BLADE, the world's first Single Apparent Source loudspeaker, is the production version of the famous Concept Blade project KEF revealed at the Munich High End Show in 2009.
BLADE is an attitude. It's about exploring the art of the possible, without preconceptions. Pushing boundaries.
So we gave our most talented engineers carte blanche to create the best speaker they can, with no design or cost restrictions. After years of research and testing, what they came up with looked and sounded like no other speaker: Concept BLADE. Its startling acoustic precision was so acclaimed when it first broke cover that we spent two more years refining the concept to produce an edition that serious audiophiles could own and enjoy.
The result was so well received - and scooped so many prestigious awards to prove it - that we decided to take things even further and expand the BLADE range.
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
LF: 4 x 225mm (9in.) with force cancelling
Frequency Range 28Hz - 45kHz (-6dB) free field
20Hz (-6dB) typical in room bass response
Frequency Response 40Hz - 35kHz ±3dB (-6dB at 28Hz)
Crossover Frequencies 350Hz, 2.3kHz
Maximum Output 117dB (peak sound pressure level at 1m with pink noise)
Amplifier requirements 50 - 400 W
Sensitivity 91dB (2.83V/1m)
Harmonic distortion 2nd & 3rd harmonics (90dB, 1m)
<0.5% 40Hz - 100kHz
<0.2% 200Hz - 10kHz
Impedance 4 Ohms (min.3.2 Ohms)
Dimensions 1590 x 363 x 540 mm / 62.5 x 14.3 x 21.2 in. (with plinth H x W x D)
Weight 57.2 kg (126 lbs)