KEF Q550 Floor Speaker 2 and 1/2 Way 15-130W 87dB 5.25inch White

“Sit anywhere" Uni-Q Sound

At the heart of the evolved Q Series is the Uni-Q driver array. KEF\'s signature innovation places the tweeter in the acoustic center of the midrange cone, bringing the acoustic ideal of a single point source closer than ever to realisation. The result is a more detailed, more accurate three-dimensional sound image, which is dispersed more evenly throughout the room than is possible with a conventional speaker. Uni-Q\'s ultra-wide dispersion is further enhanced by KEF\'s \'tangerine\' waveguide over the tweeter dome.

Uni-Q sound taken to the next level

The closed box midrange cabinet design reduces the load on the Uni-Q midrange cone, increasing clarity and detail while delivering cleaner, punchier bass.

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 response.

Redesigned Bass Drivers

Low-frequency (LF) drivers now have a larger roll surround, along with a new spider suspension to produce cleaner bass at high volumes. A new cone structure improves midrange clarity, and an enhanced Auxiliary Bass Radiators (ABRs) with a new surround and rear suspension delivers better controlled and more impressive bass.

Redesigned Bass Drivers

Low-frequency (LF) drivers now have a larger roll surround, along with a new spider suspension to produce cleaner bass at high volumes. A new cone structure improves midrange clarity, and an enhanced Auxiliary Bass Radiators (ABRs) with a new surround and rear suspension delivers better controlled and more impressive bass.

Floorstanders
The Q550 is the smallest floorstander in the Q Series line. Featuring KEF\'s signature Uni-Q driver array paired with a 130mm (5.25 inch) aluminium bass driver and two matching ABRs, the Q550 delivers a phenomenal audiophile performance with clarity, scale, and controlled bass. Great for large or small rooms the Q550 is available in Satin Black or Satin White finishes. Priced as a pair.

Two way, double reflex
2 x Woofer 130 mm.
Covered paper, double magnet
Tweeter 24 x 50 mm.
Isodynamic mylar diaphragm
Impedance: 8 Ohm (min. 6,5)
RMS Power: 100 W
MAX Power: 150W
Efficiency: 90 dB/W/1m
Dimensions: 170x1080x260mm.
Weight: 17 Kg.
Finish: rosewood, black oak

2 x 6 ½ ¨ Polymer/Mica Cone
with Rubber Surround
1 x 1¨Silk Polymer Composite
Dome
Amplifier Power 20-250 W/ch
Impedance 8 Ohms
Sensitivity 90dB
Dimensions 102 x 22 x 40

ALSO AVAILABLE IN CHERRY COLOR

If itʼs hard to put the sound of the CM9 into words, thatʼs just as well. This top-of-the-range floorstanding speaker will fill even the largest domestic spaces with music so richly detailed, and so startlingly lifelike, that it will leave you speechless.

The three-way CM9 delivers truly commanding bass with the aid of twin 165mm paper/Kevlar® cone drive units. An FST® driver, with its characteristic compression surround supporting the outer edge of the distinctive Kevlar® cone, is specially developed for outstanding midrange performance. The CM9ʼs Nautilus™ tube-loaded aluminium dome tweeter keeps high frequencies crisp and sharp all the way up to 50kHz and beyond.

The quality of CM Series drive units has made it possible to use minimalist crossovers throughout the whole range. The resulting gentle transition between drivers avoids the unnaturally rapid changes in dispersion that bedevil more complex designs, while the high quality components, carefully chosen after exhaustive listening tests, ensure that as little as possible gets between you and the sound of the original recording.

All CM Series speakers come with aluminium driver trims. Grilles attach magnetically, so there are no unsightly grille-mounting features to spoil the clean lines of the speakerʼs façade. For the finish, you can choose either one of two real-wood veneers in Rosenut or Wengé, or a highly polished gloss black.

Technical features
    Nautilus™ tube loaded aluminium dome tweeter
    Kevlar® brand fibre cone FST midrange
    Flowport™

Description    3-way vented-box system
Drive units    1x ø25mm (1 in) aluminium dome high-frequency
    1x ø150mm (6 in) woven Kevlar® cone FST midrange
    2x ø165mm (6.5 in) paper/Kevlar® cone bass

Frequency range    -6dB at 30Hz and 50kHz

Frequency response    56Hz - 22kHz ±3dB on reference axis

Dispersion    Within 2dB of reference response
Horizontal:    over 60º arc
Vertical:    over 10º arc
Sensitivity    89dB spl (2.83V, 1m)

Harmonic distortion    2nd and 3rd harmonics (90dB, 1m)
   

Driver Complements
Subwoofer 2 - 6" Diameter (15.24cm)
Dynamic Balance Cassini Ovals with Super Cell Aerated Polypropylene diaphragms 2 - 5" Diameter (12.70cm)
Dynamic Balance Cassini Ovals with Super Cell Aerated Polypropylene diaphrams
Mid/Woofer 1 - 6 1/2" Diameter (16.51cm)
Dynamic Balance driver with Super Cell Aerated Polypropylene cone 1 - 5 1/4" Diameter (13.34cm)
Dynamic Balance driver with Super Cell Aerated Polypropylene cone
Midrange 1 - 3 1/4" Diameter (8.26cm)
Dynamic Balance driver with Super Cell Aerated Polypropylene cone 1 - 3 1/4" Diameter (8.26cm)
Dynamic Balance driver with Super Cell Aerated Polypropylene cone
Tweeter 1 - 1" Diameter (2.54cm)
Dynamic Balance Enhanced Ring Radiator Tweeter 1 - 1" Diameter (2.54cm)
Dynamic Balance Ehanced Ring Radiator tweeter
Electrical
Overall Frequency Response 20Hz-40kHz 22Hz-40kHz
Lower -3dB Limit 38Hz dB 42Hz dB
Upper -3dB Limit 30kHz dB 30kHz dB
Nominal Impedance compatible with 8 ohm outputs ohms compatible with 8 ohm outputs ohms
Recommended Amplifier Power 20-300 w/channel 20-250 w/channel
Efficiency 88 dB 88 dB
Crossover Orth Crossover Orth Crossover
Crossover
(mid-high array) 3000Hz 2800Hz
Crossover
(subwoofer) 100HZ 100Hz
Inputs Dual Gold-Plated Binding Posts Dual Gold-Plated Binding Posts
Dimensions
Cabinet Size 50 13/16" H x 9 1/2" W x 18 7/16" D
(129.06cm H x 24.13cm W x 46.83cm D) 47" H x 8 5/16" W x 14 3/8" D
(119.38cm H x 21.11cm W x 36.51cm D)
Footprint Size 10 1/2" W x 20 5/16" D
(26.67cm W x 51.59cm D) 9 1/4" W x 16 1/4" D
(23.50cm W x 41.27cm D)
Mounting Options floor floor
Enclosure Type Sealed Sealed
Enclosure Type
(subwoofer) Dual PowerPort Dual PowerPort bass venting
Shipping/Other
Product Weight 99.20 lbs. (45.00kgs) 78.00 lbs. (35.38kgs)
Shipping unit: each each
Total Shipping Weight 114.70 lbs. (52.03kgs) 86.40 lbs. (39.19kgs)
Speaker Warranty 5 years parts and labor (original purchaser) 5 years parts and labor (original purchaser)

ALSO AVAILABLE IN "EBONY" COLOR

Room-filling sound without a room-filling speaker cabinet. Slimmer than ever before, the 684 S2 offers an amazing combination of floorstander power, audio performance and unbeatable value.

Switching to 5-inch bass/midrange drivers from the previous 6.5-inch cones, means the 684 S2 is now significantly slimmer than its predecessor, with simultaneously improved audio performance, thanks to Bowers & Wilkins innovation. The two Kevlar cone drivers benefit from smaller voice coils to increase sensitivity.

The 5-inch drivers now also feature Anti-Resonance Plug dustcaps, technology taken from our high-end PM1 speakers, that improve pistonic movement inside the voice coil. This helps to deliver amazingly distortion-free midrange performance, all in a smaller space.

As well as slimmer, improved driver performance, the 684 S2 also features a Decoupled Double Dome tweeter. Double dome technology, brought across from the CM10, increases tweeter rigidity for a more precise sound, while the tweeter sits in a gel-filled cavity, decoupled from the surrounding cabinet - which removes resonances and vibrations, for a more natural, spacious sound.