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The Technology
'Sit anywhere' Uni-Q Technology
KEF's patented Uni-Q driver configuration
uses aerospace technology to mount the
tweeter in the acoustic centre of the
bass/midrange cone. This allows
both to act as a single focused
Typical loudspeaker
source that disperses the sound
cone
image
evenly
throughout
the
room, so you experience the same
3D
effects
wherever
you
sit.
The
all-new
Uni-Q
driver
array
KEF home theatre
3000 series cone
of
the
3000
series
has
been
comprehensively
engineered
for
even
cleaner response.
[%] Amplitude, Distortion (2nd + 3rd harmonics)
2.5
2
1.5
1
0.5
0
100
200
500
11K
2K
Frequency [Hz]
KHT2005.2 satellite distortion
KEF 3000 series satellite distortion
right, which shows the distortion measurements of the KEF 3000 series (green line) against its
predecessor, the award winning KHT2005.2 series (red line).
1 A piston-like motion of a speaker cone, with less deformation and break-up produces cleaner, less distorted sound.
2 The KEF Laser Doppler Vibrometer is a scanning laser device that measures the precise diffraction of light from a moving device (in this
case the midrange speaker cone). Using this technique very small vibrations, normally invisible to the naked eye, can be recorded,
amplified and then viewed on a computer. (Measurement taken at 1500Hz).
3 Distortion measured at 90dB.
The midrange cone now produces smoother
sound thanks to radial reinforcing ribs
for
more
'piston-like'
behaviour
and its rubber surround has been
re-profiled
to
deliver
superior
bass extension.
The images left show scans from
KEF's Laser Doppler Vibrometer
illustrating
how
speaker
cones
deform
in
normal
operation.
The difference is plain to see, the KEF 3000
series
suffers
less
break-up
and
hence
produces cleaner sound.
An element of loudspeaker design is
the ability to produce sound which is
as close as possible to the original
source. Distortion is the main factor
that impacts upon the quality of the
sound reproduced.
A distortion below 2% is considered
excellent.
The
KEF
3000
series
5K
10K
performs within a 0.3-0.8% band,
Frequency [Hz]
considerably
better
than
this
benchmark. See the distortion chart
Sealed Suspension Technology
KEF's
unique
Technology – SST
for) dramatically improves sound
1
,
quality
provides the most effective seal of
the gap between the moving mid-range cone
and tweeter (see diagram).
"Improving upon the already near perfect
2
design wasn't easy. We had to make a rubber
seal that was light enough to move with a
speaker without affecting the sound, it's a
genuine innovation."
KEF Research Engineer, Jack Oclee-Brown.
Stands
The standard elliptical shelf
stands
(supplied
satellite and centre speaker
double up as unobtrusive wall
brackets,
and
satellites
to
oriented in any direction. The
3
elegantly simple optional floor
stands (right) complement
the satellite speakers in
both form and function.
new
Sealed
Suspension
Grilles
TM
(patent applied
The
grilles
at
higher
volumes
as
it
speakers are held in position by magnets,
giving a high quality, tactile feel, and because
it's a closed loop magnet system, they won't
interfere with your TV or any other nearby
electronic equipment. Very KEF - a typically
ingenious touch.
with
each
Finishes
When you're buying audiophile quality sound,
allow
your
you want your system to look the part.
be
stably
The 3000 series comes in a choice of High
Gloss Black or High Gloss Silver finishes;
whichever you choose, you'll find that the
surface reflections echo the distinctively
smooth
If you think the look makes a statement,
wait till you hear the sound.
on
the
centre
and
satellite
contours
of
the
enclosures.
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