Uni-Q Driver Array
The R7 speakers feature KEF’s innovative Uni-Q driver array, where the tweeter is placed in the acoustic center of the midrange cone. This brings the ideal solution of a single-point source closer to realization. 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 coloration 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 minimize 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.
Low-Frequency Drivers
The R Series’ dedicated low-frequency drivers have a two-part structure, where a shallow concave aluminum skin sits atop a paper cone. This adds stiffness, while the cone’s unique geometry reduces resonances and delivers the pistonic movement that makes these drivers time so well. The new drivers also have a completely redesigned magnet system that creates a more even magnetic field, and a design spider that reduces harmonic distortion for a cleaner, more precise sound.
Bass Drivers
The cabinet bracing for the R7s 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 R7 speakers, by featuring innovative flexible walls. Designed with computational fluid dynamics, the flare and profile of the port are calculated to delay the onset of turbulence, while longitudinal resonances that may color the midrange frequencies are prevented by the flexible walls of the bass port.
As any hi-fi enthusiast knows, there's no shortage of compelling speakers these days. But its beauty is only revealed when the sound isn't right. Luckily, the KEF R11 Floorstanding Speaker, the flagship of the venerable British brand's midsize R-series, packs smart tech for great sound into a beautiful package and comes at a lower price than you might expect. Sitting above the entry-level Q-series and below the reference series, the R-series was first launched in 2011 but is now a new version for 2018. With the latest model, the midrange is Redesigned with the Signature of the R-series speaker.
