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31999.99

KEF Blade

$31,999.99

Only the finest dealers are approved to offer this product. Your purchasing experience should be worthy of a loudspeaker such as this, and should come with matching levels of service and support. Therefore upon inquiry or purchase of KEF Blade through KEF Direct, a KEF concierge will contact you to facilitate product shipment and delivery via a KEF Blade Authorized Dealer local to you. KEF Blade is the production version of the famous Concept Blade project KEF revealed at the Munich High End Show in 2009. Refined using ingenious new materials to replicate the shattering performance of the original, KEF Blade is a unique synthesis of cutting edge audio technology and groundbreaking design.

Priced as MATCHED PAIRS.

 

Product Features

The inspiration was simple: to give some of the world's most talented audio engineers complete freedom to create a speaker to showcase KEF's technology leadership and powers of innovation. No preconceptions. No need to use existing components. And no design or cost restrictions whatsoever. After three years of original research and exhaustive testing, what our team came up with looked and sounded like no other speaker: Concept Blade, whose startling acoustic precision was so enthusiastically acclaimed when it was first revealed at the Munich High End Show in 2009. But unlike glamorously radical concept cars that never see production, we decided it was simply too good not to take a step further.

Encouraged by all the reviews, and to mark KEF's 50th anniversary, the design team was given the go-ahead to develop this stunning concept for production, and two more years were spent painstakingly refining the concept to produce an edition that serious audiophiles could actually own. We devised ingenious applications of different new materials to replicate the shattering performance of the original, using innovative technologies to deliver the acoustic capabilities required of such a super-premium product.

We perfected a method of manufacturing the complex parabolic enclosures. The drivers gained sophisticated enhancements to recapture the magic of listening to the one-off prototype. What was previously thought impossible was set to become a reality. The result is KEF Blade - a unique synthesis of cutting edge audio technology and groundbreaking design. While the technologies involved are very advanced, the original focus on simplicity remains every single component operates so comfortably within its performance envelope that they work together as a single, flawlessly coherent unit - in effect, a giant full range Uni-Q driver array. Its a spectacularly lush, warm and expansive sound. Effortlessly accurate and as natural, intricate and emotionally authentic as a live performance.

If you're passionate about music, we think you'll agree that the years of development that made the concept a reality were very well spent indeed.

Single Apparent Source
Like listening to one voice rather than many, sound from a single source is inherently clearer. Not only are the acoustic centers of the HF and MF drivers in the Blade & Blade Two Uni-Q array coincident, but the four LF drivers, (9in. for Blade, or 6.5in. for Blade Two) are mounted symmetrically equidistant from it so that their acoustic centers occupy exactly the same point in space.

Force Cancelling
To avoid dissipating the energy of such potent bass drivers in exciting the cabinet (and thereby generating resonance, especially at high volume), the large kinetic forces involved are cancelled out by mounting the LF drivers rigidly together, back-to-back. By minimizing cabinet coloration, this highly effective configuration partly accounts for the Blade & Blade Two’s natural-sounding and engagingly musical performance.

Discrete Bass Chambers
The twinned pairs of bass drivers are mounted in discrete chambers separated by an internal partition. By increasing the frequency of any internal standing waves to way beyond the crossover point, this reduces the need for damping material (which can otherwise impair bass quality). Nothing has been overlooked in the quest for the ultimate clarity, right across the frequency range.

Terminals & Terminal Links
Two pairs of the finest audiophile quality WBT connectors allow bi-wiring or bi-amping to optimize the retrieval of low level detail in the music.

Low Order Crossovers
The simple low order crossovers specified for both Blade & Blade Two employ the best components available, carefully selected by a rigorous auditioning process so that every part of the signal path is fine-tuned for maximum clarity.

Hard Wiring
The patented screw-in linking plugs are to full audiophile specification (as well as simplifying set-up by eliminating fiddly wiring links). All the crossover components are individually wired by hand rather than mounted on a conventional printed circuit board. As well as being more environment-friendly, this optimizes both reliability and sound quality by assuring the cleanest possible signal transmission.

Click here to learn more about the KEF Blade at KEF.com

Reviews

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You're reviewing: KEF Blade

Spec
Model BLADE
Design Three-way bass reflex,
Single apparent source driver configuration
Drive Units Uni-Q driver array:
MF: 125mm (5in.) Li-Mg-Al /LCP hybrid cone
HF: 25mm (1in.) Al dome
Bass units:
LF: 4 x 225mm (9in.) with force cancelling
Frequency range free field (-6dB) 28Hz - 45kHz
Frequency range typical in room bass response (-6dB) 20Hz
Frequency Response (±3dB) 40Hz - 35kHz ±3dB
(-6dB at 28Hz)
Crossover frequency 350Hz, 2.3kHz
Amplifier requirements 50 - 400W
Sensitivity (2.83V/1m) 91dB
Harmonic distortion 2nd & 3rd harmonics (90dB, 1m) <0.5% 40Hz – 100kHz
<0.2% 200Hz – 10kHz
Maximum output (peak sound pressure level at 1m with pink noise) 117dB
Impedance 4Ω (min. 3.2Ω)
Weight 57.2 kg (126 lbs)
Dimensions - with plinth (H x W x D) 1590 x 363 x 540 mm
62.5 x 14.3 x 21.2 in.

** KEF reserves the right, in line with continuing research and development, to amend or change specifications. E&OE. **

Videos

KEF Blade Introduction:

KEF Blade Bass Driver:

KEF Blade Uni-Q Driver:

KEF Blade Single apparent Source:

KEF Blade Design & Designers:

Press and Awards
KEF BLADE TWO Review
KEF Blade Review
“Although not inexpensive, the price of a pair of KEF Blades just doesn’t seem that extravagant in the current high-end market. What you get for your money is without doubt one of the most beautiful loudspeakers available. But make no mistake. Looks aside, the Blades are all about engineering. Beware of being beguiled by their good looks lest you forget that what you are getting for all that cash: the most advanced state-of-the-art engineering you will find in a modern loudspeaker."
Year: 2017
Magazine / Issuing Body: Dagogo.com
Country of Publication: United States
Product: BLADE
 

 

KEF BLADE TWO Hi-Fi News & Record Review ‘Outstanding Product’ Accolade
Hi-Fi News and Record Review ‘Outstanding Product’ Accolade
“The huge soundstage populated by multiple guitars was as impressive as I’ve ever heard it."
Year: 2015
Magazine / Issuing Body: Hi-Fi News and Record Review
Country of Publication: United Kingdom
Product: BLADE TWO
 

 

KEF BLADE TWO Cutting-Edge Speaker Design: Blade Two
Cutting-Edge Speaker Design: Blade Two
"KEF’s Blade Two offers superb measured performance that is close to the state of the art"
Year: 2015
Magazine / Issuing Body: Stereophile Magazine
Country of Publication: United States
Product: BLADE

 

KEF BLADE Best Money-No-Object Speakers
Best Money-No-Object Speakers
 
Year: 2013
Magazine / Issuing Body: BT.com
Country of Publication: United Kingdom
Product: BLADE TWO

 

KEF BLADE Goldenes Ohr 2012
Goldenes Ohr 2012" 2. "Best floor standing Loudspeakers over 10.000 Euro
 
Year: 2012
Magazine / Issuing Body: Audio
Country of Publication: Germany
Product: BLADE
 

 

KEF BLADE Best of the Best 2012: Audio
Best of the Best 2012: Audio
 
Year: 2012
Magazine / Issuing Body: Robb Report
Country of Publication: United States
Product: BLADE
KEF BLADE Best of the Best Award 2012 Robb Report

 

KEF BLADE Stereo Sound Grand Prix Award 2011
Stereo Sound Grand Prix Award 2011
 
Year: 2012
Magazine / Issuing Body: Stereo Sound
Country of Publication: Japan
Product: BLADE
 
Stereo Sound Grand Prix Award 2011

 

KEF BLADE Products of the Year 2011 Award
Products of the Year 2011
 
Year: 2012
Magazine / Issuing Body: HiFi Review
Country of Publication: Hong Kong
Product: BLADE
 
KEF BLADE Product of the year award 2011 HiFi Review

 

KEF BLADE Winner of Innovative Operating Practices Award
Innovative Operating Practices Award
 
Year: 2012
Magazine / Issuing Body: EEF Future Manufacturing Awards
Country of Publication: United Kingdom
Product: BLADE
 
KEF BLADE Winner of Winners Award EEF

 

KEF BLADE Winner of Winners Award
Winner of Winners Award
 
Year: 2012
Magazine / Issuing Body: EEF Future Manufacturing Awards
Country of Publication: United Kingdom
Product: BLADE
 
KEF BLADE Winner of Winners Award EEF

 

KEF BLADE Products of the Year 2012 (Loudspeakers and Subwoofers)
Products of the Year 2012 (Loudspeakers and Subwoofers)
 
Year: 2012
Magazine / Issuing Body: Electronic House
Country of Publication: United States
Product: BLADE
 
Electronics House Products of the Year 2012 (Loudspeakers and Subwoofers)

 

KEF BLADE Grand Prix and Silver Award among all categories
Grand Prix and Silver Award among all categories
 
Year: 2011
Magazine / Issuing Body: Audio Accessory Winter 2011
Country of Publication: Japan
Product: BLADE
 
 

 

KEF BLADE AV Review
AV Review
 
Year: 2011
Magazine / Issuing Body: Special Planning Award
Country of Publication: Japan
Product: BLADE
 
 

 

KEF BLADE 1st Place - Over 2.5 Million Yen/PR
1st Place - Over 2.5 Million Yen/PR
 
Year: 2011
Magazine / Issuing Body: Stereo
Country of Publication: Japan
Product: BLADE
 
 

 

KEF BLADE HiFi Choice Awards.
Best of the High End Award
"A great high-end product should combine breath-taking performance with technical innovation and ground breaking design. Out of all the loudspeakers we have tested over the last year, the KEF Blade best embodies these attributes."
Year: 2011
Magazine / Issuing Body: Hi-Fi Choice Awards 2011
Country of Publication: United Kingdom
Product: BLADE
 
KEF Blade HiFi Choice Award

 

KEF BLADE Resi Awards
Resi Awards: Floorstanding Speaker
 
Year: 2011
Magazine / Issuing Body: Residential Systems
Country of Publication: United States
Product: BLADE
 
KEF Blade Residential Systems award

 

KEF BLADE Hi-Fi Choice 5 Star Editor's Choice Award
5 Star Editor's Choice Award
 
Year: 2011
Magazine / Issuing Body: Hi-Fi Choice
Country of Publication: United Kingdom
Product: BLADE
 
 

 

KEF BLADE Review Haute Fidelite
EXC!TE Award
 
Year: 2011
Magazine / Issuing Body: Custom Retailer
Country of Publication: United States
Product: BLADE
 
KEF BLADE Review Haute Fidelite

 

KEF BLADE Review Haute Fidelite
BLADE Review
 
Year: 2011
Magazine / Issuing Body: Haute Fidelite
Country of Publication: France
Product: BLADE
 
KEF BLADE Review Haute Fidelite
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