KEF Reference 204/2c manual

OWNERS MANU A L Model 201/2 Model 202/2c Model 203/2 Model 204/2c Model 205/2 Model 206/2ds Model 207/2 Thank you f or purchasing KEF Ref erence Series loudspeak ers. These ha ve been designed to faithfully r eproduce high quality sound o ver many years of use and should pr ovide realistic repr oduction of music and speech. Please tak e a little ti[...]

2 3 Impor tant Saf ety Information 1 General Car e of Y our System 1 Contents 3 Intr oduction 5 Overview of Common Featur es 6 Model 207/2 7 Model 205/2 7 Model 203/2 7 Model 201/2 8 Model 206/2ds 8 Model 202/2c 8 Model 204/2c 8 Installation and Operation 9 Unpacking, Handling and Aftercar e 9 Adjusting the Feet and/or Spik es 10 Loudspeak er Place[...]

5 Since its formation in 1961, KEF has pioneer ed many inno vations in loudspeak er technolog y and design. Y our new Refer ence Series loudspeakers contain one of the latest of these advances - the KEF ‘Project Austin’ Uni-Q driv er arra y . In this innovativ e KEF design, not only ar e the mid and high-frequency driv ers on the same axis (co-[...]

6 7 Four driv e units in a three-wa y configuration are employ ed in the Model 205/2. The single Uni-Q driver ar ra y for upper mid-range and high frequencies with ultrasonic extension, and a pair of 200mm (8in.) drive units in IDL configuration for low fr equencies. This system works optimally in medium to large rooms wher e its controlled and ext[...]

9 8 These Refer ence Series loudspeak ers are pack ed one loudspeak er per car ton. Prior to unpacking, please ensure that the serial n umbers of the loudspeak ers supplied match each other . Then, unpack the loudspeak ers carefully and inspect for an y sign of damage . Y our loudspeak ers left KEF in perfect condition. If any damage is a pparent, [...]

11 10 Under normal circumstances y our loudspeakers will be commissioned by y our retailer or consultant, who will ha ve been trained in their installation by KEF . KEF strongl y recommend that you do not attempt to lev el your loudspeak ers single-handed. Recruit the assistance of another adult - or consult an authorised KEF Refer ence outlet for [...]

13 12 2m (6' 8") 2m (6' 8") Loudspeak er P ositioning[...]

14 15 All connections should be made with the amplifier switched OFF . Ensure the integrity of all connections prior to switching the amplifier ON. KEF Refer ence Series loudspeak ers are fitted with purpose designed gold-plated T ri-wire/T ri-amp terminals which will accept bare wir e , spade or 4mm connectors. Most good quality loudspeak er cable[...]

17 16 HF Adjustment The ‘HF Adjust’ A and B terminals control the high frequency output of the loudspeak er . This facility allows the user to adjust the ‘brightness’ of the loudspeak er to suit listening room acoustics, partnering electr onics and personal taste. Four settings for tw eeter output level ar e possible +0.75, 0 (‘flat’), [...]

T ri-wiring/T ri-amping T erminals The three sets of input terminals ar e linked by a high quality shorting cable . Removal of this cable will allow the LF , MF and HF sections to be connected separately , either by a parallel connection from one amplifier (kno wn as tri-wiring) or to separate pow er amplifiers driven fr om the same pre-amplifier ([...]

21 20 x4 x2 Centre loudspeak er single wire connections Centre loudspeak er bi-wire connections Centre loudspeak er tri-wire connections x8 x4 Loudspeak er bi-amplification connections Loudspeak er tri-amplification connections Loudspeak er single amplification connections[...]

23 22 x4 x2 Centre loudspeak er single amplification connections Centre loudspeak er bi-amplification connections Centre loudspeak er tri-amplification connections Poor quality cables can seriousl y compromise the ov erall sound of your hi-fi system. KEF recommends that high quality loudspeak er cable be used for connecting y our Reference Series l[...]

25 24 Specifications Design : Bass reflex f our -way floorstanding loudspeak er , magnetically shielded. Drive Unit Ar ray : 2 x 250mm (10in.) LF 1 x 250mm (10in) LMF 1 x 165mm (6.5in.) Uni-Q MF including a 25mm (1in.) titanium HF Fr equency Response : (@ 15° horizontally off axis ± 3dB) 40Hz - 60kHz Cr osso ver F requencies : 120Hz, 350Hz, 2.3kH[...]

27 26 Design : Closed box thr ee-way dipole loudspeak er , magnetically shielded. Drive Unit Ar ray : 1 x 200mm (8in.) LF 2 x 165mm (6.5in.) Uni-Q MF including 2 x 25mm (1in.) titanium HF Fr equency Response : (@ 15° horizontally off axis ± 3dB) 65Hz - 60kHz Cr osso ver F requencies : 250Hz, 2.3kHz Amplifier Requirements : 50 - 200W Sensitivity :[...]

29 KEF was founded in 1961 by an electrical engineer named Ra ymond Cooke in a Nissen Hut on the premises of a metal working operation called K ent Engineering & Foundry (hence KEF), on the banks of the River Medwa y , near Maidstone in K ent. From the beginning KEF was destined to become a company with a flair f or the unusual and contro versi[...]

31 30 By 1973 the company was de veloping the concept of computer assisted ‘T otal System’ design, at a time when the world’ s v er y first 4-bit micropr ocessor was still in its infancy . KEF engineers, using a given set of parameters, could for the first time actually “see” what the response characteristics of a loudspeak er system woul[...]

33 KEF’ s acclaimed Reference Series Under new ownership in 1992 KEF Audio f ound itself equipped with new ideas, ne w personalities and new pr oducts. But the same philosophies of solid engineering and innovation to pr ovide the finest quality product a vailable at its particular price-point remained firml y at the bed-rock. In 1994 and 1995 the[...]

35 The millennium ushered in a ne w era of groundbr eaking audio innovation. Among the most important was the launch of a new Refer ence Series - the forerunner of toda y’ s design - in 2002. This redefined the benchmark for high-end loudspeak ers by incorporating signature KEF technologies such as Uni-Q and the ‘pod’ concept. The decade had [...]

GP Acoustics (UK) Ltd., Eccleston Road, T ovil, Maidstone , K ent, ME15 6QP U.K. T elephone: + 44 (0)1622 672261 Fax: + 44 (0)1622 750653 GP Acoustics (US), Inc., 10 Timber Lane , Marlbor o, Ne w Jersey 07746 U.S.A. T elephone: +(1) 732 683 2356 Fax: +(1) 732 683 2358 GP Acoustics GmbH, Heinrichstraße 51, D-44536 Lünen, Deutschland. T elephone: +[...]