KEF XQ10 Manuel utilisateur

INNOVATORS IN SOUND

X Q S E R I E S

Sound – especially music – can trigger some of the most profound

emotional responses it’s possible to experience.What makes the

new XQ Series from KEF so special is the ability to reproduce

original sound with such depth and clarity that it makes the very

essence of that experience come alive.Whether it’s exhilaration,

awe or mellow relaxation, you feel more.

The ‘how?’ lies in some of the most advanced audio technologies

available anywhere. In the XQ range, KEF’s patented Uni-Q®

‘point source’ driver array has been further enhanced by the

addition of an ingenious ‘tangerine’ waveguide that produces a

sweeter sound and disperses it even more widely throughout

the room. Every element of the design has been meticulously

engineered, from the crossover conﬁguration derived from the

legendary Reference Series to cabinets contoured to eliminate

box colourations. KEF’s renowned build quality and attention to

detail is evident throughout, with all models magnetically shielded

and perfectly timbre-matched.

The new range now gives you more choice than its award-

winning predecessor, with two majestic ﬂoorstanding models,

two bookshelf speakers and a truly formidable centre channel.

The distinctive and acoustically efﬁcient cabinet shape remains,

but there’s now a choice of high gloss real wood veneers and

a sleek Piano Black.To ﬁnd out more about each model, turn to

the page number shown…

XQ50c

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XQ40

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XQ30

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XQ20

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XQ10

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INNOVATORS IN SOUND

THE XQ Range

Flanked by a pair of 165mm (6.5in.) ultra-low distortion LF drivers

(independently loaded to neutralise distortion from internal

standing waves) for exceptionally ﬂuid bass response, the individually

pair-matched Uni-Q midrange/HF array ﬂoods even the largest

space with an intricately detailed sound image, irrespective of

where you happen to be sitting.

Dynamics are crisp and assured, with seamless transitions born

from crossover technology based on that of the KEF

Reference Series and perfectly matched to the advanced

19mm (0.75in.) tweeter with the new ‘tangerine’ waveguide.

Together these capture nuances of the human voice that

you usually only ever hear live. What you experience is a big,

expansive sound tempered by a remarkable delicacy. Flawlessly

natural imagery, especially with digital formats. Full-bodied

emotion under perfect control. It’s a beguiling combination.

THE XQ40

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FLOORSTANDING EXCELLENCE

XQ40

Respect is what the XQ40 commands.

Not just because it sounds as assertive

as it looks, but because of the uncanny

illusion of presence it creates. With

music or drama, it is as if the original

source of the sound were right there

in the room.

Birdseye Maple Khaya MahoganyPiano Black

Full bandwidth three-way floorstander

Unrivalled off-axis performance from KEF’s latest

165mm (6.5in.) Uni-Q midrange/HF array with

new ‘tangerine’ waveguide

Two 165mm (6.5in.) ultra-low distortion bass

drivers in dedicated enclosures

Reference Series inspired audiophile grade tiered

crossover to eliminate coupling effects

Magnetically shielded, with a choice of three superb

high gloss ﬁnishes

The pairing of an ultra-low distortion bass driver with the latest

incarnation of KEF’s signature Uni-Q ‘point source’ array for the

middle and upper frequencies, disperses a compellingly rich three-

dimensional sound ﬁeld evenly throughout the listening area.

Crossover technology developed from the Reference Series

assures excellent power handling, along with exceptionally

ﬂuid transitions.

The clean organic curves of the cabinet sides are calculated

to maximise rigidity while minimising unwanted internal

resonance. The result is a refreshingly open, natural response

that reproduces the complexities of the recording with equal

authority whether you’re enjoying instrumentals, vocals or movie

effects. With three striking contemporary ﬁnishes to choose

from (Birdseye Maple, Khaya Mahogany and Piano Black),

the aesthetics are as distinguished as the sound. Lucid, lyrical

and deeply rewarding.

THE XQ30

An elegant three-way floorstander of

uncompromised acoustic integrity

Wide dispersion 130mm (5.25in.) Uni-Q

midrange/HF array incorporating high

performance elliptical dome tweeter and new

‘tangerine’ waveguide

130mm (5.25in.) bass driver with KEF’s ultra-low

distortion motor system

Reference Series inspired audiophile grade tiered

crossover to eliminate coupling effects

Magnetically shielded, with a choice of three superb

high gloss ﬁnishes

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Tall, slender and undeniably elegant, the

XQ30 is the perfect synergy between

performance and size.

SLIMLINE FLOORSTANDER

XQ30

Birdseye Maple Khaya MahoganyPiano Black

With KEF’s sophisticated elliptical dome tweeter mounted in

the acoustic centre of the bass/midrange cone, the latest Uni-Q

array with ‘tangerine’ waveguide disperses an uncannily accurate

sound image throughout the room with startling clarity, so you

have far greater freedom of positioning.

Bass extension is as generous as it is well deﬁned, thanks to an

ultra-low-distortion bass/midrange driver in a massively braced

reﬂex-ported enclosure. Engineering excellence is evident

throughout, with redesigned magnetics and low mass coils using

copper-coated aluminium wire in the bass/midrange drivers, and

tiered crossover technology developed for the Reference Series.

As a result, what you hear is exactly what the original artist

intended. Musically voiced, articulate and as beautifully built

as the rest of the range, the XQ20 comes with the option of

matching extruded aluminium stands and the choice of three

chic modern ﬁnishes.

THE XQ20

Full bandwidth two-way stand mount/

bookshelf speaker

KEF’s latest 165mm (6.5in.) Uni-Q midrange/HF

‘point source’ array with new ‘tangerine’ waveguide

Natural-sounding high performance elliptical dome

19mm (0.75in.) tweeter

Low distortion 165mm (6.5in.) driver

Magnetically shielded, with a choice of three superb

high gloss ﬁnishes and optional stand

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SOPHISTICATED STAND MOUNT

XQ20

The XQ20 boasts the same large Uni-Q driver as the

ﬂagship XQ40 in a stand mount format, so its mid and

treble performance envelope is similarly impressive.

Piano Black Birdseye Maple Khaya Mahogany

Packed with technology derived from the Reference Series,

it features KEF’s new generation Uni-Q array and ‘tangerine’

waveguide: a stunningly natural-sounding elliptical dome 19mm

(0.75in.) tweeter perfectly time-aligned with the surrounding

midrange/bass cone to disperse the sound far more evenly

across the listening area than is possible with conventional

speakers. Power handling and dynamics are exceptional, and

the curved side panels of the reﬂex-ported cabinet are

contoured to eliminate any distortion from internal resonances.

What you experience is a gloriously intricate sound image – pure,

clean and true, even when played loud. Whether you prefer

string quartets, arias, sax solos or drum and bass, its musicality

shines through – and with ﬁlm or game soundtracks, it has the

power to keep you on the edge of your seat. A speaker that’s

big in everything but size.

THE XQ10

Two-way bookshelf speaker with excellent power

handling and dispersion characteristics

Advanced 130mm (5.25in.) Uni-Q‘point source’

array with new ‘tangerine’ waveguide

Audiophile quality elliptical dome 19mm (0.75in.) tweeter

Outstanding build quality and detailing

Magnetically shielded, with a choice of three superb

high gloss ﬁnishes

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ACCOMPLISHED BOOKSHELF SPEAKER

XQ10

Space being at a premium needn’t mean compromising

on sound quality; many serious audiophiles regard the

compact XQ10 bookshelf speaker as the rightful heir

to the revered LS3/5a professional studio monitor,

which aﬁcionados believe has never been surpassed for

its vocal clarity.

Piano Black Birdseye Maple Khaya Mahogany

Originally developed for the BBC,the LS3/5a is such a legendary product that it has taken

30 years for a loudspeaker to attain similar midrange accuracy – that speaker is the new XQ10.

LS3/5a XQ10

Like the XQ30 ﬂoorstander, the 130mm (5.25in.) central Uni-Q

midrange/HF array incorporates the sophisticated elliptical metal

dome tweeter and new ‘tangerine’ waveguide that reproduces

any vocals with such unerring accuracy. On either side, a pair

of KEF’s renowned 130mm (5.25in.) bass drivers in their own

dedicated enclosures deliver the hefty frontal slam that brings

on-screen action right out into the room. Every component,

right down to the tiered high order crossovers developed from

the Reference Series, is meticulously engineered to eliminate

distortion and capture every last subtlety in the recorded signal.

It’s a combination that creates a breathtakingly real sonic image,

especially with the latest digital formats such as SACD and DVD-A.

Richly expressive, disarmingly natural – and for every viewer,

wherever they sit in the room, an utterly compelling experience.

CENTRE STAGE

XQ50c

THE XQ50c

Slim, full bandwidth three-way centre channel

home theatre speaker

130mm (5.25in.) Uni-Q‘point source’ array with

exceptionally wide, even dispersion

Audiophile quality elliptical dome 19mm (0.75in.)

tweeter with new ‘tangerine’ waveguide for natural-

sounding vocals and wide dispersion

Two independently loaded 130mm (5.25in.) bass

drivers with ultra-low distortion motors

Magnetically shielded, with a choice of three superb

high gloss ﬁnishes

Piano Black

Birdseye Maple

Khaya Mahogany

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The centre channel is the most important speaker in any

surround sound home entertainment system, which is why

the three-way XQ50c is so lavishly speciﬁed.

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Using aerospace technology to mount the tweeter at the precise

acoustic centre of the midrange cone, both act as a single, time-

aligned point source that disperses an accurate sound image evenly

throughout the room.This has two main beneﬁts: everyone in the

room experiences the same accurate 3D effects (as opposed to

just those in the conventional ‘sweet spot’); and it gives you far

greater freedom to position the speakers where it suits you.

The new Uni-Q array in the XQ has been further reﬁned, with

a sophisticated new 19mm (0.75in.) elliptical dome tweeter,

improved acoustic geometry and ‘tangerine’ waveguide for even

more realistic vocals and even smoother, louder and clearer high

frequency response.

Uni-Q

THE Uni-Q Driver

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KEF’s patented Uni-Q driver conﬁguration is what makes the

XQ range sound noticeably better than conventional speakers

in normal rooms.

ACOUSTIC INTELLIGENCE

KEF Reference Series

– Visionary innovation

dB. Level. Sound Pressure

100

500 1k 2k 5k 10k 20k

Frequency, Hz

dB. Level. Sound Pressure

Frequency, Hz

0 50 100 200 500 1k

dB. Level. Sound Pressure

100

500 1k 2k 5k 10k 20k

Frequency, Hz

dB. Level. Sound Pressure

Frequency, Hz

0 50 100 200 500 1k

The XQ LF driver – top line indicates the improved and

increased dynamic range of the LF driver, the lower line

illustrates the reduced harmonic distor tion

Response comparison – grey line indicates response without the

‘tangerine’ waveguide, and white with ‘tangerine’ waveguide

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At the lower frequencies, the new LF drivers are equally

impressive. Redesigned magnetics and low mass coils of edge-

wound copper coated aluminium wire allow the cone greater

length of travel for gloriously extended bass. Faraday loops are

also incorporated to improve dynamics and reduce harmonic

distortion further still.

The KEF technology advantage doesn’t stop there. Inside, there

are literally dozens of reﬁnements and innovations, from ultra-

low distortion motor systems that deliver a more open, natural

sounding bass to audiophile grade tiered crossover technology

originally developed for the Reference Series.

Redesigned LF driver for

improved dynamic range

Total

THE Details

Everywhere you look, there’s evidence of KEF’s obsessive

attention to build quality.

ATTENTION TO DETAIL

The internal bracing is computer optimised to tailor the exact

volume of each enclosure to the drive unit it houses. As simple

as it sounds, even an apparently minor innovation like having the

grilles held in place by concealed magnets subtly improves the

lines of the bafﬂe as well as being a tactile pleasure to use.

Having gone to such lengths to perfect the cabinet design,

an equal amount of thought went into selecting ﬁnishes of

commensurate quality: three sleek new mirror-gloss options

(see page 22) in hand matched Birdseye Maple or Khaya

Mahogany veneers as well as classic Piano Black.

This is where advanced technology meets sheer craftsmanship.

And it shows.

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Precision cabinet engineering

to eliminate cabinet vibration

and colouration

Titanium ﬁnished driver arrays, for example. Ports radiused

to exactly the right proﬁle with painstaking care. Extruded

aluminium stands that combine stability with discreet style.

Even the shape of the cabinets themselves is determined by

acoustic considerations as much as aesthetic ones. As well as

being inherently more rigid than ﬂat sides, the distinctive curved

panels of the XQ Series are engineered to dissipate any internal

standing waves that might otherwise colour the sound over the

critical midrange frequencies.

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This ethos goes right back to 1961, when the company was

founded in the UK in an old Nissen hut near Maidstone, Kent

by the visionary sound engineer Raymond Cooke. A leading

authority on transducer technology, his passion for achieving the

most natural reproduction of recorded sound led to landmark

innovations such as the Model LS3/5a.This professional near-ﬁeld

monitor was designed by the BBC’s engineering department

around KEF drive units, and is still treasured for its unique neutral

tonal balance, extended treble response and astonishing bass

response. The spirit of this cherished ‘heritage’ model lives on

today in the new XQ10 compact monitor speaker featured on

pages 10 – 11 of this brochure.

THE KEF Pedigree

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Design superiority is ultimately about people, not things – and

it’s only by attracting outstanding talent that KEF has achieved

such an enviable worldwide reputation for innovation and

engineering integrity.

KEF loudspeakers have ranked among the ﬁnest in the world in

every decade since. No other manufacturer in the ﬁeld has a more

distinguished track record of design innovation,from revolutionary

driver concepts and radical new materials to the dozens of patent-

protected innovations to increase listening pleasure.

The exclusive limited edition Muon concept is a case in point.

Produced in collaboration with Internationally renowned

British Designer Ross Lovegrove, these giant organic columns of

superformed aluminium take the art of loudspeaker design to a

new level, where exquisite engineering meets inspired creativity.

The new XQ Series is the product of this same uncompromising

passion for excellence. Audition them, and you’ll hear what a

difference it makes.

AN UNRIVALLED PEDIGREE

Tomoyoshi Ezaki of Octavia’s Exton division – with his Reference Series studio monitors

Muon – a KEF concept designed by Ross Lovegrove

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Photograph: Martyn Goddard.

Courtesy Sunday Telegraph

Colour Supplement.

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