Technology

"Sit anywhere" Uni-Q sound

The Uni-Q driver array places the tweeter in the centre of the midrange and bass cone, bringing the acoustic ideal of a single point source closer than ever. The result, enhanced by KEF's 'tangerine' waveguide over the tweeter, is a more accurate three-dimensional sound that's dispersed evenly throughout the room.

Tweaking the tweeter

With the addition of the damped tweeter loading tube providing a gentle termination of sound produced from the back of the tweeter, lower treble performance is improved dramatically and a new low-distortion inductor on the crossover provides cleaner bass.

A word about drums and bass

The Q Series reproduces the nuances of bass instruments with ease. With a larger roll surround and new suspension KEF drivers produce cleaner bass at high volumes.

A new cone structure improves midrange clarity and an enhanced Auxiliary Bass Radiator (ABR) with a new surround and rear suspension enhances bass quality.

New system design

Putting the Uni-Q driver in its own sealed cabinet reduces the load on the cone and increases clarity and detail while delivering cleaner bass. Midrange clarity is enhanced by driver improvements that mean the DC blocking capacitor to be eliminated from the crossover, allowing a more natural roll-off between drivers.

Weight

13.6kg(30 lbs)

Demension (H x W x D)

210 x 629 x 304 mm
214 x 629 x 304 mm (with Rubber Feet)

Design

2.5-way bass reflex

Unit Measurement

Piece

Sensitivity

87dB (2.83V/1m)

Frequency Range Free Field

55Hz (-6dB)

Frequency Response

64Hz-28kHz (±3dB)

Maximum Outout

110dB

Amplifier Requirements

15-150W

Nominal Impedance

8 Ohms (min.4.2 Ohms)

Drive Units

165mm (6.5in.) aluminium Uni-Q
25mm (1in.)vented aluminium dome HF
165mm (6.5in.) aluminium LF
165mm (6.5in.)aluminium ABR

Crossver Frequencies

2.5kHz

Finishes

Satin Black / Satin White

Downloads

Q Series User ManualQ Series Information SheetQ Series Brochure

Model Q650c Center Channel Speaker
Design Two and a half-way bass reflex
Drive Units Uni-Q driver array:
HF: 25mm (1in.) vented aluminium dome
MF: 165mm (6.50in.) aluminium Uni-Q
LF:165mm (6.5in.) aluminium
ABR: 165mm (6.5in.)aluminium
Frequency Range Free Field (-6dB) 55Hz
Frequency Response (±3dB) 64Hz - 28kHz
Crossover Frequency 2.5kHz
Amplifier Requirements 15-150W
Sensitivity (2.83V/1m) 87dB
Maximum Output 110dB
Nominal Impedance 8Ω (min.4.2Ω)
Weight 13.6kg (30 lbs)
Dimension (H X W X D) 210mm (8.26 inches) x 629mm (24.76 inches) x 304mm (11.96 inches)
Dimension (H X W X D) *with Rubber Feet 214mm (8.42 inches) x 629mm (24.76 inches) x 304mm (11.96 inches)

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