Three-way centre speaker
For movie lovers looking for total immersion, Reference 4c is the paradigm. For clarity, detail and emotional depth, it's a revelation.
REFERENCE 4c
As the main source of dialogue and vocals, the centre channel is critical to your enjoyment of what's on screen. With KEF's superlative new 125mm (5 inch) MF/HF Uni-Q driver array and four 165mm (6.5 inch) bass drivers, the Reference 4c reproduces every last detail exactly as the director or the artist intended.
Two drivers, a single point
At the heart of The Reference is the Uni-Q™ point source driver array. A state-of-the-art vented aluminium dome tweeter at the exact acoustic centre of a highly sophisticated midrange driver that delivers flawless natural sound across a wider listening area.
A strong foundation
Clean, rich and articulate bass is the foundation of great stereo or multichannel sound. KEF's Reference Series bass driver has a massive vented magnet assembly, a large aluminium voice coil and an exceptionally light and stiff alloy cone. Whatever the volume, dynamics and power handling are superb.
The smallest details, revealed
Shadow Flare drastically reduces harmful cabinet diffraction, allowing the Uni-Q to work at its highest level. A precision-designed surface extends the waveguide effect of Uni-Q for improved clarity, particularly when it comes to the subtle nuances of plucked strings and other percussive sounds.
Computer-modelled perfection
Hand finished in pair-matched wood veneers, The Reference cabinets have computer-optimised bracing geometry to minimise secondary radiation from the sides and Constrained Layer Damping to turn what little vibration is left into heat.
Fighting turbulence
Flexible port technology is used to reduce port resonance. Each port is adjustable to allow users to modify the sound to suit their room. The flare and profile of each port is calculated by computational fluid dynamics to avoid turbulent air noise that might colour the sound.
Hand-picked components
KEF’s engineers use advanced software to model the ideal crossover. But every component is auditioned by the ultimate measure: the human ear. Perfection takes time, but the results are plain to hear. Reference crossovers are even decoupled from the cabinet to minimise vibration and crosstalk.
The Details
SPECIFICATIONS
Cabinet Finish
Silver Satin Walnut, Copper Black Aluminium, Blue Ice White
Weight
45.2kg (99.6lbs)
H X W X D With Grille And Terminal
H x W x D with grille, terminal & plinth :
205 x 1090 x 470 mm (8.1 x 42.9 x 18.5 in.)
205 x 1090 x 470 mm (8.1 x 42.9 x 18.5 in.)
Design
Three-way bass reflex
Frequency Range
Typical in room bass response: 33Hz (-6dB)
Free Field - Short port: 43Hz - 45kHz (-6dB)
Free Field - Long port: 40Hz - 45kHz (-6dB)
Free Field - Short port: 43Hz - 45kHz (-6dB)
Free Field - Long port: 40Hz - 45kHz (-6dB)
Frequency Response
48Hz - 35kHz (±3dB)
Harmonic Distortion
2nd & 3rd harmonics (90dB, 1m)
<0.5% 40Hz – 100kHz
<0.2% 200Hz – 10kHz
<0.5% 40Hz – 100kHz
<0.2% 200Hz – 10kHz
Maximum Output
116dB (peak sound pressure level at 1m with pink noise)
Amplifier Class
50-400 W
Sensitivity
90dB (2.83V/1m)
Nominal Impedance
8 Ohms (min.3.2Ohms)
Drive Units
Uni-Q driver array:
HF: 25mm (1in.) vented aluminium dome
MF: 125mm (5in.) aluminium
Bass units
LF: 4 x165mm (6.5in.) aluminium
HF: 25mm (1in.) vented aluminium dome
MF: 125mm (5in.) aluminium
Bass units
LF: 4 x165mm (6.5in.) aluminium
Crossover Frequencies
350Hz, 2.8kHz
** KEF reserves the right, in line with continuing research and development, to amend or change specifications. E&OE. **
KEF reserves the right, in line with continuing research and development, to amend or change specifications. E&OE.
AWARDS & REVIEWS
