KEF Audio Uni-Q User's Manual
Contents
1. KEF THE FACTS AND THE FEELING Fresh ideas are what we breathe but only obsession with detail can make them work People who know sound know KEF It s a name that commands such respect because We ve never been a me too manufacturer Ever since the early days of hi fi our approach has been driven by a passionate belief in the power of new materials new technologies and design ingenuity to heighten the enjoyment of recorded sound This is as true today as it was back in 61 when KEF was founded by Raymond Cooke which is why KEF speakers have ranked among the finest in the world in every decade since In that time KEF has pioneered many landmark innovations New diaphragm materials Neoprene damping The use of computer modelling in research and quality control Digital testing to unprecedented tolerances Total system design methods Conjugate load network techniques And arguably the greatest breakthrough of al the Uni Q array POD TECHNOLOGY Separating out the midrange and high frequency drivers into their own pods has long been a KEF tradition dating all the way back to 1977 with the worlds first speaker Model 105 1977 79 Model 105 4 1980 82 Model 105 2 1982 87 Model 107 1986 89 Raymond Cooke MBE 1925 1996 Founder of KEF based on technology originally developed for the NASA space programme and protected by world wide patents No other manufacturer has done more to advance the principle2. 20Hz 27kHz 2 8kHz 15 120W 90dB 108dB BU Tes 3 1kg 6 82Ibs 253 x 170 x 119 mm 10 x 6 7 x 4 7 in Video Grey Powered Subwoofers Model Design Drive units Frequency response 3dB Crossover frequency Amplifiers Maximum output Magnetic shielding Weight Dimensions H xW x D Finishes Stands Model Dimensions W x D Height PSW5000 bass reflex downward firing LF 380mm 15 18Hz 250Hz variable 1000W built in 18dB Yes 60kg 132lbs 545 x 590 x 590 mm 21 5 x 23 2 x 23 2 in Black Ash Maple or Cherry real wood veneer Q9c two way bass reflex LF 165mm 6 HF x 19mm 7 50Hz 27kHz 2 8kHz 15 120W 91dB I11dB BU Tes 6 2kg 13 6lbs 200 x 480 x 270 mm 7 9 x 18 9 x 10 6 in Black Ash Maple Dark Apple or Silver PSW4000 bass reflex downward firing LF 300mm 12 25Hz 250Hz variable 500W built in 10dB Yes 38kg 83 6lbs 465 x 495 x 495 mm 18 4 x 19 5 x 19 5 in Black Ash Maple or Cherry real wood veneer Reference 201 stand 280 x 375 mm I1 x 14 7 in 480 mm 18 9 in 203 four way reflex LF 2 x 165mm 6 MF x 165mm 64 HF x 25mm 1 SHF x 19mm 55Hz 55kHz 400Hz 2 7kHz 5kHz 50 200W 89dB 113dB 8Q 3 20 min Yes 26 5Kg 58 3lbs 1068 x 248 x 405 mm 42 x 9 8 x 15 9 in Black Ash Maple or Cherry real wood veneer XQ one three way bass reflex LF x 165mm 6
3. PSW2500 closed box 250mm 10 30Hz 150Hz variable 250W built in 108dB Yes 14 5kg 31 9lbs 360 x 495 x 325 mm 14 2 x 19 5 x 12 8 in Black Ash Maple or Dark Apple Reference 204c stand 1100 x 380 mm 43 3 x 14 9 in 465 mm 18 3 in 206DS four way reflex LF 2 x 165mm 64 MF 2 x 165mm 64 HF 2 x 25mm 1 SHF 2 x 19mm Y 204c four way reflex LF 4 x 165mm 64 MF x 165mm 64 HF x 25mm 1 SHF x 19mm Y 55Hz 55kHz 250Hz 2 7kHz 15kHz 53Hz 55kHz 400Hz 2 7kHz 5kHz 50 200W 50 300W 88dB 90dB 113dB 115dB 8Q 3 20 min 8Q 3 20 min No Yes 6kg 35 2Ibs 35Kg 77lbs 750 x 354 x 190 mm 240 x 1100 x 425 mm 29 5 x 14x 7 5 in 9 4 x 43 3 x 16 7 in Black Ash Maple or Cherry real wood veneer Black Ash Maple or Cherry real wood veneer XQ two c four way closed box LF 2 x 165mm 64 MF x 165mm 64 HF x 19mm 7 SHF x 19mm GY 60Hz 55kHz 350Hz 2 7kHz 5kHz 15 150W 89dB 10dB 80 3 20 min Yes 17 5kg 38 5lbs 231 275 x 630 x 302 311 mm 9 10 8 x 24 8 x 11 9 12 2 in Graphite Silver or Maranello Red QI two way bass reflex LF 165mm 6 HF x 19mm 7 45Hz 27kHz 2 8kHz 15 120W 91dB I11dB 80 Yes 6 25kg 13 8lbs 350 x 220 x 320 mm 13 7 x 8 6 x 12 6 in Black Ash Maple Dark Apple or Silver Q compact two way bass reflex LF 130mm 5 HF x
4. 19mm 50Hz 27kHz 2 8kHz 10 100W 89dB 109dB 80 Yes 3 9kg 8 6lbs 280 x 180 x 250 mm I x7 1 x 9 9 in Black Ash Maple Dark Apple or Silver PSW 1000 2 bass reflex downward firing 200mm 8 38Hz 180Hz variable 100W built in 106dB Yes 13 5kg 29 7Ibs 360 x 320 x 320 mm 14 2 x 12 6 x 12 6 in Black Ash Maple or Dark Apple Reference 202c stand 630 x 270 mm 24 8 x 10 6 in 460 mm 18 1 in 202c four way reflex LF 2 x 165mm 64 MF x 165mm 64 HF x 25mm 1 SHF x 19mm Y 65Hz 55kHz 400Hz 2 7kHz 5kHz 50 200W 89dB 113dB 8Q 3 20 min Yes 16Kg 35 2Ibs 240 x 630 x 315 mm 9 4 x 24 8 x 12 4 in Black Ash Maple or Cherry real wood veneer Q2ds three way dipole surround LF x 130mm 5 HF 2 x 165mm 6 80 27kHz 220Hz 3kHz 15 120W 91dB 11 1dB 80 No 7 7kg 16 9lbs 220 x 442 x 210 mm 8 7 x 17 4 x 8 3 in Black Ash Maple or Dark Apple XQ one stand 280 x 365 mm II x 14 4 in 622 mm 24 5 in KEF KEF AUDIO UK Eccleston Road Tovil Maidstone Kent MEI5 6QP U K Telephone 44 0 1622 672261 Fax 44 0 1622 750653 www kef com KEF America 10 Timber Lane Marlboro New Jersey 07746 U S A Telephone 1 732 683 2356 Fax 1 732 683 2358 Wwww kefamerica com KEF Austria Germany Liechtenstein Switzerland GP Acoustics GMBH HeinrichstraBe 51 D 44536 L nen Deutschland Tel 49 0
5. 231 9860 320 Fax 49 0 231 9860 330 Email sales gp gmbh com www gp gmbh com KEF and Uni Q are registered trademarks Uni Q is protected under GB patent 2 236929 and U S Pat No 5 548 657 Worldwide patents pending KEF reserve the right in line with continuing research and development to amend or change specifications The photographs in this catalogue show speakers in various finishes some of which may not be available in your territory This catalogue is printed using chlorine free materials and is fully recyclable PLI607EN
6. elliptical profile of the titanium dome tweeter whose output is fine tuned to the Uni Form wave guide It makes the human voice sound so real and so close that you start looking around for the source For the smoothest possible response much attention has been paid to evening out flux profiles Both MF and HF coils in the Uni Q driver share a compound twin neodymium magnet assembly and the two ultra low distortion 200mm 8 bass drivers have Model 203 The 203 shares all this technical virtuosity only on a slightly smaller scale Computer matched high order four way crossovers assure fluid transitions between the five drivers The Hypertweeter and the new Uni Q coincident source array together provide seamless mids and highs while the two high tech l65mm 64 LF drivers with KEF s high tech motor systems and stiff lightweight reinforced diaphragms deliver deliciously open bass with incredibly low distortion even at high volume The curved section cabinets are massively braced to eliminate box colourations and the open chassis design of the drive units with vented cones eliminates any trapped air you re into this is a supremely musical performer balanced Faraday loops above and below the coil to ensure perfect symmetry noise Magnetically shielded like the rest of the range the 203 combines Both long throw bass drivers operate in parallel at low frequencies where heavyweight muscle with intr
7. power 00 2k FREQUENCY Hz Ci Ref 2000 Always look for a wide dynamic range in a speaker the range of sound intensity that can be reproduced without distortion It s expressed as a ratio in decibels In speech this is rarely more than 40dB in orchestral works it can be as much as 75dB Judge whether loud passages sound appropriately louder than quiet ones Can you hear subtle changes when something else is playing loud Does music come to life at high volume or blur Ask yourself also whether the sound picture is complete at the frequency extremes Or has bass for example been sacrificed to midrange clarity Accuracy is a matter of how closely the speaker reproduces live sounds How much detail can you hear Do individual images sound separate from each other or are they like highlights in an acoustic soup Neutral balance gives the human voice a natural timbre without distortion at frequency extremes Listen for colouration do voices sound strange Is there too much sibilance Can you differentiate the sound of similar but different instruments Or does a violin sound like a viola a Stratocaster like a Les Paul Drive units Hi fi drivers are dedicated to different parts of the frequency spectrum Bass units reproduce sound between 20 to 500Hz midrange drivers carrying most of the identifying tones of music or speech usually from 200Hz to 4kHz and HF drivers tweeters from 2kHz to above 20kHz L
8. you sit Exceptional lucidity whatever the volume uncannily so with the latest digital formats If you want sound that takes you out of yourself take five XQ two c Serious technology and rightly so Watching movies nowhere is acoustic accuracy more important than in the centre channel The overall effect is so real it s unreal all the more so with digital media The rustle of a breeze Fingertips on frets Distant thunder Shoes creaking Cicadas in the grass The flautist s intake of breath You re there simple as that You don t even need to look you need two c The latest evolution of the acclaimed Q Series demonstrates how the listening benefits of KEF technology leadership cascade down from the Reference Series to more affordable ranges As the name implies New Q has all the inherent advantages of KEF Uni Q seamlessly fluid midrange consistent stereo imaging and the unrivalled off axis response that makes Uni Q speakers as easy to place as they are to drive It s no accident that the styling with the distinctive faired in Q7 The three way bass reflex Q7 is an unusually expansive performer and no wonder The 65mm _ 6 2 Uni Q midrange HF driver array incorporates KEF s sophisticated new 19mm 4 metal dome tweeter so midrange is silken and vocals outstandingly pure KEF s unique B169 racetrack format LF driver delivers terrific bass for such a slim cabinet Computer d
9. 00W power amp driving a 300mm 12 The multi purpose down firing long throw bass unit PSW3500 is PSW2500 active capable of generating a heftily extended bass image subwoofer has an over a very large area and with level phase and attractive curved frequency fully adjustable via infrared remote cabinet which styling to match In each case both frequency cut off and output levels are easily adjusted to match the main speakers and room acoustics PSW4000 Serious stuff No less than 500W of high efficiency Class D amplifier power with a 300mm 12 long throw driver in a hand finished MDF cabinet As you would expect bass extension is more than generous but what s really impressive is the way low frequency response is immaculately controlled Output level phase infinitely variable and the low pass filter frequency can be adjusted via radio remote control from anywhere in the home so the unit can be concealed wherever you please PSW1000 2 A 100W on board amplifier driving a 200mm 8 bass driver adds a powerful extra dimension to the p 3D sound image A reflex design with carefully contoured ends to the racetrack port to eliminate v noise and sturdy internal bracing to minimise box control its easy to fine tune to your personal preferences and room acoustics The components and circuitry in the distinctive elliptical cabinet are all of audiophile standard and a separate infrared sensor allow
10. HF x 19mm GY SHF x 19mm 60Hz 55kHz 3kHz 5kHz 15 120W 89dB 109dB 8Q 3 20 min Yes 9 2kg 20 2Ibs 201 four way reflex LF 1 x 165mm 64 MF x 165mm 64 HF x 25mm 1 SHF x 19mm GY 58Hz 55kHz 400Hz 2 7kHz 5kHz 50 150W 88dB 10dB 8Q 2 20 min Yes 14 8Kg 32 6lbs 557 x 248 x 402 mm 21 9 x 9 8 x 15 5 in Black Ash Maple or Cherry real wood veneer 374 418 x 231 x 302 308 mm 14 7 16 4 x 9 x 11 9 12 1 in Graphite Silver or Maranello Red Q5 two and a half way bass reflex LF 165mm 6 MF 165mm 6 HF x 19mm GY 39Hz 27kHz 2 8kHz 15 150W 9106 11206 80 Yes 14 5kg 32Ibs 880 x 240 x 320 mm 34 6 x 9 4 x 12 6 in Black Ash Maple Dark Apple or Silver Q4 three way bass reflex LF 130mm 54 MF 130mm 5 42Hz 27kHz 250Hz 2 8kHz 15 150W 90dB I IdB BU Yes 9 9kg 20 0lbs 855 x 180 x 250 mm 33 7 x 7 1 x 10 8 in Black Ash Maple Dark Apple or Silver PSW3500 closed box downward firing 300mm 12 30Hz 250Hz variable LFE 300W built in 10dB Yes 22 5kg 49 6lbs 450 x 600 x 395 mm 17 7 x 23 6 x 15 6 in Black Ash Maple Dark Apple or Silver Q 6c two way bass reflex LF 130mm 5 HF x 19mm 50Hz 27kHz 2 8kHz 10 100W 89dB 109dB 80 Yes 4 kg 9lbs 165 x 434 x 215 mm 6 5 x 17 1 x 8 5 in Black Ash Maple Dark Apple or Silver
11. Q9c The Q9c centre speaker has the same Uni Q array for a perfect timbre match with the rest of the Q Series Magnetically shielded and bi wirable it has the power to enrich your viewing experience compared to any conventionally engineered equivalent A 130mm die cast chassis houses the long throw cone and coincident mounted 19mm aluminium dome HF unit for true point source reproduction Combine the excellent offaxis dispersion characteristics of Uni Q with the magnetic shielding of the drive Q6c By utilizing an identical Uni Q array in the Q c centre channel an even tonal balance is obtained throughout the soundstage when combined with other models in the range Configured for bi wiring as are all the new Q Series products or even bi amplification the Q6c has the power and presence to bring your home theatre to life Q2ds The new Q2ds dipole surrounds create the perfect diffuse surround effect as experienced in movie theatres by utilising two 165mm 6 2 Uni Q arrays The addition of a downward firing reflex loaded 130mm 5 4 bass driver adds weight to the surround effects Enveloping you in a rich and spacious soundfield Providing you with the perfect home theatre experience Q8s Slim and compact Q8s is the two way closed box rear effects speaker for the Q Series range Using an identical Uni Q array to the rest of the range it reproduces diffuse ambient effects with great acc
12. ay is completed by audiophile quality 165mm 6 bass drivers on either side with ultra low distortion motor systems and reinforced lightweight diaphragms to recreate the full weight of frontal effects without sacrificing subtlety at lower volumes The perfect compliment to models 207 and 205 floor standers model 204c is one of the most impressive centre speakers to be found at any price or as one critic put it gobsmacking Model 202c The recommended centre speaker to partner models 203 and 201 the 202c delivers all the listening benefits of the latest Reference series technology With the same Hypertweeter and an identical Uni Q array incorporating KEF s latest elliptical dome titanium tweeter and seamless Uni Form cone surround the all important vocals are reproduced with the same stunning realism As with the 204c Uni Q s single point source effect really comes into its own in the 202c Pinpointing screen dialogue with great accuracy within the sound stage and when flanked by a pair of KEFs 165mm 6 ultra low distortion bass drivers the combined effect is to immerse the viewer in a detailed soundscape that s as lucid as it is involving Irresistible Q series The look of XQ an evolution of the new Reference Series aesthetic is about function not fashion From the chromed steel Hypertweeter pod to the curves of the cabinet everything is calculated to produce a cleaner purer sound Admitte
13. bracing system the new curved section cabinets are elegantly profiled to minimise colouration and finished in a choice of hand matched hardwood veneers More than ever before these are very special speakers indeed Model 207 A true five way design the 207 is instantly recognisable by the cast aluminium pod which is shaped to damp the internal sound field of KEF s new generation Uni Q upper midrange driver Beneath the state of the art elliptical profile titanium Hypertweeter a bonded Uni Form cone surround provides the optimum waveguide for the 25mm 1 titanium dome HF unit leading to exceptional vocal clarity The lower midrange driver is derived from the LF assembly allowing it to be effectively decoupled from the cabinet to improve imaging and integration while minimising colouration Both long throw 250mm 10 bass drivers have their own dedicated enclosures tuned to different frequencies for better performance in real rooms With a combined cone area equivalent to a single 375mm 15 cone they deliver staggering bass extension of exceptional purity Incredibly lucid over an expansive sound stage with no discernible distortion whatever sounds unit KEF s lightweight neodymium magnet Model 205 In all the other Reference Series models the wide dispersion Uni Q Hypertweeter pod is faired into the cabinet itself As in the 207 advanced computer modelling techniques were used to optimise the
14. ch the Reference Series is a quantum leap forward in audiophile quality sound In fact its performance envelope extends well beyond the range of human hearing This is not as futile as it may at first sound whereas conventional CDs carry no audio information beyond 20kHz extended bandwidth formats such as SACD and DVD Audio contain signals up to 40kHz and more Consider the analogy that even though no one drives at 200 mph cars that are engineered to do so are inherently better performers at lower speeds That s why all new Reference series models come with a state of the art 19mm titanium dome Hypertweeter for massively extended HF performance Mounted in low diffraction chrome plated steel enclosures time aligned with the main array they deliver flat response to 55kHz and useful energy up to 80kHz What you hear is a sweeter more natural sound Radical new Uni Q driver arrays the ultimate refinement of KEF s trademark technology where the tweeter is mounted at the acoustic centre of the midrange cone provide an immaculate single point source the Holy Grail of loudspeaker design With the midrange cone and surround integrated into a single Uni Form moulding there are no discontinuities to distort the HF energy from the 25mm 151 elliptical profile titanium dome tweeter With only midrange frequencies to handle movement of the Uni Q cone is so modest that virtually no distortion is caused by intermo
15. dly the finish is a bit of an extravagance You can specify your XQ system in either a cool Natural Maple veneer or one of three high gloss lacquer finishes Silver and Graphite Metallic to complement AV equipment or Maranello Red The aluminium front baffles are anodised in Silver XQ five Tall slim and assertive XQ five is a genuine four way floorstander with two 165mm 6 2 bass drivers in addition to the 165mm 6 2 midrange HF Uni Q array and KEF s new titanium dome Hypertweeter What you experience is a big all enveloping sound image XQ one Irresistible the compact three way stand mount speaker that s packed with Reference Series technology Dont be fooled by the relatively small size Power handling is exceptional and Uni Q s inherent wide dispersion characteristics fill any normal room with an expansive soundscape Magnetically shielded like the rest of the range it s equally at home shelf mounted or on the available dedicated stand If you re after true audiophile quality wideband response without breaking the bank this is the one But hey when the technology inside creates such beautiful sound they deserve to look special With all models magnetically shielded and identically voiced the XQ Series fills the room with the kind of breathtaking auditorium quality 3D soundscape you normally only find with the world s most expensive speakers perfectly controlled Exquisite detail wherever
16. dulation with the tweeter Like the bass drivers an open chassis design minimises acoustic reflection behind the cone The result is an even more spacious better defined sound stage over a very large area with exceptional off axis response and none of the sweet spot limitations of conventional speakers Bass extension is equally stunning thanks to ultra low distortion motor systems and high tech reinforced diaphragms And with each bass driver radiating directly from its own separate internal enclosure to avoid the distorting effects of vertical standing waves that tall cabinets usually suffer from you experience noticeably clearer more open bass As you would expect from a handmade KEF product build quality is as outstanding as the specification of each individual component Carefully graded and soldered by hand KEF s own oxygen free copper cable ensures the best possible signal transmission with terminals machined from solid brass and plated in gold High order crossovers with advanced air cored inductors and polypropylene capacitors ensure faultlessly smooth integration For optimum performance in real rooms all models accommodate tri wiring and are fitted with a boundary control device to adjust bass response according to speaker positioning and the acoustics of the listening area Magnetic shielding ensures trouble free positioning in home theatre applications Engineered from laminated birch ply using KEF s own internal
17. esigned crossovers optimise sound quality and KEF s internal bracing eliminates the box resonances that often affect tall full size speakers The result is clean sweet and devastatingly accurate sound quality Uni Q pod and curved section cabinets echoes the latest Reference series Every model features a new design of Uni Q driver array whose 19mm metal dome tweeter is a direct development from the Reference HF unit and the same ultra low distortion motor system Assertive musically voiced and richly satisfying the new Q series speakers are available in a choice of Maple Dark Apple Black Ash or Silver finishes Q5 A full bandwidth floorstander with Uni Q s characteristically wide dispersion area Q5 plays loud and true The response of the midrange HF array is fluid and accurate and the 165mm 6 2 bass driver has its own tuned enclosure and reflex port for more dynamic power handling Wherever you sit the configuration adds depth and texture to the stereo image Whether you opt for the Maple Dark Apple or Black Ash finish Q5 looks discreet and authoritative and that s how it sounds QI All the benefits of the latest Q Series in a compact speaker with the power to fill the room with big sounds It has the same Uni Q driver array as the floorstanding models reproducing the frequency spectrum with virtually no crossover effects Genuine performance and great value
18. icate delicacy right across the frequency range throw is critical but the lower unit is rolled off early to allow the top LF Stereo imaging is superb the detailing immaculate and the response so fluid you driver to dominate at the crossover to the midrange unit for the smoothest could almost drink it possible integration The listening experience is spine tingling off axis as well as on Wherever you sit in the room there s a near perfect illusion of presence exactly what you want for auditorium quality home theatre or to recapture that elusive live concert feel Model 201 All the latest Reference Series technology packed into a neat bookshelf package The same sophisticated elliptical titanium dome Hypertweeter The same carefully damped cast aluminium enclosure for the 5th generation Uni Q driver with its thermoplastic rubber surround moulded on to the cone to avoid the slightest acoustic discontinuity The same ultra low distortion LF motor systems for bass power with un compromised accuracy There s certainly no compromise on build quality either Graded and hand soldered OFC wiring Audiophile crossovers with air cored inductors and polypropylene capacitors Gold plated terminals Like all Reference Series models the 201 can be tri wired and comes with a boundary control device to fine tune response to the acoustics of the room And with full magnetic shielding and the inherently wide dispersion character
19. istics of KEF Uni Q you can place them more or less wherever you like Smooth Sweet sounding Startlingly clear The 201 is big in everything but size Model 206DS Designed to partner the new Reference Series the Model 206DS is a dedicated dipole rear surround for no nonsense KEF Reference multi channel systems Incorporating two of the radical new Uni Q point source arrays as used in the Reference Series partnered with two 9mm _ 3 4 titanium dome Hypertweeters and twin l65mm 6 2 low distortion bass drivers the Model 206DS is perfectly timbre matched to the other Reference Series speakers The four way Model 206DS contains the technologies developed for the Reference Series a Boundary Compensation Device Reference matched drive units The technologies combine to produce an incredibly lucid sound reproduction to ensure your enjoyment is complete Model 204c With around two thirds of the average movie soundtrack playing through the centre channel KEF s extended bandwidth technology has been applied with particular care to the new Reference series centre speakers Adding the Hypertweeter to the new Uni Q driver array provides the extra bandwidth required to reproduce all the audio information encoded in the latest digital formats For reproducing the human voice the combination is unsurpassed completely natural sounding and sensitive enough for the slightest whisper to be heard with unerring clarity The arr
20. n and bi amping in which each set of connectors is wired to a separate amplifier for optimum response across the frequency range KEF s new Reference Series even features 3 pairs of connectors for tri wiring or tri amping Most speakers sound better after a few hours use All you have to do then is sit back and enjoy Imaging Stereo imaging is the illusion of a realistic 3D presence that seems not to come from the speakers themselves but a virtual sound stage in which different instruments or sound effects are localised With conventional speakers as opposed to KEF Uni Q this illusion only occurs in a relatively small area the sweet spot To test speaker dispersion characteristics move around the listening area Does the sound fade as you move away from the main axis of the speaker Do central images stay centrally located at some frequencies but not others R FREFERENCE SERIES The continuing evolution of KEF s legendary Reference Series has always been based on the concept of benchmark precision Every time a new generation of models is developed to incorporate more sophisticated technologies we build i prototypes that are as close to perfection as possible q 9 These then become the Reference to which every single production version must conform each set assembled by a skilled craftsman who matches their performance to a tolerance of just 0 5dB As the latest incarnation of this approa
21. ong throw drivers allow a large amount of cone movement and therefore generate higher sound pressure levels A strong chassis such as cast aluminium provides a rigid platform for the moving coil cone assembly and avoids the energy being drained from the cone into the cabinet itself Some form of mechanical decoupling between the chassis and the cabinet can greatly reduce the transmission of this vibrational energy to the cabinet walls Cone materials vary Tweeters are usually made from metallic or fabric materials the former tend to be very revealing and detailed the latter a more reserved sound your kind of music or film soundtrack in your room at the volume you most enjoy Although technical specifications are helpful you can only find which model best suits your personal preferences by hearing them in action These are some of the things you should be looking for Components Crossovers act as the brains of a speaker allocating the various frequency ranges to the appropriate drivers with filters to stabilise impedance loads and shape frequency response The quality of the components such as polypropylene capacitors and air cored inductors directly affects acoustic fidelity Setting up High performance speakers usually have dual sets of connectors binding posts and crossovers with separate sections for low and high frequencies This is to accommodate bi wiring using two sets of cables to improve resolutio
22. quency Amplifier requirements Sensitivity 2 83V Im Maximum output Impedance Magnetic shielding Weight Dimensions HxWxD Finishes 207 five way reflex LF 2 x 250mm 10 LMF x 250mm 10 MF x 165mm 64 HF x 25mm 1 SHF x 19mm 40Hz 55kHz 120Hz 400Hz 2 7kHz 5kHz 50 400W 91dB 17dB 8Q 2 20 min Yes 66Kg 145lbs 1266 x 400 x 685 mm 49 8 x 15 7 x 27 in Black Ash Maple or Cherry real wood veneer XQ five four way bass reflex LF 2 x 165mm 6 MF x 165mm 64 HF x 19mm 7 SHF x 19mm Y 45Hz 55kHz 300Hz 3kHz 15kHz 15 150W 90dB 12dB 8Q 3 20 min Yes 24 3kg 53 5 bs 205 four way reflex LF 2 x 200mm 8 MF x 165mm 64 HF x 25mm 1 SHF x 19mm 45Hz 55kHz 400Hz 2 7kHz 5kHz 50 300W 90dB 15dB 8Q 3 20 min Yes 33Kg 72 6lbs 1155 x 285 x 433 mm 45 5 x 11 2 x I7 in Black Ash Maple or Cherry real wood veneer 101I 1055 x 231 x 302 311 mm 39 8 41 5 x 9 x 11 9 12 2 in Graphite Silver or Maranello Red Tincluding grilles and Hypertweeter Q7 three way bass reflex LF 228 x 152mm 9 x 6 MF 165mm 6 HF x 19mm GY 35Hz 27kHz 120 2 8Hz 15 175W 91dB 13dB 80 Yes 7kg 37 4lbs 950 x 260 x 350 mm 37 4 x 10 2 x 13 7 in Black Ash Maple Dark Apple or Silver Q8s two way closed box LF 165mm 6 HF x 19mm GY
23. s of loudspeaker engineering and none is better placed to exploit the potential of the latest digital formats KEF Production Facility at Maidstone to do this the Model 105 This technology lives on today in the Model 207 flagship Model 107 2 1990 96 Model 207 2001 KEF LOUDSPEAKERS What to look for when choosing your speakers Of all the elements in your audio system changing your speakers can make the biggest difference in sound quality As a rule of thumb the speakers in a basic two channel hi fi system often account for about a third of the total system cost Speaker quality has a lot to do with size and the number of drive units but ultimately what matters is how well they reproduce Measuring performance The smoother a speakers frequency response the more faithful its reproduction of the audio signal Transient response is also important reflecting the speaker s ability to respond quickly to any sudden change in the signal without blurring smearing the sound How loudly a speaker plays depends on its sensitivity maximum output capability and power handling Low sensitivity speakers require larger amounts of amplifier power to reach a given loudness level High sensitivity speakers require relatively less and on can be used to compensate for low amplifier power w When compensating for low sensitivity speakers remember that a l0dB increase in sound pressure level which sounds twice as loud requires 10 times more
24. s the unit to be placed completely out of sight Available in Black Ash Maple Dark Apple or Silver heavily braced to eliminate any unwanted box colouration Using a 250mm 10 long throw bass driver and a 250W built in amplifier this closed box design will deliver ground shaking effects and depth whether it is a movie or music The PSW2500 also incorporates many new features such as ground lift ability and switchable movie music modes allowing it to complement any music or multi channel system colouration the cabinets distinctive soft edged styling is set off by a choice of Black Ash Maple or Dark Apple finishes The ideal entry level sub SPECIFICATIONS Reference Series Model Design Drive units Frequency response at 3dB Crossover frequency Amplifier requirements Sensitivity 2 83V m Maximum output Impedance Magnetic shielding Weight Dimensions H xW x D Finishes XQ Series Model Design Drive units Frequency response at 3dB Crossover frequency Amplifier requirements Sensitivity 2 83V m Maximum output Impedance Magnetic shielding Weight Dimensions H xW x D Finishes Q Series Model Design Drive units Frequency response 3dB Crossover frequency Amplifier requirements Sensitivity 2 83V 1m Maximum output Impedance Magnetic shielding Weight Dimensions HxWxD Finishes Model Design Drive units Frequency response 3dB Crossover fre
25. uracy Full magnetic shielding prevents any interference with nearby electronics and they can be either wall or shelf mounted units and you get a speaker which is much easier to place in the room and one which alleviates the traditional sweet spot found with ordinary speakers The new Q4 is a true three way speaker with extended bass output which belies the size of its diminutive cabinet Q compact The new Q compact brings unrivalled performance to a small bookshelf loudspeaker by making the outstanding attributes of Uni Q available at an affordable price Compact in all but performance POWERED SUBWOOFERS The Powered Subwoofer PSW plays a vital part in exploiting the full potential of DVD and other digital formats The KEF range offers logical steps in amplifier power and bass performance with PSW5000 The ultimate powered subwoofer as it would have to be in order to match the awesome performance standards set by the new Reference Series for which it was designed How does a IkW Class D amplifier with a 380mm 15 long throw woofer sound Simply devastating is the answer The subwoofer can be adjusted via radio remote control from anywhere in the home so the unit can be concealed wherever you please From the furniture quality real wood enclosure in Black Ash Maple or Cherry to the tips of its gold plated terminal block PSVWW5000 exudes performance without compromise PSW3500 PSW2500 With a 3
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