KEF Audio 3000 Series The Technology, ‘Sit anywhere’ Uni-QTechnology, Grilles, Stands, Finishes

The Technology

‘Sit anywhere’ Uni-Q Technology

KEF's patented Uni-Q driver configuration							The midrange cone now produces smoother
uses aerospace technology to mount the								sound thanks to radial reinforcing ribs
tweeter in the acoustic centre of the								for more ‘piston-like’ behaviour1,
bass/midrange		cone.		This	allows			and its rubber surround has been
both to act as a			single focused					re-profiled to deliver superior
source that disperses the sound						Typical loudspeaker		bass extension.
						cone
image	evenly	throughout			the
room, so you experience the same								The images left show scans from
3D effects wherever you sit.								KEF’s Laser Doppler Vibrometer2
The	all-new	Uni-Q		driver	array	KEF home theatre		illustrating		how speaker cones
of the 3000 series has been						3000 series cone		deform	in	normal	operation.
comprehensively			engineered for			even	The difference is plain to see, the KEF 3000
cleaner response.							series suffers less break-up and hence
							produces cleaner sound.

Sealed Suspension Technology

KEF’s unique new Sealed Suspension
Technology – SSTTM (patent	applied		Grilles
for) dramatically improves	sound		The grilles on the	centre	and	satellite
quality at higher volumes as		it
			speakers are held in	position	by	magnets,
provides the most effective	seal	of

giving a high quality, tactile feel, and because

the gap between the moving mid-range cone

it’s a closed loop magnet system, they won’t

and tweeter (see diagram).

interfere with your TV or any other nearby

electronic equipment. Very KEF - a typically

“Improving upon the already near perfect

ingenious touch.

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.

2.5

[%] Amplitude, Distortion (2nd + 3rd harmonics)

An element of loudspeaker design is

the ability to produce sound which is

2

as close as possible to the original

1.5

source. Distortion is the main factor

that impacts upon the quality of the

1

sound reproduced.

0.5

A distortion below 2% is considered

excellent.

The

KEF

3000

series

0

100

200

500

11K

2K

5K

10K

performs

within

a 0.3-0.8%

band,

Frequency [Hz]

Frequency [Hz]

KHT2005.2 satellite distortion

considerably better

than

this

KEF 3000 series satellite distortion

benchmark. See the distortion chart3

right, which shows the distortion measurements of the KEF 3000 series (green line) against its predecessor, the award winning KHT2005.2 series (red line).

1A piston-like motion of a speaker cone, with less deformation and break-up produces cleaner, less distorted sound.

2The 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).

3Distortion measured at 90dB.

Stands

The standard elliptical shelf stands (supplied with each satellite and centre speaker double up as unobtrusive wall brackets, and allow your satellites to be stably oriented in any direction. The elegantly simple optional floor stands (right) complement the satellite speakers in both form and function.

Finishes

When you're buying audiophile quality sound, you want your system to look the part. 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 contours of the enclosures. If you think the look makes a statement, wait till you hear the sound.