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Uncompromised Innovation

Obsessed with sound quality and committed to bringing a superior listening experience, our engineers created the revolutionary Concept Blade to showcase KEF’s technology leadership and powers of innovation with no preconceptions and restrictions. Since then, we keep pushing the boundaries of HiFi to create the loudspeaker with the best possible sound.

Uniquely KEF. Uniquely coherent.

At the heart of Blade lies Single Apparent Source technology; a unique technology that makes the Blade incredibly coherent, with noticeably more precise imaging. The latest version of Blade benefits from our latest acoustic innovation of the 12th generation Uni-Q® with Metamaterial Absorption Technology (MAT™).

Engineered and handcrafted in UK

Since 1961, we have been creating remarkable award-winning loudspeakers at our UK home in Maidstone, Kent. As our flagship HiFi speakers, Blade is still being designed, engineered, and handcrafted in Maidstone.

Specifications
Design
  • Three-way bass reflex
  • Single apparent source
Drive units
​​Uni-Q driver array:
HF: 25 mm (1 in.)  aluminium dome with MAT
MF: 125 mm (5 in.) aluminium cone

Bass units:
LF: 4 x 225 mm (9 in.) aluminium cone,
force cancelling
 
Frequency range free field (-6dB) 27Hz - 45kHz
 
Frequency range typical in room
bass response (-6dB) 20Hz
 
Frequency response (±3dB) 35Hz - 35kHz
 
Crossover frequency 350Hz, 2kHz
 
Amplifier requirements 50-400W
 
Sensitivity (2.83V/1m) 
88dB
 
Harmonic distortion 2nd and
3rd harmonics (90dB, 1m)
<0.5% 40Hz - 100kHz
<0.2% 200Hz - 2kHz
<0.1% 2kHz - 20kHz
 
Maximum output (SPL)
(peak sound pressure level at 1m
with pink noise)
117dB
 
Impedance 4 Ω (min. 2.8 Ω)
 
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.)
 
Standard finishes
  • Piano Black/Copper
  • Piano Black/Grey
  • Frosted Blue/Blue
  • Frosted Blue/Bronze
  • Charcoal Grey/Red
  • Charcoal Grey/Bronze
  • Racing Red/Grey
  • Arctic White/Champagne
 
KEF Color

Arctic White/Champagne, Charcoal Grey/Bronze, Charcoal Grey/Red, Frosted Blue, Frosted Blue/Bronze, Piano Black/Copper, Piano Black/Grey, Racing Red/Grey

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