KEF Q750 Floor Speaker 2 and 1/2 Way 15-150W 6.5inch White

The largest speaker in the 600 Series. This floorstander is ideal for audiophile stereo and home theatre applications in larger rooms, delivering serious performance and amazing value.

The 683 S2 features a Decoupled Double Dome tweeter - technology evolved from Bowers & Wilkins CM10 speaker. The double dome design uses an extremely thin aluminium dome for lightness, surrounded by a thicker aluminium ring for rigidity. The result is a far more precise treble performance. And while the tweeter looks like it's part of the main speaker, it's physically separated in its own gel-filled cavity, so performance isn't hit by unwanted resonances or vibrations, for a more natural, spacious sound.

Serious and accurate bass performance is equally vital to such a room-filling speaker. That's why the 683 S2 features a new bass driver construction method, using a similar method of bracing to the tweeter with twin layers of aluminium. The richer, distortion-free bass response is sumptuous.

As well as new bass driver construction techniques and a new tweeter, brought in from Bower & Wilkins high-end series, the 683 S2 also boasts an FST Kevlar midrange driver. Serious technology, serious performance, but seriously affordable for a speaker of this calibre.

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.

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)
   

System Format:    3 Way
Frequency Response:    35 Hz - 60 kHz
Sensitivity (1W@1M):    89 dB
Nominal Impedance:    8 ohms
Maximum S.P.L
(Per pair in room):    114.5 dBA
Power Handling (RMS):    150 W
Recommended Amplifier Requirements (RMS):    100 - 150 W
Bass Alignment:    Bass reflex. HiVe port system
Crossover Frequency:    L.F - M.F: 400 Hz
M.F - H.F: 2.6 kHz
Drive Unit Compliment:    2 x 5.5" RST bass driver
1 x 4" RST mid-range driver
1 x C-CAM H.F ribbon transducer
External Dimensions excl Stand (H x W x D)

951 x 170 x 300 mm
(37 7/16 x 6 11/16 x 11 13/16 inch)
Weight (each) Excluding stands:    22.2 Kg (48.9 lbs)

Single Ported HiVe® II technology
Sealed Mid-range TLE®
2 x 6.5” long-throw RDT® bass drivers
1 x 4” RDT® mid-range driver
1 x C-CAM® high frequency ribbon transducer
All cabinet finishes have hand-upholstered front baffles in Ingleston Black premium grade leather.
Finish options: Santos Rosewood veneer with clear gloss piano lacquer
Ebony veneer with clear gloss piano lacquer
Piano black gloss
Optional dedicated floor stands are available

Frequency Response: 35 Hz - 100 KHz
Sensitivity (1W@1M): 90 dB
Nominal Impedance: 4 Ohms
Maximum S.P.L
(Per pair in room): 117.8 dBA
Power Handling (RMS): 250 W
Recommended Amplifier Requirements (RMS): 100 - 250 W
Bass Alignment: Rear Ported HiVe®II technology
Sealed Mid-range TLE®
Mid / H.F Crossover Frequency: 3600 Hz
Bass Low Pass Crossover Frequency: 600 Hz
Drive Unit Complement: 2 x 6.5" long-throw RDT® bass drivers
1 x 4" RDT® mid-range driver
1 x C-CAM® high frequency ribbon transducer
External Dimensions -
Including Fixed Plinth (H x W x D): 998 x 360 x 375 mm
(39 5/16 x 14 3/16 x 14 3/4 inches)
Weight (each) Including Plinth: 33Kg (72.7 lbs)

User's Manual

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