|Warranty length||5 Years|
Design: Three-way bass reflex
Config: Single apparent source
Uni-Q MF: 5" Li-Mg-Al/LCP hybrid cone
Uni-Q HF: 25mm (1") Al dome
Bass LF: 4 x 9" (force cancelling)
Free Field: (-6dB) 28Hz - 45kHz
Typical room: bass resp (-6dB) 20Hz
(±3dB): 40Hz - 35kHz (-6dB @28Hz)
Crossover Frequency: 350Hz, 2.3kHz
Requirements: 50 - 400 W
Sensitivity: (2.83V/1m) 91dB
THD: (90dB, 1m) <0.5% 40Hz – 100kHz
THD: (90dB, 1m) <0.2% 200Hz – 10kHz
Max output: 117dB
Max SPL: 1m w pink noise
Impedance: 4Ω (min 3.2Ω)
Dimensions (HWD): 1590 x 363 x 540mm
Weight: 57.2 kg
Featuring a modern architecture that achieves the ideal point source, the kEF Blade's four complex 9" bass drivers are configured to occupy exactly the same point in space as the Uni-Q HF/MF array so the sound appears to emanate from a single seamlessly coherent source.
With a sturdy design and steady acoustics, the slender parabolic enclosures are engineered to eliminate any interfere with the output purity. Inside is intuitive new venting, bracing and wave management technologies. Every component operates comfortably within its performance envelope for more precise imaging than possible with conventional speakers.
Single apparent source
Like listening to one voice rather than many, sound from a single source is inherently clearer. Not only are the acoustic centres of the HF and MF drivers in the Blade & Blade Two Uni-Q array coincident, but the four LF drivers are mounted symmetrically equidistant from it so that their acoustic centres occupy exactly the same point in space.This single apparent source configuration is what makes the Blade so gratifyingly coherent across the frequency range, with noticeably more precise imaging than is possible from any conventional speaker. What you hear sounds as if it’s being performed live right in front of you.
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 minimising cabinet colouration, 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 optimise 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.
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 optimises both reliability and sound quality by assuring the cleanest possible signal transmission.
Kent Engineering and Foundry Editions
Asserting the sophisticated engineering, the stunning Blade & Blade Two cabinets are available in a range of impressive finishes: Piano Black, Snow White, Warm Metallic Grey, Light Metallic Silver, Racing Red, along with two specially commissioned ‘Kent Engineering and Foundry’ finishes, which celebrate 50 years of KEF’s unrivalled and continuous innovation. Like everything else about Blade, it's about getting every last detail absolutely right that's why KEF promises to match any colour you want.