| 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 |
Frequency Response: 48 Hz - 35 KHz
Sensitivity (1W@1m): 90 dB
Nominal Impedance: 8 Ohms
Power Handling Single (RMS): 100 W
System Power Handling (RMS): 150 W
Recommended Amplifier Requirements: 20 - 150 W
Maximum SPL (dBA): 108
Bass Alignment: Front and rear ported
Drive Unit Complement: 2 x 100mm (4“) MMP®II cone bass/mid driver.
1 x 25mm (1“) C-CAM® gold dome tweeter
External Dimensions
(H x W x D): mm (inches) 1000 x 125 x 140 mm
(39 3/8 x 4 15/16 x 5 1/2)
(Without spikes)
Weight (each):
Kg (lbs) 10.2 (22 1/2)
![acrobat_reader_logo.]( "acrobat_reader_logo.") User's Manual
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PRICE PER SPEAKER
Specifications | Recommended Usage | Front Speakers | | Type | 3-Way Bass Reflex Design |
|---|
| Woofers | Dual 6-1/2" PMD Cone |
|---|
| MidRange Driver | 5" Cone With Waveguide Horn |
|---|
| Tweeters | 1" Aluminum Dome With Waveguide Horn |
|---|
| Magnetic Shielding | Yes |
|---|
| Twin Bass Reflex Ports | Single Port |
|---|
| Gold-Plated Brass Extruded Terminals | Bi-Wiring Terminals |
|---|
| Frequency Response | 30 Hz - 35 kHz |
|---|
| Sensitivity | 88 dB/2.83 V/1 m |
|---|
| Input Power (Maximum / Nominal) | 250W / 100W |
|---|
| Impedance | 6 Ohms |
|---|
| Product Dimensions (W x H x D) | 8-3/4" x 38-9/16" x 13-9/16“ |
|---|
| Product Weight (lbs. each) | 20 Kg
|
|---|
| 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) |
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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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.
| Woven Kevlar | Yes | | Crossover Tuning | Yes | | Nautilus Tapering Tube | Yes | | Flowport | Yes | | Technical features | Decoupled Double Dome aluminium tweeter with NautilusTM tube loading
Kevlar® brand fibre cone bass/midrange drivers
FlowportTM | | Description | 2-way vented-box system | | Drive units | 1x ø25mm (1 in) aluminium dome high-frequency
2x ø130mm (5 in) woven Kevlar® cone bass/
midrange | | Frequency range | -6dB at 45Hz and 50kHz | | Frequency response | 72Hz - 22kHz ±3dB on reference axis | | Dispersion | Within 2dB of reference response
Horizontal: over 60º arc
Vertical: over 10º arc |
| Sensitivity | 87dB spl (2.83V, 1m) | | Harmonic distortion | 2nd and 3rd harmonics (90dB, 1m)
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