R8ACBL
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KEF
KEF R8ACBL
R8a Atmos Topper (Walmountable) Gloss B
Purchase subject to Kef approval
Call for availability
Retail: $1550.00 EA


Dolby Atmos flexible surround

The R8a works as a surround or rear speaker and can bounce sound off the ceiling to create truly cinematic scale with Dolby Atmos.

The flexible R8a can be wall mounted or placed on another speaker for Dolby Atmos height. It has a 130mm (5.25in.) Uni-Q array with a 25mm (1 in.) tweeter to steer the sound for genuine 3D results.

Priced as a PAIR of speakers.

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

 

Specifications

Model R8a
Design Two-way closed box
Drive Units Uni-Q Driver Array:
HF: 25mm (1in.) vented aluminium dome
MF/ LF: 130mm (5.25in.) aluminium cone
Crossover frequency 2kHz
Frequency range (-6dB) 96Hz - 19.5kHz
Frequency response (±3dB) 105Hz - 18.5kHz
Harmonic distortion (90dB, 1m) <0.3% 200Hz-20kHz
Maximum output 106dB
Amplifier power (recommended) 25 - 150W
Nominal Impedance 8Ω (min.4.2Ω)
Sensitivity (2.83V/1m) 86dB
Weight * 4.45 kg (9.8 lbs.)
Dimension (H x W x D)
with terminal *
173.8 x 174.6 x 259 mm
(6.8 x 6.9 x 10.2 in.)

* Measurement per unit

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


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