KEF R11B Three Way Floor Standing Speaker (Black, Pair) has been discontinued, here are some related products you might like:
KEF R11B Three Way Floor Standing Speaker (Black, Pair)
Features
- 12th generation Uni-Q driver array
- Uni-Q Driver Array: HF: 25mm (1in.) MF: 125mm (5in.)
- Bass Driver: LF: 4x 165mm (6.5in.)
Description
The KEF R11B Three Way Floor Standing Speaker (Black, Pair) is the flagship of the R Series range. Boasting four 165mm (6.5 in.) hybrid aluminium bass drivers, R11 digs deep and retrieves an exceptionally clean and musical low-end performance. Nestled in the centre of these lies the 12th generation Uni-Q driver array. The 125mm (5 in.) midrange driver and 25mm (1 in.) aluminium dome tweeter combine to deliver an even more natural midrange and treble than believed possible at this price point. The result is a speaker that can pick out the softest details with grace and refinement, as well as deliver raw power and strength.
Key Features:
Shadow Flare
Derived directly from the Reference Series, the Shadow Flare is an innovative method of reducing harmful cabinet diffraction for delicate high-frequencies. Shadow Flare is a carefully profiled transition surface which extends the waveguide effect of Uni-Q. The tweeter no longer has a line of sight of the cabinet edges, creating a ‘shadow region’ at the points where the potential for diffraction is highest. The result is vastly improved fine detail, particularly when it comes to the subtle nuances of plucked strings and other percussive sounds.
Low-Frequency Drivers
Bass is the very foundation of music; everything is built upon it and maximising bass performance is a vital building block towards the pristine sound. R Series bass drivers are built using a two-part structure, where a shallow concave aluminium skin sits atop a paper cone. This great stiffness, combined with the cone’s unique geometry, delivers pure piston-like movement to deliver punch and speed. To accurately control this mighty driver, KEF has also completely redesigned its magnet system to create a more even magnetic field. The overall result is more impressive and impactful.
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.
Flexible Port Technology
When it comes to generating deep, articulate bass, port design is crucial. The ports in R Series feature innovative flexible walls. Using computational fluid dynamics, the flare and profile of each port are calculated to delay the onset of turbulence, while the flexible port walls prevent longitudinal resonances from colouring the midrange.
Beautiful by Design
Great design is timeless. KEF’s product designers seek to create deceptively simple, elegant loudspeakers. But form follows function. So whilst R Series is driven by acoustics, all visible engineering fixings have been artfully concealed so all the listener sees is a beautiful and simple exterior.
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: 4 x 165mm (6.5in.) hybrid aluminium |
Crossover frequency | 400Hz, 2.9kHz |
Frequency range (-6dB) | 30Hz-50kHz (-6dB) |
Typical in-room bass response (-6dB) | 26Hz |
Frequency response (±3dB) | 46Hz-28kHz (±3dB) |
Harmonic distorition (90dB, 1m) | <0.3% 120Hz-20kHz (90dB, 1m) |
Maximum output | 113dB |
Amplifier power (recommended) | 15 - 300W |
Nominal impedance | 8Ω (min.3.2Ω) |
Weight | 37.7kg |
Dimensions (H x W x D) with terminal | 1249 x 200 x 383.5mm with terminal |
Finish | High Gloss Black |
In The Box
- KEF R11B Three Way Floor Standing Speaker (Black, Pair)
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Details
- Product: KEF R11B Three Way Floor Standing Speaker (Black, Pair)
- Manufacturer: KEF
- Model: R11B
- SKU: R11B
- RM Product #: 63484
- Warranty: Click here for warranty terms view terms