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3499.99

R11

CA $ 3,499.99

Flagship three-way floorstander

The largest model in the R Series combines four bass drivers and the latest generation Uni-Q for a powerful and refined sound

With hybrid aluminium bass drivers and a 12th generation Uni-Q for mid and treble the mighty R11is extremely capable. Using technology from KEF Reference it delivers clarity, finesse and serious bass.

Priced as a SINGLE speaker, please add two to your cart.

Product Features
KEF R Series three way flagship floorstanding speaker KEF R Series three way flagship floorstanding speaker
TECHNOLOGY
THE SCIENCE OF SOUND
Uni-Q
The evolution of KEF's Uni-Q driver reaches its 12th generation in the R Series. Using simulation and analysis tools KEF’s engineers have been able to dramatically reduce colouration by cutting resonance in the tiny gaps between Uni-Q’s elements. The result is purer and more precise sound with stronger imaging.
KEF R Series 12th generation Uni-Q driver
Shadow Flare
The Shadow Flare is an innovative way to cut harmful high frequency cabinet diffraction. It's a carefully profiled transition that extends the waveguide effect of Uni-Q. The treble escapes naturally because the ‘shadow region’ stops it getting to the cabinet edges. The result is vastly improved fine detail.
KEF R Series shadowflare
Low Frequency Drivers
R Series bass drivers have a two-part structure with a shallow concave aluminium skin atop a paper cone. Combine this stiffness with the cone’s unique geometry and you get near pistonic movement for punch and speed. KEF has also increased linearity in the magnet system which means more impressive and impactful bass.
KEF R Series Woofers
Flexible Port Technology
When it comes to generating deep, articulate bass, port design is crucial. The R Series ports have innovative flexible walls. Using computational fluid dynamics the flare and profile of each port is calculated to delay the onset of turbulence and the flexible port walls prevent resonances from colouring the midrange.
KEF R Series flexible port reduce turbulence
Cabinet Bracing
A solid platform is imperative for great sound. The new R Series benefits from Constrained layer damping. This system utilises internal braces joined by a ‘lossy’ interface and is highly effective at dissipating unwanted vibrations that would otherwise artificially change the sound and music.
KEF R Series cabinet has been designed to dissipate unwanted vibrations
Microfibre Grilles
The R Series was created to sound its best with or without grilles. The microfibre grille design is a first for KEF and not only looks beautiful but has a negligible effect on performance. They continue the tone-on-tone approach to match the various cabinet finishes and the edges are burnished for a suede-like effect.
KEF R Series Microfiber grilles
Reviews 3

Customer Reviews

  1. Fantastic Sound
    My KEF 107/2 at 28 years old needed alot of attention. I decided they needed to go to a new home where they could be rebuilt. As a lover of the KEF sound I called a friend who also is a KEF person told him my plans he told me listen to the R11's. With the situation could not go to his house or store to listen. Took his recommendation and ordered the R11. Wow just as I stated and he told me they are fantastic meet all my criteria. Clean clear sound voices and tight natural base nothing added and nothing missing! Just a point about my wife first impression she said to me "why do you have the center channel on." I showed I did NOT the image they create is spot on. I set the up according to instruction both toed in at angle equal to the ten ft spread. Don't miss out by not hearing them. My wife and I play music all day absolutely no listening fatigue! And the blacks are really sharp! All looks are cool.

    Review by

    Posted on

  2. These are Excellent speakers.
    The Kef R11 is a significant upgrade to almost any system. Clear sound, tight vocals, and flat balanced bass response. These speakers are perfectly poised for music and movies. I compared them to B&W and the new Martin Logan Motion XTi 60. It was a tough decision because the sound quality of all three is exceptional. I was leaning towards the Logans however made a decision base on the bass response. The only small complaint is that they sound muffled on low volume. You have to crank the capacity to get them to perform — otherwise, great speakers.

    While I tend to be frugal with my spending, these speakers are work of art and worth the price.

    Review by

    Posted on

  3. .
    I love this sound. It’s different, in a good way.
    Not a rock speaker ‘ but that’s okay, I’m not into loud rock. It’s more like a Van Morrison speaker.
    Really nice with vocals, and Jazz.
    The only complaint is the gloss black had bubbles,but they where returned no questions asked. Also good with blue’s music.
    Good clean bass.

    Review by

    Posted on

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Spec
Model R11
Design Three-way bass reflex
Drive Units Uni-Q Driver Array:
HF: 25mm (1in.) vented aluminium dome
MF: 125mm (5in.) aluminium cone
Bass Driver:
LF: 4 x 165mm (6.5in.) hybrid aluminium
Crossover frequency 400Hz, 2.9kHz
Frequency range (-6dB)
Typical in-room bass response (-6dB)
30Hz - 50kHz
26Hz
Frequency response (±3dB) 46Hz - 28kHz
Harmonic distortion (90dB, 1m) <0.3% 0.3% 120Hz - 20kHz
Maximum output 113dB
Amplifier power (recommended) 15 - 300W
Nominal Impedance 8Ω (min.3.2Ω)
Sensitivity (2.83V/1m) 90dB
Weight * 37.7 kg (83.1 lbs.)
Dimension (H x W x D)
with terminal *
1249 x 200 x 383.5 mm
(49.2 x 7.9 x 15.1 in.)
Dimension (H x W x D)
with terminal with Plinth *
1295.5 x 310.6 x 383.5 mm
(51 x 12.2 x 15.1 in.)
Finishes Black Gloss / White Gloss / Walnut

* Measurement per unit

** KEF reserves the right, in line with continuing research and development, to amend or change specifications. E&OE. **

Press and Awards
 KEF RSeries 2018 R11 The Absolute sound Review
Review
“Pleasing presence – sonically and aesthetically – remarkable realism and inter-driver coherence, high value in cost-to-performance arena…there’s a lot to love about the R11’s.”
Year: 2019
Magazine / Issuing Body: the abso!ute sound
Country of Publication: United States
Product: R11 Floorstanding Loudspeaker
 R11 The Absolute sound Review KEF RSeries 2018

 KEF R2018 R11 EISA Best High-End Speaker
Best High-End Speaker 2019-2020
KEF has been making great speakers for almost 60 years, but it’s hit a new high in style, performance and value with the new R Series. The R11 brings together all the elements of that success, from the latest generation coaxial Uni-Q driver for superb imaging and focus, anodised to match the choice of premium cabinet finishes, through to the clever microperforated grilles, which solve the old ‘on or off’ problem. The result is a slender speaker capable of a big, rich, room-filling sound packed with detail and delivering superb musical involvement, and with the style to ensure it looks every bit as impressive as it sounds.
Year: 2019
Magazine / Issuing Body: EISA
Country of Publication: United Kingdom
Product: R11 Floorstanding Loudspeaker
EISA Best High-End Speaker KEF R2018 R11

 KEF R Series 2018 R11 Soundstage Hifi Review
Recommended Reference Component
“KEF’s R Series R11 speaker impressed the heck out of me. First, it’s nice to look at -- a pretty speaker of first-class fit and finish, and color-coordinated from top to bottom. Second, it’s chock full of cutting-edge technological innovation: e.g., the 12th generation of KEF’s Uni-Q driver, Shadow Flare diffraction control, and flexible port linings. But none of that would matter without the third thing: the R11 sounds even better than it looks.”
Year: 2019
Magazine / Issuing Body: SoundStage! Hi-Fi
Country of Publication: United States
Product: R11 Floorstanding Loudspeaker

Downloads
R Series Brochure Open In New Window
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R Series Info Sheet Open In New Window
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R Series White Paper Open In New Window
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R Series User Manual Open In New Window
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Maintenance Guide for R Series Microfibre Grille Open In New Window
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Product Drawing Open In New Window
DXF File Download
DWG File Download

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