3000 Series Brochure KEF HTB2 KHT3000
User Manual: KEF HTB2
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K1271_3000 series brochure 10/1/11 11:56 Page 1 www.kef.com GP Acoustics (UK) Ltd, Eccleston Road, Tovil, Maidstone, Kent, ME15 6QP U.K. Telephone: + 44 (0)1622 672261 Fax: + 44 (0)1622 750653 KEF A merica Inc, 10 Timber Lane, Marlboro, New Jersey 07746 U.S.A. Telephone: +(1) 732 683 2356 Fax: +(1) 732 683 2358 GP Acoustics GmbH, Heinrichstraße 51, D-44536 Lünen, Deutschland. Telephone: +49 (0) 231 9860-320. Fax: +49 (0) 231 9860-330 GP Acoustics (France) SAS, 39 Rue des Granges Galand - BP414, 37554 Saint Avertin CEDEX, France. Tel : +33(0)2 47 80 49 01 Fax : +33(0)2 47 27 89 64 KEF and Uni-Q are registered trademarks. Uni-Q is protected under GB patent 2 236929, U.S. Pat. No. 5,548,657 and other worldwide patents. KEF reserve the right, in line with continuing research and development, to amend or change specifications. Dolby, Pro Logic, and the double-D symbol are registered trademarks of Dolby Laboratories. DTS is a registered trademark of Digital Theatre Systems Inc. www.kef.com PL1627EN K1271_3000 series brochure 10/1/11 11:56 Page 3 KEF home theatre 3000 series A quest for perfection… The secret of KEF home theatre When you've been innovating for nearly 50 years, staying ahead of the game becomes second KEF’s patented ‘sit anywhere’ Uni-Q® driver configuration, places the tweeter in the acoustic centre nature. So as soon as the digital home entertainment revolution kicked off, of the bass/midrange cone. This creates a single focused audio source that disperses the sound we designed the KEF Home Theatre concept to sound, look and feel better image evenly throughout the room so that everyone enjoys the full richness of music or than anything else for the price. And the KEF KHT2005 (left) movie soundtracks. earned the awards and 5-star ratings to prove it. The Uni-Q array in the 3000 series has a completely new design which performs better than ever. Instead of having identical centre and satellite speakers like other systems, we've created a stunning new dedicated centre channel that gives dialogue more weight and clarity delivering cinema-like frontal impact. We've also added a radical new high performance powered subwoofer. But innovators don't stand still. We set about improving every single component to raise the bar in terms of freedom from distortion, power handling and optimising KEF's unique ‘sit anywhere’ point source sound dispersion technology. The 3000 series is the result, and it's much more than just an evolution from its award-winning predecessors - it's a revolution. Smoother. Sweeter. More dynamic. As a system, it certainly puts the 'live' into living room. K1271_3000 series brochure 10/1/11 11:56 Page 5 K1271_3000 series brochure 10/1/11 11:56 Page 7 Satellite Speakers Clearly an evolution - in styling terms - of the signature egg shape, the 3000 series is a completely new design that looks better and sounds sweeter than anything else in its class. The new 115mm (4.5in.) Uni-Q driver of the HTS3001 satellite speaker has been comprehensively engineered for even cleaner, smoother response. An improved magnet system delivers even heftier bass by allowing greater movement of the speaker cone. KEF’s all-new sealed suspension technology (SST)TM fills in the gap between midrange cone and tweeter to produce a markedly more powerful, cleaner sound. Distinctive radial ribs on the midrange cone improve its rigidity for pure, clean vocal effects with exceptionally low distortion. The cast aluminium enclosures are shaped to minimise internal resonance so that the satellites fill the room with a lush and incredibly detailed 3D sound. The attention to detail is plain to see, from the depth of the gloss finish to the ingeniously simple wall mounting bracket system. Dynamic. Perfectly balanced. Seamlessly integrated. K1271_3000 series brochure 10/1/11 11:56 Page 9 K1271_3000 series brochure 10/1/11 11:56 Page 11 Centre Speaker Carrying up to 60% of the sound, the centre channel is vital in any home theatre system, and the new dedicated centre speaker of the 3000 Series is in a class of its own. With the same new generation 115mm (4.5in.) Uni-Q array as the satellites, flanked by two additional 75mm (3in.) bass drivers, the hefty frontal impact is complemented by amazingly clear dialogue. And the response is so superbly integrated across the frequency range that you soon forget you’re listening to a recorded signal. It sounds astonishingly true to life. K1271_3000 series brochure 10/1/11 11:56 Page 13 K1271_3000 series brochure 10/1/11 11:56 Page 15 Subwoofer It’s the first subwoofer at this price level that you won’t want to hide away out of sight. With an ultra-reliable, high efficiency, 250W class D amplifier powering a 250mm (10in.) driver with a matching auxiliary bass radiator, the radical HTB2 model subwoofer anchors the 3D sound image with stunningly realistic low vertically or frequency reproduction. Whether you prefer to position it horizontally, the story’s the same: an acoustically inert enclosure shaped to eliminate internal standing waves, extremely ‘connect simple fast and bass phase controls. response go’ and versatility boost and SmartBass TM with K1271_3000 series brochure 10/1/11 11:56 Page 17 Satellite and Centre Technology ‘Sit anywhere’ Uni-Q Technology Sealed Suspension Technology KEF's patented Uni-Q driver configuration The all-new Uni-Q driver array of the 3000 uses aerospace technology to mount the series has been comprehensively engineered tweeter in the acoustic centre of the cone as a single focused source that disperses thanks to radial reinforcing ribs for more the ‘piston-like’ image evenly throughout the now produces smoother behaviour 1, and its for) sound surround has been re-profiled to deliver sound wherever you sit. superior bass extension. new Sealed dramatically quality Suspension at improves higher volumes Grilles sound The grilles on the centre and satellite as it speakers are held in position by magnets, effectively seals the gap between giving a high quality, tactile feel, and because the moving mid-range cone and tweeter it’s a closed loop magnet system, they won’t (see diagram above). interfere with your TV or any other nearby rubber room, so you experience the same 3D unique Technology – SSTTM (patent applied for even cleaner response. The midrange bass/midrange cone. This allows both to act sound KEF’s electronic equipment. The images on the left show scans from KEF’s Laser Doppler Vibrometer2 illustrating how speaker cones deform in normal operation. The difference is plain to see, Typical loudspeaker cone KEF home theatre 3000 series cone the KEF 3000 series suffers less break-up important design is the element ability of to design wasn’t easy. We had to make a Very KEF - a typically ingenious touch. rubber seal that was light enough to move with a speaker without affecting the sound, it’s a genuine innovation.” KEF Research Engineer, Jack Oclee-Brown. and hence produces cleaner sound. An “Improving upon the already near perfect loudspeaker produce sound which is as close as possible to the original source. that Distortion impacts upon is the the main quality factor of the sound reproduced. Stands The standard elliptical shelf A distortion level of below 2% for a stands, supplied with each Finishes loudspeaker is considered to be excellent. satellite and centre speaker, The KEF 3000 series performs within a double up as unobtrusive wall When 0.3-0.8% band, considerably better than brackets, and allow your sound, you want your system to look the this benchmark. See the distortion chart3 satellites to be stably part. The 3000 series comes in a choice of left, oriented of which the KEF shows 3000 the measurements series (green in any direction. High you're Gloss Black or audiophile High quality Gloss Silver finishes; whichever you choose, you'll find line) elegantly simple that the surface against its predecessor, the award winning The KHT2005.2 series (red line). optional matt finished floor distinctively stands (right) complement enclosures. 1 A piston-like motion of a speaker cone, with less deformation and break-up produces cleaner, less distorted sound. 2 The KEF Laser Doppler Vibrometer is a scanning laser device that measures the precise diffraction of light from a moving device (in this case the midrange speaker cone). Using this technique very small vibrations, normally invisible to the naked eye, can be recorded, amplified and then viewed on a computer. (Measurement taken at 1500Hz). 3 Distortion measured at 90dB. buying reflections smooth echo contours of the the the satellite speakers in both form and function. If you think the look makes a statement, wait till you hear the sound. K1271_3000 series brochure 10/1/11 11:56 Page 19 Subwoofer Technology Specifications Subwoofer Drive Unit Auxiliary Bass Radiator (ABR) Model HTS3001 Satellite HTC3001 Centre HTB2 Subwoofer Design Bass reflex two-way Closed box three-way Heavy weight long-throw motor design with Balanced, Powered Subwoofer Passive radiator aluminium design Drive Unit Array 115mm (4.5in.) Uni-Q 19mm (0.75in.) aluminium HF 115mm (4.5in.) Uni-Q 19mm (0.75in.) aluminium HF 2 x 75mm (3in.) LF 1 x 250mm (10in.) 1 x 250mm (10in.) ABR Frequency Range 70Hz - 55kHz 65Hz - 55kHz 30Hz - 250Hz Amplifier Requirement 10 - 100 Watts 10 - 100 Watts 250 Watts built in Sensitivity (2.83V/1m) 88dB 90dB n/a Maximum Output 108dB SPL @ 1m 110dB SPL @ 1m 110dB SPL @ 1m Impedance 8Ω 8Ω n/a Internal Volume 1.75 litres 2.4 litres 15 litres Weight 2kg (4.5lbs) 2.6kg (5.8lbs) 11.3kg (24.9lbs) Dimensions (H x W x D) 245 x 125 x 150 mm 9.6 x 4.9 x 5.9 in. 130 x 300 x 185 mm 5.1 x 11.8 x 7.3 in. vertical: 390 x 440 x 195 mm 15.4 x 17.3 x 7.7 in. Faraday ring for reduced for symmetrical, more low linear profile ABR excursion and distortion. reduced distortion. Magnetically shielded. Internally vented ABR air cavity resulting in less compliance damping giving better 4-layer copper coil for high power capacity. FEA 1 LF performance. optimised coil and magnet design to give a linear BL profile2. Rear suspension and surround are FEA optimised to give maximum linear excursion, resulting in reduced distortion. horizontal: 227 x 440 x 385 mm 8.9 x 17.3 x 15.2 in. Electronics Highly efficient 250W class amplifier. D Sophisticated prevent limiter voltage optimised Thermal and overcurrent protection built amp power and into for system to Finish High Gloss Black or High Gloss Silver High Gloss Black or High Gloss Silver Dispersion Over 90º arc with 2dB reference, both horizontal and vertical Over 90º arc with 2dB reference, both horizontal and vertical Harmonic Distortion 2nd and 3rd harmonics (90dB, 1m) <0.8% 120Hz - 30kHz <0.3% 250Hz - 22kHz 2nd and 3rd harmonics (90dB, 1m) <0.8% 120Hz - 30kHz <0.3% 250Hz - 22kHz Crossover Frequency 2.2kHz 500Hz / 2.2kHz High Gloss Black or High Gloss Silver overload, maximum audio quality3. the supply unit ensuring ultra reliable performance. Power Requirements 1 FEA = Finite Element Analysis - a design process where individual elements are computer modelled. 2 BL profile = measurement of the motor force factor on the speaker driver over the working displacement of the magnetic coil. 3 Opto-coupled LED and light sensitive resistor senses overdrive and automatically limits this to prevent damage to the unit. 100 - 240V ac 50 - 60Hz Items are available separately, or packaged as a complete system. GP Acoustics (UK) Ltd. reserve the right, in line with continuous research and development, to amend or change specifications without prior notice. E. & O.E.
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