Flagship three-way floorstander
The largest model in the R Series combines four bass drivers and the latest generation Uni-Q for a powerful and refined sound
With hybrid aluminium bass drivers and a 12th generation Uni-Q for mid and treble the mighty R11is extremely capable. Using technology from KEF Reference it delivers clarity, finesse and serious bass.
With hybrid aluminium bass drivers and a 12th generation Uni-Q for mid and treble the mighty R11is extremely capable. Using technology from KEF Reference it delivers clarity, finesse and serious bass.
The Details
SPECIFICATIONS
Design
Three-way bass reflex
Driver 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
HF: 25mm (1in.) vented aluminium dome
MF: 125mm (5in.) aluminium cone
Bass Driver:
LF: 4x 165mm (6.5in.) hybrid aluminium
Weight
37.7 kg (83.1 lbs.)
Dimension (HxWxD)
1249 x 200 x 383.5 mm (49.2 x 7.9 x 15.1 in.) with terminal*
Dimension (HxWxD)
1295.5 x 310.6 x 383.5 mm (51 x 12.2 x 15.1 in.) with terminal with Plinth*
Sensitivity
(2.83V/1m) 90dB
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
8Ohms (min.3.2Ohms)
Finishes
Black Gloss / White Gloss / Walnut
KEF reserves the right, in line with continuing research and development, to amend or change specifications. E&OE. * Measurement per unit
AWARDS & REVIEWS
HI-FI NEWS
"They deliver a sound combining maturity and ease of listening with massive low-end punch when required, great imaging and fine detail. Choose one of the striking finishes to match your room, and just enjoy: this is high-end audio made easy." — 2018
Full review
BEST FLOORSTANDING LOUDSPEAKER AVTECH MEDIA AWARDS 2019/20
Music comes to life with precise focus and detail thanks to that single-point Uni-Q driver, the performance underpinned by a robust and weighty bass register.’
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