| Content | “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
Q750 is the intermediate model for the Q Series floorstanders. Featuring the KEF signature Uni-Q driver array paired with an impressive 165mm (6.5 inch) aluminium bass driver and two matching ABRs, the Q750 combines astonishing sonic reproduction with powerful room filling bass.
| Model |
Q750 |
| Design |
Two and a half-way bass reflex |
| Drive Units |
165mm (6.5in.) aluminium Uni-Q
25mm (1in.)vented aluminium dome HF
165mm (6.5in.) aluminium LF
2 x 165mm (6.5in.)aluminium ABR |
| Frequency range free field |
42Hz (-6dB) |
| Frequency Response |
48Hz-28kHz (±3dB) |
| Crossover Frequencies |
2.5kHz |
| Maximum Output |
111dB |
| Amplifier requirements |
15-150W |
| Sensitivity |
88dB |
| Nominal Impedance |
8 Ohms (min.3.8 Ohms) |
| Dimensions |
H x W x D:
923 x 210 x 306 mm
977 x 323 x 310 mm (with Plinth) |
| Weight |
16.5kg (36.4lbs) |
| Unit measurement |
Pair |
Grille not included |
System Format: 3 Way
Frequency Response: 30 Hz - 60 kHz
Sensitivity (1W@1M): 90 dB
Nominal Impedance: 8 ohms
Maximum S.P.L
(Per pair in room): 116.8 dBA
Power Handling (RMS): 200 W
Recommended Amplifier Requirements (RMS): 100 - 200 W
Bass Alignment: Bass reflex. HiVe port system
Crossover Frequency: L.F - M.F: 790 Hz
M.F - H.F: 2.3 kHz
Drive Unit Compliment: 2 x 6.5" 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)
1060 x 210 x 330 mm
(41 3/4 x 8 1/4 x 13 inch)
Weight (each) Excluding stands: 27.2 Kg (59.9 lbs)
AVAILABLE IN SIX COLOR FINISHES
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System Format: 3 Way
Frequency Response: 32Hz - 35kHz
Sensitivity (1W@1M): 90dB
Nominal Impedance: 4 Ohms
Maximum SPL (dBA): 116.2
Power Handling (RMS): 175W
Recommended Amplifier Requirements (RMS): 50 - 175W
Bass Alignment: Bass reflex.
Twin HiVe®II port System
Tweeter Crossover Frequency: LF/MF: 300Hz
MF/HF: 2.2 kHz
Drive Unit Complement: 2 x 6" RST® Bass drivers.
1 x 6" RST® Bass/Mid driver.
1 x 1" (25mm) C-CAM® gold dome tweeter
Product External Dimensions:
(H x W x D)
inc. plinth & feet 960 x 275 x 388 mm
(37 13/16 x 10 13/16 x 15 1/4 inch)
Individual Weight: 21.76 Kg (47.88 lb) ![acrobat_reader_logo.]( "acrobat_reader_logo.") User's Manual ![finishes_higloss]( "finishes_higloss")
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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
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The CM8 is an elegantly proportioned, slimmed down version of the award-winning CM9. A true three-way loudspeaker that will appeal to discerning customers who demand the very best sound quality, but have limited space in which to achieve it.
Like all the models in the CM Series, the CM8 uses crossovers of remarkable simplicity and quality, so what you hear is that much closer to the sound of the original recording. In its functional perfection and understated elegance, itʼs nothing less than a masterpiece. Pure and simple.
All CM Series speakers come with chrome 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, the highly polished gloss black or the new stylish white.
30-200watt 8 Ohm
Dimensions: 990x200x300
ALSO AVAILABLE IN ROSENUT AND WENGE COLOR
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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.
| Woven Kevlar | Yes | | Crossover Tuning | Yes | | Nautilus Tapering Tube | Yes | | Flowport | Yes | | Mushrooms | Yes | | FST | Yes | | Technical features | Decoupled Double Dome aluminium tweeter with NautilusTM tube loading
Kevlar® brand fibre cone FSTTM midrange driver
Dual-layer aluminium cone bass driver
FlowportTM | | Description | 3-way vented-box system | | Drive units | 1x ø25mm (1 in) aluminium dome high-frequency
1x ø150mm (6 in) woven Kevlar® cone FSTTM midrange
2x ø165mm (6.5 in) aluminium cone bass | | Frequency range | -6dB at 30Hz and 50kHz | | Frequency response | 52Hz - 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)
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