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* Sale Price includes 20% trade-in until 25th January 2013.
For further details please call us on 01202-730865/01722-322169


A class above


The multiple award-winning Q Series has always exemplified KEF’s conviction that new materials and technologies can, when applied with intelligence and imagination, reproduce recordings so perfectly that they sound indistinguishable from the live event. This is more true now than ever before. As the latest expression of this design philosophy, the new range immerses you in three-dimensional imagery of a richness and clarity that until now has been the exclusive preserve of speakers costing many times more.


The all new Q Series from KEF represents a quantum leap in terms of listening pleasure.


At its heart is a brand new Uni-Q driver array. Derived from the Concept Blade project, with a new, larger, high performance vented tweeter mounted at the acoustic centre of a new metal cone LF/MF driver, it combines lavishly extended bandwidth with effortless dynamics, imperceptible distortion and outstanding acoustic clarity.


These are speakers with the power to strike a chord in your heart. Off-axis dispersion is unrivalled, so everyone in the room enjoys the same exceptionally realistic sonic imaging, wherever they sit. And with 30% larger capacity cabinets for even gutsier bass and minimalist crossovers assuring deliciously fluid transitions, new Q is both more eloquent and more emotive than its illustrious predecessor.


Movies or music, Mahler or Massive Attack, what you experience is the captivatingly sweet, accurate and natural live sound of the original performance.


Bookshelf models


Whether as main speakers, music speakers for your study or family room, rear speakers in a home theatre system or general purpose speakers for multi-room set-ups, the two new Q bookshelf models open up a world of audiophile quality sound at a surprisingly affordable price.


The sound they make is even more surprising: lush, spacious and precisely defined, with compelling midrange/HF response and solid, immaculately controlled bass.The two models – Q100, with a 130mm (5.25in.) Uni-Q array and Q300 with the 165mm (6.5in.) variant – deliver all the benefits of the Uni-Q ‘point source’ configuration in its latest and most refined form: a more accurate sound image dispersed more evenly throughout the room than is possible with any conventional speaker.


Subjectively, it makes a huge difference. Because everyone in the room is enveloped in the same beautifully integrated three-dimensional sound image, viewing becomes more of a shared experience – and you no longer have to stay in the same spot to get the full enjoyment from your favourite tracks.


Technology with soul


The brilliantly innovative engineering of the new Q Series surrounds you with a spacious sonic image of astonishing purity.


A groundbreaking new Uni-Q array that conjures up a fluent, spacious and incredibly realistic 3D sound stage you can enjoy wherever you sit. A spectacular new high performance LF driver that delivers deeper, cleaner and more accurate bass. And a ‘total design’ approach, with obsessive attention to detail and the pleasures of ownership. These are the qualities that set the new Q Series apart.


All new Uni-Q array


Sweet, spacious and true, wherever you sit.


Thanks to the latest computer modelling techniques, years of painstaking development and a dash of design genius, the new iteration of the Uni-Q concept packs a formidable complement of design innovations. Based on the state-of-the-art HF driver developed for Concept Blade, the new Q boasts a much larger (25mm/1 in. dome) tweeter for increased sensitivity and distortion-free power handling. It plays as loud as it plays true.


The vented tweeter design allows upper registers to be reproduced with startling clarity and smoothes the transition to midrange frequencies. The dome assembly is cleverly braced, pushing the first breakup beyond the audible range so that the sound you hear is flawlessly accurate. And to make sure everyone in the room enjoys the benefit, KEF’s distinctive ‘tangerine’ waveguide over the dome maximises Uni-Q’s exceptionally wide dispersion characteristics.


At lower frequencies, the superlight new aluminium cone of the LF/MF drive unit delivers noticeably faster, cleaner response. This is enhanced by KEF’s unique Z-flex surround, which allows the extreme excursions needed to deliver a truly visceral thump while also maintaining a seamlessly smooth surface to disperse the high frequencies from the tweeter.


The ensemble is a masterpiece of modern acoustic engineering. Vocals suddenly seem much more immediate – more open and natural. Surrounded by sound of such clarity, you start hearing things you never did before. Nuances in the way an instrument’s played. The sound of a distant cricket in an outside scene. A breath, even. And best of all, you don’t have to be in a little ‘sweet spot’ to experience it. With KEF Uni-Q, you can sit where you want and not miss a thing. All you hear is what the artist intended.


Advanced bass technologies


Deeper, tighter and more accurate bass.


Featuring rigid new aluminium cone technology just like the Uni-Q array, the new Q Series advanced bass driver is a tour de force in its own right. A die-cast aluminium chassis rigidly locates the high efficiency vented magnet assembly to prevent unwanted resonance, and the large (50mm) voice coil ensures impressive power handling. Its musicality is impeccable: seductively tuneful and well controlled, and on the floorstanding models, complemented by dedicated front-firing auxiliary bass radiators (ABRs).


Deep, fast and powerful, this outstanding bass response is enhanced by new enclosures with massive internal bracing to eliminate resonance – and importantly, over 30% more volume than their predecessors. For movie effects, this noticeably enhances the realism of the sound when combined with the newly assertive midrange.


Total system design


A holistic approach with no compromises.


The performance envelope of these sensational new drive units is so generous that the signal needs minimal intermediation – simple first order crossovers are all that’s required, as you can tell from the transparency of the sound and the inaudibly fluent transitions.


You can see KEF’s legendary attention to detail everywhere. Gold plated bi-wire terminals for the clearest possible signal transmission, for example. Or the spikes on the floorstanders – they’re adjustable from the top instead of the bottom to make levelling easier. Thoughtful touches.


As you might expect from a company of perfectionists, we see more to the ownership experience than simply luxuriating in the best possible sound. We think about the environment too. When you unpack your new Q speakers, you’ll find that the packaging that protects them is ecologically sound. Because the crossover circuit boards are smaller, the materials impact is reduced.


And when you admire their sumptuous finish – in Black Oak, English Cherry or European Walnut – you can do so in the knowledge that what looks like a fine exotic hardwood veneer is in fact recycled wood fibre. This total design approach is another aspect of the difference with KEF. It’s all about weaving truly great sound into the fabric of the lives we live now.

Home > Speakers  > Subwoofers > KEF > KEF Q400b Active Subwoofer

KEF Q400b Active Subwoofer

Finishes: Black Oak, English Cherry, European Walnut
Warranty: 12 months
Available from: Poole & Salisbury
Delivery: In-Store Purchase Only (no mail order)

Sale Price: £384.00 (inc 20% trade in offer, usually £480)


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Design

Drive units

Frequencey respsone ± 3dB

Amplifier

Maxium output (SPL)

Low pass filter varible

Low level signal inputs

Internal volume

Power requirements

Power Consumption

Weight

Dimensions (H x W x D)

Closed-box subwoofer

1 x 250mm (10in)

28Hz - 140kHz

200W built-in Class-D

110dB

40Hz - 140Hz, 4th-order

RCA phono sockets

23.2 litres

100 - 240V ac - 50/60Hz

200VA

13.6kg (29.9lbs)

335 x 330 x 330 mm (13.12x 13.0 x 13.0 in.)


KEF Q400b Active Subwoofer KEF Q400b Active Subwoofer KEF Q400b Active Subwoofer

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