KEF R3 Bookshelf Loudspeakers (Pair, Walnut)
- True three-way speaker
- 165mm bass driver
- 125mm midrange driver
- 25mm aluminium dome tweeter
- Uni-Q array
KEF R3 Bookshelf Loudspeakers redefines standmount performance. No surprise, as it shares the same drivers as the range-topping R11. A true three-way speaker, the 165mm (6.5 in.) bass driver pushes bass performance to new extremes. The 125mm (5 in.) midrange driver and 25mm (1 in.) aluminium dome tweeter creates a Uni-Q array that defies the expectations from the most compact main speaker in the range.
Placing the tweeter in the acoustic centre of the midrange cone brings the acoustic ideal of a single point source closer to realisation. The new R Series benefits from a new 12th generation of the legendary Uni-Q which has been extensively designed using KEF’s in-house simulation and analysis tools.
Shadow Flare is an innovative method of reducing harmful cabinet diffraction for delicate high-frequencies. A carefully profiled transition surface which extends the waveguide effect of Uni-Q.
R Series bass drivers are built using a two-part structure, where a shallow concave aluminium skin sits atop a paper cone.
The new R Series benefits from Constrained layer damping.
Flexible Port Technology
The ports in R Series feature innovative flexible walls. Using computational fluid dynamics, the flare and profile of each port is calculated to delay the onset of turbulence, while the flexible port walls prevent longitudinal resonances from colouring the midrange.
|Design||Three-way bass reflex|
|Drive units||Uni-Q Driver Array:
HF: 25mm (1in.) vented aluminium dome
MF: 125mm (5in.) aluminium cone
LF: 165mm (6.5in.) hybrid aluminium
|Crossover frequency||400Hz, 2.9kHz|
|Frequency range (-6dB)||38Hz - 50kHz|
|Typical in-room bass response (-6dB)||30Hz|
|Frequency response (±3dB)||52Hz - 28kHz|
|Harmonic distorition (90dB, 1m)||<0.3% 130Hz - 20kHz|
|Amplifier power (recommended)||15 - 180W|
|Nominal impedance||8Ω (min.3.2Ω)|
|Dimension (H x W x D) with terminal||422.2 x 199.6 x 335.5 mm|