KEF R Series R11 Floorstanding Speakers

£3,999.00
In stock
SKU
44965

The KEF R Series R11 Floorstanding Speakers are the flagship speaker in the R Series range, with four hybrid aluminium bass drivers for deep, impactful bass and a 5 inch midrange driver combined with a 1 inch tweeter in a Uni-Q driver array for a natural and refined delivery.



KEF R Series R11 Floorstanding Speakers

Uni-Q Driver

The R11 speakers feature KEF’s innovative Uni-Q driver array, where the tweeter is placed in the acoustic centre of the midrange cone. This brings the ideal solution of a single point source closer to realisation. The Uni-Q used in the new R Series is the 12th generation, benefitting from years of KEF’s refinement and development. The new Uni-Q driver has been designed using simulation and analysis tools, and reduces colouration by reducing resonance in the gaps between the separate elements, resulting in a purer, clearer sound with improved stereo imaging.

Shadow Flare

In order to minimise harmful cabinet diffraction for high frequencies, the R Series employs Shadow Flare technology, using a carefully profiled transition surface to extend the waveguide effect of the Uni-Q. The line of sight between the tweeter and the cabinet edges is no longer present, creating a shadow area at the places where the potential diffraction is highest. Reducing this diffraction helps to improve fine details, such as the subtle nuances of plucked strings and percussive sounds.

Bass Drivers

The R Series R11 speakers contain four bass drivers, to create a full, rich sound. The bass drivers are constructed using a two part structure, with a shallow concave aluminium skin placed over the paper cone. This creates a better stiffness in the cone, to deliver punch and speed for accurate bass reproduction. A newly designed magnet system produces a more even magnetic field to accurately control the powerful driver.

Cabinet Bracing

The cabinet bracing for the R11s uses constrained layer dampening to provide a solid platform for producing great sound. The damping has internal braces joined by a lossy interface, and is highly effective at dissipating unwanted resonances and vibrations that could alter the sound of the music.

Flexible Port Technology

The port design generates deep and articulate bass from the R11 speakers, by featuring innovative flexible walls. Designed with computational fluid dynamics, the flare and profile of the port is calculated to delay the onset of turbulence, while longitudinal resonances that may colour the midrange frequencies are prevented by the flexible walls of the bass port.

  • KEF R Series R11 Floorstanding speakers with four 6 inch bass drivers and Uni-Q driver array
  • Uni-Q driver places the tweeter in the centre of the midrange driver for ideal acoustic placement
  • Shadow Flare profiled transition surface extends waveguides to prevent cabinet diffraction
  • Bass drivers built with aluminium skin on a paper cone for greater stiffness
  • Constrained layer damping dissipates unwanted resonances
  • Flexible port technology delays the onset of turbulence and prevents resonance
More Information
Brands KEF
Product Specifications

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: 4x 165mm (6.5in.) hybrid aluminium

CROSSOVER FREQUENCIES         

400Hz, 2.9kHz

FREQUENCY RANGE       

30Hz-50kHz (-6dB)

TYPICAL IN-ROOM BASS RESPONSE        

26Hz (-6dB)

FREQUENCY RESPONSE

46Hz-28kHz (±3dB)

HARMONIC DISTORTION             

<0.3% 120Hz-20kHz (90dB, 1m)

MAXIMUM OUTPUT     

113dB

AMPLIFIER POWER         

15-300W (recommended)

NOMINAL IMPEDANCE

8 Ohms (min.3.2 Ohms)

SENSITIVITY       

90dB (2.83V/1m)

WEIGHT (Per Unit)

37.7 kg (83.1 lbs.)

DIMENSIONS (H X W X D)            

1295.5 x 310.6 x 383.5 mm

FINISHES             

Black Gloss / White Gloss / Walnut

 

Your Delivery:

Orders received before 3:00 pm will be despatched the same day and can be delivered for next working day, (except bank holidays).  For you convenience you can choose multiple shipping options on the checkout page. We will also email with your tracking and dispatch information.

30 Day Returns Policy

HiFix is committed to selling quality products which we hope you will love, we do understand, however, that there maybe a time when you need to exchange or return something you have bought. We really do hope you are pleased with your purchase but should you wish to return anything bought from us, we will be happy to refund or exchange a product within 30 days.

Name SKU Qty Lead time
KEF R Series R11 Floorstanding Speakers Black Gloss 44966 0 Warehouse stock availability 2 to 3 working days.
KEF R Series R11 Floorstanding Speakers Walnut 44967 0 Warehouse stock availability 2 to 3 working days.
KEF R Series R11 Floorstanding Speakers White Gloss 44968 0 Warehouse stock availability 2 to 3 working days.

Warranty information for KEF:

KEF

KEF products are designed and manufactured to the highest quality standards. However, if something does go wrong with the product we are here to help. From your date of purchase your product is warranted against faulty materials or workmanship for a period of 24 Months on Speaker Stands, 12 Months on Amplifiers, 60 Months On Speakers and 24 Months on Custom Install speakers.

This guarantee applies to all Kef Products including 5.1 home cinema speaker systems, book shelf speakers, rear speakers, award winning floor standing speakers, sound bars and sub woofers. Providing you with peace of mind and the assurance of premium Quality.


  • HiFix is a holding of Hi-Fi Excellence Ltd
  • VAT No. 585 1698 93
  • Company No. 2540830