R100
Design Two-way bass reflex
Drive Units Uni-Q driver array:
HF: 25mm (1in.) vented aluminium dome
MF: 130mm (5.25in.) aluminium
Frequency range (-6dB) 49Hz - 45kHz
Frequency response (±3dB) 56Hz - 28kHz
Crossover frequency 2.5kHz
Amplifier requirements 25 - 100 W
Sensitivity (2.83V/1m) 86dB
Harmonic distortion
2nd & 3rd harmonics (90dB, 1m) <0.4% 150Hz-20kHz
Maximum output 107dB
Nominal impedance 8Ω (min. 3.2Ω)
Weight 6.6kg (14.5lbs.)
Dimension (H x W x D)
(with grille and terminal) 280 x 180 x 289 mm
(11 x 7.1 x 11.4 in.)
R300
Design Three-way bass reflex
Drive units Uni-Q driver array:
HF: 25mm (1in.) vented aluminium dome
MF: 125mm (5in.) aluminium
Bass units: LF: 165mm (6.5in.) aluminium
Frequency range (-6dB) 42Hz - 45kHz
Frequency response (±3dB) 50Hz - 28kHz
Crossover frequency 500Hz, 2.8kHz
Amplifier requirements 25 - 120 W
Sensitivity (2.83V/1m) 88dB
Harmonic distortion
2nd & 3rd harmonics (90dB, 1m) <0.4% 130Hz-20kHz
Maximum output 110dB
Nominal impedance 8Ω (min. 3.2Ω)
Weight 12kg (26.4lbs.)
Dimension (H x W x D)
(with grille and terminal) 385 x 210 x 345 mm
(15.2 x 8.3 x 13.6 in.)
R500
Design Three-way bass reflex
Drive units Uni-Q driver array:
HF: 25mm (1in.) vented aluminium dome
MF: 125mm (5in.) aluminium
Bass units: LF: 2 x 130mm (5.25in.) aluminium
Frequency range (-6dB) 39Hz - 45kHz
Frequency response (±3dB) 46Hz - 28kHz
Crossover frequency 500Hz, 2.8kHz
Amplifier requirements 25 - 150 W
Sensitivity (2.83V/1m) 88dB
Harmonic distortion
2nd & 3rd harmonics (90dB, 1m) <0.4% 120Hz-20kHz
Maximum output 111dB
Nominal impedance 8Ω (min. 3.2Ω)
Weight 21.8kg (48lbs.)
Dimension (H x W x D)
(with grille and terminal) 1015 x 180 x 305 mm
(40 x 7.1 x 12 in.)
Dimension (H x W x D)
(with grille, terminal & plinth) 1066 x 299 x 328 mm
(42 x 11.8 x 12.9 in.)
R700
Design Three-way bass reflex
Drive units Uni-Q driver array:
HF: 25mm (1in.) vented aluminium dome
MF: 125mm (5in.) aluminium
Bass units:
LF: 2 x 165mm (6.5in.) aluminium
Frequency range (-6dB) 37Hz - 45kHz
Frequency response (±3dB) 42Hz - 28kHz
Crossover frequency 500Hz, 2.9kHz
Amplifier requirements 25 - 200 W
Sensitivity (2.83V/1m) 89dB
Harmonic distortion
2nd & 3rd harmonics (90dB, 1m) <0.4% 100Hz-20kHz
Maximum output 113dB
Nominal impedance 8Ω (min. 3.2Ω)
Weight 25.9kg (57lbs.)
Dimension (H x W x D)
(with grille and terminal) 1070 x 210 x 345 mm
(42.1 x 8.3 x 13.6 in.)
Dimension (H x W x D)
(with grille, terminal & plinth) 1121 x 329 x 368 mm
(44.1 x 13.0 x 14.5 in.)
R900
Design Three-way bass reflex
Drive units Uni-Q driver array:
HF: 25mm (1in.) vented aluminium dome
MF: 125mm (5in.) aluminium
Bass units:
LF: 2 x 200mm (8in.) aluminium
Frequency range (-6dB) 35Hz - 45kHz
Frequency response (±3dB) 40Hz - 28kHz
Crossover frequency 400Hz, 2.9kHz
Amplifier requirements 25 - 250 W
Sensitivity (2.83V/1m) 90dB
Harmonic distortion
2nd & 3rd harmonics (90dB, 1m) <0.4% 80Hz-20kHz
Maximum output 115dB
Nominal impedance 8Ω (min. 3.7Ω)
Weight 29.5kg (65lbs.)
Dimension (H x W x D)
(with grille and terminal) 1130 x 240 x 365 mm
(44.5 x 9.4 x 14.4 in.)
Dimension (H x W x D)
(with grille, terminal & plinth) 1181 x 359 x 388 mm
(46.5 x 14.1 x 15.3 in.)
R200c
Design Three-way bass reflex
Drive Units Uni-Q driver array:
HF: 25mm (1in.) vented aluminium dome
MF: 125mm (5in.) aluminium
Bass units: LF: 2 x 130mm (5.25in.) aluminium
Frequency range (-6dB) 52Hz - 45kHz
Frequency response (±3dB) 65Hz - 28kHz
Crossover frequency 500Hz, 2.8kHz
Amplifier requirements 25 - 150 W
Sensitivity (2.83V/1m) 87dB
Harmonic distortion
2nd & 3rd harmonics (90dB, 1m) <0.4% 120Hz-20kHz
Maximum output 111dB
Nominal impedance 8Ω (min. 3.2Ω )
Weight 14.4kg (31.7lbs.)
Dimension (H x W x D)
(with grille and terminal) 170 x 530 x 305 mm
(6.7 x 20.9 x 12 in.)
R600c
Design Three-way bass reflex
Drive Units Uni-Q driver array:
HF: 25mm (1in.) vented aluminium dome
MF: 125mm (5in.) aluminium
Bass units: LF: 2 x 165mm (6.5in.) aluminium
Frequency range (-6dB) 50Hz - 45kHz
Frequency response (±3dB) 60Hz - 28kHz
Crossover frequency 500Hz, 2.9kHz
Amplifier requirements 25 - 200 W
Sensitivity (2.83V/1m) 89dB
Harmonic distortion
2nd & 3rd harmonics (90dB, 1m) <0.4% 100Hz-20kHz
Maximum output 113dB
Nominal impedance 8Ω (min. 3.2Ω)
Weight 17.2kg (37.9lbs.)
Dimension (H x W x D)
(with grille and terminal) 200 x 630 x 335 mm
(7.9 x 24.8 x 13.2 in.)
R800ds
Design Three-way dipole
Drive Units Uni-Q driver array:
HF: 2 x 25mm (1in.) vented aluminium dome
MF: 2 x 130mm (5.25in.) aluminium
Frequency range (-6dB) 90Hz - 45kHz
Frequency response (±3dB) 100Hz - 28kHz
Crossover frequency 300Hz, 2.5kHz
Amplifier requirements 25 - 100 W
Sensitivity (2.83V/1m) 85dB
Harmonic distortion
2nd & 3rd harmonics (90dB, 1m) <0.4% 150Hz-20kHz
Maximum output 107dB
Nominal impedance 8Ω (min. 3.2Ω )
Weight 7.4kg (16.3lbs.)
Dimension (H x W x D)
(with grille and terminal) 180 x 350 x 184 mm
(7.1 x 13.8 x 7.2 in.)
R400b
Design Powered Subwoofer (Sealed)
Drive Units Bass units:
LF: 2 x 225mm (9in.)
Frequency range (-6dB) 26Hz - 140Hz
Maximum output 111dB
Amplifier 2 x 250W (500W)
integral Class-D
Low pass filter Variable 40Hz - 140Hz, 4th-order
Low level signal inputs RCA phono sockets
Internal volume 22 litres
Power requirements 100V - 120V / 220V - 240V
~ 50 / 60Hz
Power consumption 600VA
Weight 21.5kg (47.4lbs.)
Dimension (H x W x D)
(with grille, terminal & plinth) 365 x 330 x 351 mm
(14.4 x 13 x 13.8 in.)
Taken from KEF UK's website:
Quote:
Featuring many of KEF’s latest innovations in premium hi-fi and home theatre loudspeaker technology, the all-new R Series makes genuine audiophile standards of entertainment more affordable than ever before. Stunningly fluent new Uni-Q driver arrays combine with potent new bass drivers and many ingenious refinements to create a rich, spacious sound image of such accuracy that it approaches the benchmark standards of KEF’s legendary Reference Series.
The new Uni-Q MF/HF driver array is a masterpiece. Midrange response is amazingly fast and clean, thanks to a braced magnesium/aluminium alloy cone, with KEF’s Z-flex surround smoothing the transition to the front panel and a sturdy die-cast aluminium chassis that prevents resonance being transferred to the cabinet. At the acoustic centre of the midrange cone is the sophisticated vented tweeter that endows KEF Blade with such startlingly pure HF response. With a large neodymium magnet and a computer-optimised dome structure so stiff that it operates pistonically over its entire working range, the upper registers are articulated with flawless precision – and to capitalise on Uni-Q’s point source characteristics, KEF’s ‘tangerine’ waveguide helps to disperse the higher frequencies evenly across a wider angle to flood the room with an intricate and refreshingly natural soundfield. Operating together as a single, perfectly integrated voice, the array as a whole delivers a sweet, accurate sound of unprecedented clarity.
The new bass driver is equally impressive. The combination of a massive vented magnet assembly and a large, lightweight aluminium voice coil driving a light, stiff and strong hybrid cone assures clean, deep and uncompressed bass output with superb dynamics and power handling.
Inside the cabinets (in a choice of classic Piano Black and real wood veneer finishes in Rosewood or Walnut) every single component confirms KEF’s technology leadership. Computer-designed crossovers allow the level of each driver to be fine-tuned for a smoother, flatter response. Constrained layer damping panels prevent cabinet vibration from muddying the mid-range and bass – even the airflow through the reflex ports is managed using computational fluid dynamics to optimise acoustic integrity.
With nine timelessly handsome models including three assertive floorstanders, two bookshelf speakers, two fully-specified centre channels, dipole surrounds and a matching subwoofer, the all-new R Series represents a decisive step forward in the enjoyment of music or film. By incorporating the high end technologies of KEF Blade in a classically elegant format, it gives serious audiophiles phenomenally accurate reproduction that neither adds to nor subtracts from the original recording: refined, spacious and exquisitely detailed. For those whose appreciation of true audio excellence outstrips their bank balance, it’s the perfect buy.
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