kef adds a new dimension to your dolby atmos experience

Recommended Setup Configurations
Because Dolby Atmos is not channel-based, you’re not limited to any particular playback configuration. As your Dolby Atmos A/V receiver
or pre-processor automatically allocates the sound output to whichever of the available speakers best reproduce the desired threedimensional effect, you can use any combination of:
• Dolby Atmos-enabled R50 speaker modules on your floorstanding or bookshelf speakers
• KEF wall-mounted speakers
• KEF custom installed ceiling speakers
5.1.2 – version with 2 x R50
5.1.4 - version 4 x Ci in-ceiling
What is Dolby Atmos®?
Dolby Atmos is a quantum leap forward in surround sound technology because it literally adds a new dimension to your
home theatre enjoyment.
In real life, sounds come from all around. But conventional channel-based surround systems only distribute sound in a horizontal plane: left
and right, ahead and behind. Fine – until you hear Dolby Atmos. What makes the experience so staggeringly realistic is that the movement
of each and every sound source in the scene is recreated as it moves through space – including vertically.
The effect is so real it’s scary. Rain sounds so much like rain that you feel like heading for cover. You find yourself ducking when a helicopter
flies low, or dodging when a bullet ricochets past. You can’t help it – sonically, it’s just as if you were actually there.
7.1.2 - version with 2 x Ci in-ceiling
7.1.4 - version with 4 x R50 + Side channels
How does it work?
Dolby Atmos is the first and only audio technology that’s based
on mapping the exact position of individual sounds (called audio
objects) in three-dimensional space rather than simply allocating
channels. Any sound can be an object – a creaking door, a passing
train, footsteps crunching on frosty leaves. As each object moves
through the scene, its sound does the same. So accurately you can
almost touch it.
Visit: for more about KEF and its products.
KEF reserves the right, in line with continuing research and development, to amend or change specifications. E&OE.
9.1.2 - version with 2 x R50 + 2 x side channels
9.1.4 - version with 4 x Ci in-ceiling + 2 x side channels
THX, the THX logo, and Ultra2 are trademarks of THX Ltd. THX and the THX logo are registered in the US and other jurisdictions. All rights reserved.
Dolby Atmos® is a registered trademark of Dolby Laboratories.
For movie director s and sound designer s, Dolby Atmos is
a powerful new creative tool for involving the audience, telling
the story and expressing their artistic vision. And for the viewer,
it’s the biggest advance in home theatre audio since the advent
of surround sound, because it immerses you in a dynamic, much
more authentic sound picture - and therefore, a more complete
emotional experience.
Dolby Atmos is infinitely more flexible and adaptable than channelbased home theatre. When a Dolby Atmos stream is fed to a Dolby
Atmos compatible A/V receiver, the receiver will render the objectbased audio to your home theatre’s unique speaker configuration to
precisely recreate the sound the filmmakers intended. Dolby Atmos
has the ability to adapt to diverse speaker setup. You can enjoy the
full effect with just seven KEF speakers.
What equipment do I need?
With an A/V receiver or pre-processor that supports Dolby Atmos decoding and playback in your system, you can play Dolby Atmos
content at home through any Blu-ray disc player or game console, or via your favourite streaming service (with the device set to bitstream
output and secondary audio disabled). Then it’s a just question of choosing the right speakers to add to your existing speaker set-up – and
as the pioneers of high definition home theatre sound, KEF is the audiophile’s choice.
KEF gives you two ways of reproducing the all-important vertical dimension encoded in Dolby Atmos soundtracks: by installing two or
four Ci Series flush-mount speakers in the ceiling of the listening area, or adding the new KEF R50 up-firing Dolby Atmos-enabled speaker
module to your existing front and rear satellites.
Either way, you’ll be astonished at what a difference it makes to your enjoyment of film. You’re ensconced in a truly three-dimensional
acoustic space populated by precisely located individual sounds, some loud, some barely perceptible, that all move in relation to you as they
would in real life. It’s uncanny. Exhilarating. Sometimes terrifying, sometimes hilarious; always engrossing.
With Dolby Atmos, you upgrade to a whole new dimension in home theatre enjoyment. And played through KEF speakers, you realise the full potential of
the new format. Heightened emotions and physical sensations. More intense involvement with the action on screen. A more complete experience – the
one the director intended.
Product Features
KEF Dolby Atmos speaker specifications
R50 Dolby Atmos-enabled speaker
Which KEF speakers to choose?
•High output two-way bass reflex music and home theatre speaker
•Uni-Q array with powerful 130mm (5.25-in.) aluminium bass/mid cone, Z-Flex surround and 38mm
(1.5-in.) vented aluminium dome tweeter with ‘tangerine’ waveguide
•Internally braced enclosure with damping panels to minimise cabinet resonance and colouration for
the purest, cleanest sound
Closed box
Nominal Impedance
Uni-Q driver array:
HF: 25mm (1in.) vented aluminium dome
Sensitivity (2.83V/ 1m)
LF/MF: 130mm (5.25in.) aluminium
Frequency response (±6dB)
33Hz - 28kHz
Frequency range (-6dB)
105Hz – 18.5kHz
Crossover frequency
Crossover frequency
Amplifier type
Class D
Amplifier requirements
25 - 100 W
Sensitivity (2.83V/1m)
Recommended Amplifier
Harmonic distortion
2nd & 3rd harmonics (90dB,
<0.4% 200Hz-20kHz
Product external dimensions
(H x W x D)
Φ290 x 132.6mm
Φ11.42 x 5.22 in.
Maximum output
Cut-out dimensions
Φ238mm (Φ9.37 in.)
Nominal impedance
8Ω (min. 4.8Ω)
Net Weight
3.6 kg (7.94 lbs)
126.5 mm (4.98 in.)
Drive units
In-ceiling speakers
R50 Dolby Atmos-enabled speakers
Ci Series in-ceiling speakers
The simplest option is to mount KEF’S new R50 Dolby Atmosenabled speakers above your existing floorstanding or bookshelf
home theatre speakers. Knowing how the brain subjectively
perceives sound, KEF engineers have perfected a way of beaming
the sound upwards so that it’s reflected by the ceiling to accurately
replicate the ver tical dimension encoded in Dolby Atmos
For the most cinema-like Dolby Atmos experience, you can
complement your 5:1 or 7:1 home theatre set-up with two or
four of KEF’s full range in-ceiling speakers to capture the vertical
dimension of the sound image.
R50 is the result. Designed to integrate perfectly with R Series and
Reference ranges aesthetically as well as sonically, the R50 is built
around KEF’s latest award-winning Uni-Q® driver array, originally
developed for the revolutionary KEF Blade.
With a sophisticated 25mm (1-in.) tweeter mounted at the exact
acoustic centre of a high performance 130mm (5.25-in.) bass/
mid driver, it has excellent dynamics and power handling with
exceptionally accurate, fast and clean midrange response. And
with KEF’s unique ‘tangerine’ waveguide precision engineered to
maximise the unusually wide and even dispersion characteristics of
the Uni-Q driver configuration, the R50 is ideally suited to beaming
the sound upwards to express the vertical dimension that makes
the Dolby Atmos experience so breathtakingly lifelike.
Whether you’re adding R50s to your existing satellite speakers or
upgrading to a new KEF home theatre system, no more space is
required – the speaker footprint is the same.
Discreet in appearance and easy to install, our Ci models are the
perfect sonic match for our freestanding speakers as they share
the same award-winning acoustic technologies, including KEF’s ‘sit
anywhere’ Uni-Q array. With the tweeter at the heart of the bass/
mid driver to create the perfect point source, it’s a configuration
that’s ideally suited to pinpointing sonic objects in three-dimensional
Which you choose will depend on the size of the area and the
power handling you require. The Ci160QR boasts a 19mm (0.75-in)
vented-tweeter in a 160mm (6.5-in.) bass/mid driver; the Ci200QR
uses a 25mm (1-in.) vented tweeter in a larger 200mm (8-in.) bass/
mid driver for greater LF extension. The high-output Ci200RR-THX
with THX Ultra2 approval steps up to a 38mm (1.5-in.) vented
tweeter in a 200mm (8-in.) bass/mid driver with a massive magnet
assembly for the deepest bass response.
All three models have the benefit of KEF’s unique ‘tangerine’
waveguide to maximise dispersion across the viewing area so that
everyone in the room enjoys the same precisely defined Dolby
Atmos sonic imager y. And with KEF’s Ultra-thin Bezel (UTB)
design, they lie practically flush with the ceiling with minimum visual
Whether you opt for the Ci160QR, Ci200QR or the formidably
competent Ci200RR-THX, the lucid, spatially exact and delicately
nuanced sound capabilities of KEF custom installed ceiling speakers
allow you to enjoy the full Dolby Atmos cinema experience in your
own home.
Ci200RR-THX, THX Ultra2 Certified, high output two-way Uni-Q home theatre and music
speaker (round)
•Uni-Q array with powerful 200mm (8-in.) aluminium bass/mid cone, Z-Flex surround and 38mm (1.5
in.) vented aluminium dome HF with ‘tangerine’ waveguide, projecting acoustically as if the sound was
originating from the screen
•Extreme power handling and output
Drive units
HF: 38mm (1.5 in.) Uni-Q
LF: 200mm (8 in.)
•Ultra-Thin Bezel for elegantly discreet appearance
4.5kg (9.9lbs.)
Mounting depth from surface
•Same diameter as all KEF 200mm (8-in.) in-ceiling speakers
(H x W x D)
172 x 176 x 254 mm (6.7 x 6.9 x 10 in.)
Not including the grille and the terminal
Optional rough in frame
Nominal Impedance
Nominal Impedance
Sensitivity (2.83V/ 1m)
Sensitivity (2.83V/ 1m)
Frequency response (±6dB)
35Hz - 34kHz
Frequency response (±6dB)
38Hz - 34kHz
Crossover frequency
Crossover frequency
Ci200QR two-way Uni-Q home theatre and music speaker (round)
•200mm (8-in.) Uni-Q array with 25mm (1-in.) aluminium dome tweeter with ‘tangerine’ waveguide
•Ultra-Thin Bezel for elegantly discreet appearance
•Gold plated, spring-loaded binding posts
•Same diameter as all KEF 200mm (8-in.) in-ceiling speakers
Ci160QR two-way Uni-Q home theatre and music speaker (round)
•160mm (6.5-in.) Uni-Q ar r ay and 19mm (0.75-in.) aluminium dome tweeter with
‘tangerine’ waveguide
•Ultra-Thin Bezel for elegantly discreet appearance
•Gold plated, spring-loaded binding posts
•Same diameter as all KEF 165mm (6.5-in.) in-ceiling speakers
Please note that the KEF Ci Series models shown here were chosen because they share the same driver
technology as the all-new R50. However, depending on space, budget and existing system configuration, any
model from the KEF’s extensive Ci Series range can be used to articulate the vertical acoustic dimension
encoded in Dolby Atmos. For more information on the Ci Series, see:
Drive units
Recommended Amplifier
HF: 25mm (1.0in.) Uni-Q
LF: 200mm (8.0in.)
Drive units
HF: 19mm (0.75in.) Uni-Q
LF: 160mm (6.5in.)
Recommended Amplifier
Product external dimensions
(H x W x D)
Diameter Ø: 289.6mm (11.4in.)
Depth: 109.8mm (4.33in.)
Product external dimensions
(H x W x D)
Diameter Ø: 234.6mm (9.24in.)
Depth: 98mm (3.86in.)
Cut-out dimensions
Diameter Ø: 240mm (9.45in.)
Cut-out dimensions
Diameter Ø:196mm (7.71in.)
Mounting depth from surface
Product only: 103.3mm(4.07in.)
Mounting depth from surface
Product only: 91mm (3.58in.)
Optional rough in frame
Optional rough in frame
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