KEF Blade Loudspeaker

KEF Blade in Orange Sorbet finish

“Delivers an inordinate quantity of sonic and musical delight” – The Absolute Sound 

KEF’s Amazing Blade – a 21st Century Statement!


“There are a handful of loudspeakers I’ve encountered at the countless audio demos and shows I’ve covered for Stereophile—models from, in alphabetical order, Dynaudio, Hansen, Magico, Revel, TAD, and Wilson come immediately to mind—that I would welcome hearing again, and be thrilled to enjoy in my own listening room. To this list I would add KEF Blade Loudspeaker”
– Jason Victor Serinus, Stereophile

“KEF’s amazing Blade is a statement speaker in so many ways: as an aesthetic object; as a culmination of knowledge and experience gained over 50 yrs; as a demonstration that advanced technology can solve certain problems that brute force and exotic materials cannot – AND proof that the predicted benefits are real; and as the fruition of 5 yrs. of work that has not only met but exceeded all of its design goals. The Blade is a speaker that delivers an inordinate quantity of sonic and musical delight – no matter what you are listening to!
– Alan Taffel, The Absolute Sound 

“Their combination of fit, finish and achievable performance represent exactly the sort of products not just that this industry should be making but that it must make if it wants to survive. A stunning indication of what happens when serious investment meets solid engineering and nobody applies the brakes on ambition, the KEF Blade Loudspeaker presents one of the most enjoyable and downright uplifting hi-fi experiences I have had in quite a while.”
– The Audio Beat, Roy Gregory (read the review)

KEF Blade Loudspeaker

“As effortless and soaring as you would imagine for such a large speaker, with no obvious box or cabinet sounds.”
– What Hi FI

“The KEF Blade Loudspeaker is very much a visual, as well as a sonic statement, and the bottom line is that this loudspeaker is a truly impressive technological achievement, stuffed with clever ideas that come together to deliver exceptional performance throughout the whole audio band.While the stereo imaging is its most outstanding and obvious characteristic, it’s also always very informative and entertaining across the whole gamut of musical styles and genres.”
– Hi Fi Choice

Best of the Best 2012: Audio
“A triumph of form and function, the KEF Blade Loudspeaker is a standout loudspeaker in its price class for its superb coherence and ability to reproduce complex audio at all frequency levels without distortion.”
– The Robb Report

KEF Blade Loudspeaker front


KEF Blade Loudspeaker

When KEF gave their engineers free rein to create a fitting showcase for their technology leadership, they developed an unparalleled sonic masterpiece that looks and performs like no other: The KEF Blade Loudspeaker, the world’s first single apparent source loudspeaker.

Conceived from the outset to extend the boundaries of high end audio, it’s a unique synthesis of innovative engineering and groundbreaking design based on a new architecture that achieves the ideal point source to which all speakers aspire. This is because the four sophisticated new bass drivers are configured so that their combined acoustic centre occupies exactly the same point in space as that of the Uni-Q HF/MF array, so the sound appears to emanate from a single, flawlessly coherent source.


Sculptural and acoustically inert, the slender parabolic enclosures are engineered never to interfere with the purity of the output. The advanced new hybrid cones are so light and rigid that their natural break-up point is never reached within the required frequency range.

Inside, you find ingenious new venting, bracing and wave management technologies. Meticulously specified, super-premium components – every one operating so comfortably within its performance envelope that you experience noticeably more precise imaging than is possible with conventional speakers. What you hear sounds as if it’s live – emotionally engaging, richly musical and effortlessly natural.

A revelation, pure and simple!

KEF Blade Loudspeaker top


  • 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 Response: 40Hz – 35kHz +/- 3dB, 28Hz – 45kHZ +/- 6dB
  • Harmonic Distortion: 2nd and 3rd harmonics (90dB/1m):
  • Crossover Frequencies: 350Hz, 3kHz
  • Amplifier Requirements: 50-400W
  • Sensitivity (2.83V/1m): 90dB
  • Maximum output (SPL): 117dB
  • Nominal impedance: 4 Ohms (3.2 Ohms min.)
  • Weight: 57.2 kg (126 lbs)
  • Dimensions: (H x W x D) 1590 x 363 x 540 mm, 62.5 x 14.3 x 21.2 in.
  • Standard finishes: Gloss black or gloss white
  • Custom colours: Garnet, Sapphire, Grigio, Racing red, Racing blue,
    Pale gold, Orange sorbet, Graphite, Stardust,
    Lemon sorbet, Lime sorbet or Snow white