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.
WEIGHT
37.7 kg (83.1 lbs.)
DIMENSION (H X W X D)
1249 x 200 x 383.5 mm (49.2 x 7.9 x 15.1 in.) with terminal*
DIMENSION (H X W X D)
1295.5 x 310.6 x 383.5 mm (51 x 12.2 x 15.1 in.) with terminal with Plinth*
DIMENSION (H X W X D)
1249 x 200 x 360 Cabinet only
DESIGN
Three-way bass reflex
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)
DRIVE 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
CROSSOVER FREQUENCIES
400Hz, 2.9kHz
