KEF Audio 208 manual

K7262_Cover for Combined Manual 12/2/08 12:48 Page 1[...]

1 NO TE: This equipment has been tested and found to comply with the limits f or a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to pro vide reasonable pr otection against harmful interfer ence in a residential installation. This equipment generates, uses and can radiate radio fr equency energy and, if not [...]

2 3 Please tak e heed of the follo wing before using the KEF Refer ence Series Subwoofer . Note also that the wor d “appliance” shall r efer to the KEF Refer ence Series Model 209/ Model 208 Subwoof er , or any part of it. 1. Read Instructions - All the Safety and Operating Instructions should be r ead befor e the appliance is operated. 2. Reta[...]

5 4 Corr ect Wrong Adjustment Caution/W arning Electrical W arning Positiv e/RED Negative/BLA CK Switch off appliance Option Read 1. A void temperatur e extremes. 2. A void damp . 3. A void dir ect sunlight. 4. Clean with the KEF cloth pr o vided. 5. Do not use spirit based cleaners. If y ou are at all uncertain about setting up , operating or cari[...]

7 Intr oduction Intr oduction and Ov er vie w The KEF Refer ence Series 209 subwoof er is a ‘state of the art’ subwoofer for use in the v er y best home theatre and ster eo systems. Ever y component is critically designed to giv e optimum acoustic performance in a compact, elegant enclosur e. The k ey components in the 209 subw oofer ar e the d[...]

9 8 A CE technology The la ws of ph ysics dictate that to get good bass extension out of a loudspeak er you need a large enclosure v olume , and to get high output levels y ou need to mov e a lot of air . This is wh y the more expensive loudspeak er systems hav e large or multiple bass driv ers and big enclosures. Many potential solutions to the en[...]

11 Unpacking, Handling and After car e Installation and Operation 10 loudspeak ers. The care pack also contains the unique product build certificate. This is a valuable document and guarantees the quality and craftsmanship of your subw oofer . The cabinet is finished in real w ood veneer and should be treated with the same car e with which you w ou[...]

13 12 Adjusting the F eet and/or Spikes Under normal circumstances y our subwoofer will be commissioned by y our retailer or consultant, who will ha ve been trained in their installation b y KEF . KEF strongl y recommend that y ou do not attempt to lev el your loudspeak ers single-handed. Recruit the assistance of another adult - or consult an auth[...]

14 15 Rear P anel Information Mains po wer sock et and fuse holder . Please check that the voltage indicated is cor rect for y our countr y’ s mains supply voltage as this subwoof er comes in 110V or 240V versions that are not inter -changeable. Please return to your KEF retailer if the setting is incor rect f or the voltage suppl y in your count[...]

17 16 Remote Contr ol and Contr ol Functionality Po w e r. Puts the Refer ence Series 209 subwoof er into or out of standby . Auto/Manual. Switches the Refer ence Series 209 subwoof er between automatic mode or man ual mode. In automatic mode the subwoof er will go into standby automatically after a ppro ximately 30 minutes of silence. It will auto[...]

18 19 Connections, Setup and Fine T uning All connections should be made with the amplifier switched OFF . Ensure the integrity of all connections prior to switching the amplifier ON. L R L R L R L R Stereo line le vel connections Stereo speak er level connections L R C SUB LS RS L R C SUB LS RS LFE line lev el connections (For use with bass limite[...]

20 21 Combined mo vie and music setup. The Refer ence Series 209 subwoof er can be used for both main speak er low frequency extension and the LFE channel repr oduction for a surround sound system. Set the subwoof er up as described in section ‘Music Only Setup’. With the subw oofer corr ectly set up for ster eo use , connect the LFE output fro[...]

22 23 Using the Pr eset Equalization options Left and Right EQs and LFE EQs are pr e defined by KEF’ s acoustics engineers to allow easy selection of the most useful response adjustments. They can be independently selected enabling a differ ent EQ to be applied to the L+R inputs and the LFE line lev el input. EQ0 Standard (Default) EQ1 Bass Exten[...]

24 25 Specifications MODEL 209 Design : Closed Box, magnetically shielde d Drive Unit Ar ra y : 450mm (18in.) long-thro w bass driver with radial magnet system allowing +/-30mm of linear excursion. Fr equency Response : (± 3dB) 15Hz - 250Hz Amplifier : 1000W Class D with switched mode pow er supply and DSP based control section. Sensitivity : (2.8[...]

27 Intr oduction Intr oduction and Ov er vie w The subwoof er is the heart of any home theatre system, pro viding an exhilaration that brings the sound stage ph ysically to life. That is wh y the same lev el of attention and care has been tak en to develop the Refer ence Series Model 208 subwoof er as the rest of the Ref erence Series range. K ey c[...]

29 28 Unpacking, Handling and After car e Installation and Operation also contains the unique product build certificate. This is a valuable document and guarantees the quality and craftsmanship of your subw oofer . The cabinet is finished in real w ood veneer and should be treated with the same car e with which you w ould treat fine furniture. It i[...]

31 30 Adjusting the F eet Under normal circumstances y our subwoofer will be commissioned by y our retailer or consultant, who will ha ve been trained in their installation b y KEF . KEF strongl y recommend that y ou do not attempt to lev el your loudspeak ers single-handed. Recruit the assistance of another adult - or consult an authorised KEF Ref[...]

33 32 Rear P anel Information 110V or 240V V oltage Selection Switch. Please check that the voltage indicated is set corr ectly for y our countr y’ s mains supply voltage as this subwoof er comes with a 110V to 115V or 220V to 240V voltage s witch. On/Off switch. Please turn off your subw oofer during long periods of non-use. Speak er/high le vel[...]

35 34 Contr ol Functionality Phase. Adjusts the phase of the subwoof er output relativ e to your main speakers fr om 0 to 180 degrees in 5 degr ee steps. Le vel. This decreases or incr eases the subwoofers volume r elative to the main speakers. Slope. Switches the Low Pass Filter slope betw een 12 (shallow) and 24dB per octa ve (steep). This can be[...]

36 37 Connections, Setup and Fine T uning All connections should be made with the amplifier switched OFF . Ensure the integrity of all connections prior to switching the amplifier ON. L R L R L R L R Stereo line le vel connections Stereo speak er level connections L R C SUB LS RS L R C SUB LS RS LFE line lev el connections (For use with bass limite[...]

38 39 Mo vie only setup through the LFE input. This dedicated line lev el input is specifically for the LFE (Low Fr equency Effects) output fr om a surr ound sound A/V pr ocessor . Please note that single ended (phono) or balanced (XLR) connections are a vailable , how ev er , they must not be used simultaneously . The LFE input to the subwoof er w[...]

41 40 Grille A dedicated grille assembly is supplied with y our subwoof er . The grille is held on via ‘pegs’ that locate into the front baffle grille-peg sock ets. How ev er , if you wish, y ou may r emov e the grille by gently pulling it f orward towar d you. If requir ed, the grille may be r emov ed during use. KEF suggest the remo val of th[...]

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 versial [...]

By 1973 the company was de veloping the concept of computer assisted ‘T otal System’ design, at a time when the world’ s very 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 would be. KE[...]

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 co[...]

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 beg[...]

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www .k ef.com GP Acoustics (UK) Ltd., Eccleston Road, T ovil, Maidstone, K ent, ME15 6QP U.K. T el: + 44 (0)1622 672261 Fax: + 44 (0)1622 750653 GP Acoustics (US) Inc., 10 Timber Lane , Marlboro , New Jersey 07746 U .S.A. T el: +(1) 732 683 2356 Fax: +(1) 732 683 2358 GP Acoustics GmbH, Heinrichstraße 51, D-44536 Lünen, Deutschland. T el: +49 (0)[...]