you choose.

iQ70 floorstander

A more compact incarnation of the same high-end

technologies and design principles, iQ50 shares the

exceptionally wide, even dispersion that characterises the

range, together with KEF’s legendary build quality.

The 19mm (0.75in.) tweeter, identical to the larger

models, is built into the 130mm (5.25in.) version of KEF’s

latest Uni-Q high frequency/midrange array. Coupled with

a new lightweight dual composite long-throw bass driver

of the same size in a two and a half-way configuration the

new iQ50 is an accomplished performer as satellites in a

5.1 package or as a dedicated two channel system.

With the inherent sweetness that makes good music sound

great the iQ50 represents outstanding value for those who

take sound seriously.

iQ50 floorstander

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If you prefer smaller speakers, the good news is that

all the essential iQ technology is available in more

compact enclosures.

As you can tell from the distinctive ‘tangerine’ waveguide

around the dome of KEF’s acclaimed 19mm (0.75in.)

neodymium tweeter and the metallic glint of the

surrounding midrange/low frequency cone, they’re all

based on the stunning new Uni-Q array. In the case of the

iQ30, the 165mm (6.5in.) version.

The result is an incredibly versatile music or home

entertainment speaker with a seductive lightness of touch.

With the same curved cabinet design minimising internal

reflections, it has a lyricism and depth not normally

associated with bookshelf speakers. It delivers an excellent

dynamic expression with a bass response that is deep and

expansive. Dispersion is characteristically consistent and

broad, so you enjoy the same extraordinary illusion of

presence wherever you sit. It’s like re-experiencing your

favourite tracks or movies for the very first time.

As easy to position as they are to drive, the new iQ

bookshelf models are magnetically shielded like the rest

of the range. They come in the same choice of finishes as

the floorstanders: Black Ash, Dark Apple and American

Walnut, with the option of real wood veneers in Light Oak

and Walnut.

iQ30 bookshelf

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