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KEF Blade Speakers (Pair)


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Found it cheaper? Click here. SKU: KEFBLDE
Ex VAT: 16665.83
The KEF Blade speakers aim to perfect a revolutionary concept and are the world's first single apparent source loudspeaker with impressive sonic capabilities for serious audiophiles.

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Condition:Brand new in original retail packaging

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Product Video


Warranty length 5 Years
Brand KEF Speakers

Tech Specs

- Design: Three-way bass reflex
- Config: Single apparent source


Drive Units
- Uni-Q MF: 5" Li-Mg-Al/LCP hybrid cone
- Uni-Q HF: 25mm (1") Al dome
- Bass LF: 4 x 9" (force cancelling)


Frequency range
- 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

Product Description

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

Audio that comes from a single source is innately clearer comparable to hearing only one voice instead of many. For this reason, the acoustic core of the Uni-Q HF and MF driver array are parallel on top of which, the quad LF drivers are evenly spaced ensuring the acoustic centres are all in exactly the same point in space. The configuration results in the pleasantly coherent audio signature of the Blade with remarkable more accurate imaging than possible from a standard speaker.

Force cancelling

To evade dispersing the energy of such powerful bass drivers in thrilling the cabinet (thus producing resonance, particularly at loud volumes), the huge kinetic forces concerned are negated by mounting the LF drive units firmly end-to-end. By diminishing cabinet colouration, this vastly effective formation somewhat accounts for the Blade’s realistic and enchantingly melodic performance.

Discrete bass chambers

The matched pairs of bass drivers are installed in separate chambers divided by an interior barrier. By cumulating the frequency of any inner vertical waves to far past the crossover point, this lessens the necessity for damping material and prevents impairment of bass quality. Throughout the entire frequency range, not a single detail has been neglected in aiming for the ultimate clarity.

Terminals & terminal links

Dual pairs of the best audiophile class WBT connectors enable bi-wiring or bi-amping to maximise the recovery of low frequency elements in the sound.

Low order crossovers

The modest low order crossovers service the top mechanisms obtainable, well-chosen by a laborious testing process so that each portion of the signal route is tweaked for optimal lucidity.

Hard wiring

The audiophile-spec proprietary screw-in plugs simplify set-up by removing difficult wiring connections. Each component in the crossover is wired separately by hand instead of fixed on a traditional printed circuit board. This is more environment-friendly and augments both consistency and sound grade by pledging the cleanest conceivable signal conduction.

Kent Engineering and Foundry Editions

The elegant Blade cabinets are supplied in a range of impressive finishes: Snow White, Piano Black, Warm Metallic Grey, Racing Red and Light Metallic Silver as well as two custom-designed KEF finishes launched to celebrate 50 successful years in the industry. 

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