KEF R3 (unboxing unit)

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KEF R3

The R3 completely redefines the performance of a bookshelf speaker. No wonder, since it has the same drivers as the flagship R11. The 165 mm woofer is a true three-way speaker that pushes bass performance to new heights. The 125 mm midrange driver and 25 mm aluminum dome tweeter form a Uni-Q driver array that far exceeds expectations for the most compact main speaker in the series.


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Uni-Q

The use of a tweeter in the acoustic center of the midrange speaker brings us closer to the acoustic ideal of a point source. The new R Series features the new 12th generation Uni-Q driver developed with KEF’s proprietary simulation and analysis tool. KEF’s acoustic engineers were able to lower coloration by avoiding resonances in the transition gap between the tweeter and midrange of the Uni-Q driver. The resulting sound reproduction is even more precise and provides a much better stereo image.

SHADOW FLARE

The “Shadow Flare” is a direct descendant of the Reference Series and represents an innovative method of reducing damaging diffraction at the cabinet edges in the high frequency range. The “Shadow Flare” is a precisely profiled sound reflection surface that enhances the Uni-Q’s point source effect. As a result, the tweeter is no longer in the reflection range of the cabinet edges, creating a shadow area at these points of potentially highest diffraction. This design measure allows, among other things, more details of percussion or string instruments to be perceived.

LOW FREQUENCY DRIVER

Bass is the musical foundation on which everything is based, which is why improving bass performance is an essential component of a flawless sound. The R-Series diaphragms have a two-piece construction, with a flat, concave aluminum foil applied to a paper diaphragm. The resulting stiffness, combined with the unique geometry, delivers a movement that provides pressure and speed – similar to the piston of an engine. To drive this particularly powerful diaphragm, KEF has completely redesigned the magnet system to create an even more uniform magnetic field. The end result is overwhelming.

HOUSING CONSTRUCTION

For excellent sound, a stable cabinet is necessary. The new R series benefits from a new vibration damping system. This system uses internal clamps connected to a damping interface. The damping is extremely effective in dissolving unwanted vibrations that would otherwise alter the music in unwanted ways.

TECHNOLOGY OF THE FLEXIBLE BASS REFLEX TUBE

In producing deep, clear bass, the design of the bass reflex tube plays an important role. The R-Series bass reflex tubes feature an innovative, flexible wall. Computational Fluid Dynamics is used to calculate the aperture and profile each port to avoid turbulence, while the flexible bass reflex tube prevents longitudinal resonances from coloring the midrange.

Product Highlights
  • Three-way bass reflex system
  • Frequency response 58Hz-28kHz (±3 dB)
  • Maximum power 110 dB
  • Impedance 8ohm
  • Sensitivity 87dB
  • Type : 3 way speaker system
  • Frequency response lower limit (Hz) : 58
  • Frequency response upper limit (Hz) : 28000
  • Number of speaker boxes : 2
  • Type : Small/shelf speaker
  • Bass reflex system : Yes
  • Width (cm) : 19.96
  • Height (cm) : 42.2
  • Depth (cm) : 31.2
  • Weight (kg) : 13.5
  • Speaker type : Bookshelf speaker
  • Speaker system : 3-way speaker system
  • Cabinet (closed/bass reflex) : Bass reflex system
  • Efficiency/sound pressure (dB) : 87
  • Impedance (Ohm) : 8
  • min. recommended amplifier power (W) : 15
  • max. recommended amplifier power (W) : 180
  • Frequency response lower limit (Hz) : 58
  • Frequency response upper limit (Hz) : 28000
  • Crossover frequency low-mid (Hz) : 400
  • Crossover frequency mid-high (Hz) : 2900
  • Number of tweeters : 1
  • Number midrange : 1
  • Number of woofers : 1
  • diameter tweeter (cm) : 2.5
  • diameter midrange (cm) : 12.5
  • diameter woofer (cm) : 16.5
  • Number of speaker boxes : 2
  • Width (cm) : 19.96
  • Height (cm) : 42.2
  • Depth (cm) : 31.2
  • Weight (kg) : 13.5
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Merkmale

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