CM1 Owner`s Manual and Warranty - E-HiFi
Contents
1. you will need the original sales invoice or other proof of ownership and date of purchase Owner s manual Introduction Thank you for choosing B amp W Please read this manual fully before unpacking and installing the product It will help you to optimise its performance B amp W maintains a network of dedicated distributors in over 60 countries who will be able to help you should you have any problems your dealer cannot resolve Environmental Information B amp W products are designed to comply with international directives on the Restriction of Hazardous Substances RoHS in electrical and electronic equipment and the disposal of Waste Electrical and Electronic Equipment WEEE The crossed wheelie bin symbol indicates compliance and that the products must be appropriately recycled or processed in accordance with these directives Carton Contents Check in the carton for 2 Foam plugs 8 Self adhesive rubber pads Speaker Installation The speakers are best used mounted on rigid floor stands that locate the tweeters approximately at ear level when seated Shelf or wall bracket mounting is an option but it provides less opportunity for optimising the sound through adjustment of speaker position The specific stand or wall mount used will affect the sound quality of the speakers The B amp W FS 700 CM stand is recommended If the speakers are to be placed on a shelf or furniture unit the adhesive pads supplied may be att2. B amp W Bowers amp Wilkins CM1 Owner s Manual and Warranty Figure 1a 0 5m 19 7 in 1 5m 3m gt 0 5m 59 in 118i 19 7 i PJ 59 in in in Figure 1c 5 1 Channels 19 7 in 110 130 Figure 2a AMPLIFIER Figure 1b Figure 1d 6 1 Channels Figure 2b Figure 1e S o LOTO o ooo bo A AMPLIFIER 7 1 Channels Figure 3 English Limited Warranty Dear customer Welcome to B amp W This product has been designed and manufactured to the highest guality standards However if something does go wrong with this product B amp W Loudspeakers and its national distributors warrant free of charge labour exclusion may apply and replacement parts in any country served by an official B amp W distributor This limited warranty is valid for a period of five years from the date of purchase or two years for electronics including amplified loudspeakers Terms and Conditions 1 The warranty is limited to the repair of the equipment Neither transportation nor any other costs nor any risk for removal transportation and installation of products is covered by this warranty 2 This warranty is only valid for the original owner It is not transferable 3 This warranty will not be applicable in cases other than defects in materials and or workmanship at the time of purchase and will not be applicable a for damages caused by incorrect inst
3. ached to the underside of the cabinet Speaker Positioning Adjustment of speaker position following initial installation will probably further improve the sound quality and is usually worthwhile In either stereo or home theatre installations try to ensure that the immediate surroundings of each speaker are similar in acoustic character For example if one speaker is adjacent to bare walls while the other is adjacent to soft furnishings and curtains both the overall sound quality and the stereo image are likely to be compromised Conventional Stereo Systems To begin with the speakers should be positioned between 1 5m and 3m apart at two corners of an egullateral triangle completed by the listening area at the third corner The speakers should be approximately 0 5m away from the back wall and at least 0 5m away from any side walls Figure 1a illustrates this arrangement Home Theatre Systems If the speakers are to be used for the front channels in a home theatre system they should be placed closer together than for 2 channel audio because the surround channels tend to widen the image Positioning the speakers within approximately 0 5m of the sides of the screen will also help keep the sound image in scale with the visual image The speakers height should be somewhere between the centre of the screen and the height of the centre speaker As with conventional stereo positioning the speakers should ideally be approximately 0 5m
4. allation connection or packing b for damages caused by any use other than correct use described in the user manual negligence modifications or use of parts that are not made or authorised by B amp W c for damages caused by faulty or unsuitable ancillary equipment d for damages caused by accidents lightning water fire heat war public disturbances or any other cause beyond the reasonable control of B amp W and its appointed distributors e for products whose serial number has been altered deleted removed or made illegible f if repairs or modifications have been executed by an unauthorised person 4 This guarantee complements any national regional law obligations of dealers or national distributors and does not affect your statutory rights as a customer How to claim repairs under warranty Should service be required please follow the following procedure 1 If the equipment is being used in the country of purchase you should contact the B amp W authorised dealer from whom the equipment was purchased 2 If the equipment is being used outside the country of purchase you should country of residence who will advise where the equipment can be serviced You can call B amp W in the UK or visit our web site to get the contact details of your local distributor To validate your warranty you will need to produce this warranty booklet completed and stamped by your dealer on the date of purchase Alternatively
5. away from the back wall and at least 0 5m away from any side walls If the speakers are to be used for the surround channels in a home theatre system position them as illustrated in Figures 1c to 1e according to the number of channels To achieve even coverage over an extended listening area it is beneficial to raise the speakers above ear height Stray Magnetic Fields The speaker drive units create stray magnetic fields that extend beyond the boundaries of the cabinet We recommend you keep magnetically sensitive articles television and computer screens computer discs audio and video tapes swipe cards and the like at least 0 5m from the speaker Connections All connections should be made with the equipment switched off There are 2 linked pairs of terminals on the back of the speaker For conventional connection the terminal links should remain in place as delivered and just one pair of terminals connected to the amplifier For bi wire connection the terminal links should be removed and each pair of terminals connected to the amplifier independently Bi wiring can improve the resolution of low freguency detail Figures 2a and 2b illustrate conventional and bi wire connection Ensure that positive terminals on the speaker marked and coloured red are connected to the positive output terminal on the amplifier and that negative terminals on the speaker marked and coloured black are connected to the negative output ter
6. minal on the amplifier Incorrect connection can result in poor imaging and loss of bass Ask your dealer for advice when selecting speaker cable Keep its total impedance below the maximum recommended in the speaker specification and use a low inductance cable to avoid attenuation of high freguencies Fine Tuning Before fine tuning make sure that all the connections in the installation are correct and secure Moving the speakers further from the walls will generally reduce the volume of bass Space behind the speakers will also help to create an aural impression of depth Conversely moving the speakers closer to the walls will increase the volume of bass lf you want to reduce the volume of bass without moving the speakers further from the wall fit the foam plugs in the port tubes as illustrated in Figure 3 If the bass seems uneven with frequency this will most probably be due to resonance modes in the listening room Even small changes in the position of the speakers or the listening position can have a profound effect on how these resonances affect the sound Try moving the listening position or locating the speakers along a different wall The presence and position of large pieces of furniture can also influence resonance modes If the central image lacks focus try moving the speakers closer together or angling them inward so that they point at a location just in front of the listening position Figure 1b illustrates speaker
7. o attain their intended design characteristics However longer run in periods as long as a month have been reported and there is evidence to suggest that this has little to do with the speaker changing and more to do with the listener getting used to the new sound This is especially so with highly revealing speakers such as these where there may be a significant increase in the amount of detail compared with what the listener has previously been used to the sound may at first appear too up front and perhaps a little hard After an extended period of time the sound will seem to mellow but without losing clarity and detail Aftercare The cabinet surface usually only requires dusting If you wish to use an aerosol cleaner remove the grille first buy gently pulling it away from the cabinet Spray onto the cleaning cloth not directly onto the cabinet The grille fabric may be cleaned with a normal clothes brush whilst the grille is detached from the cabinet Avoid touching the drive units especially the tweeter as damage may result Technical features Description Drive units Freguency range Freguency response Dispersion Sensitivity Harmonic distortion Nominal impedance Crossover freguency Recommended amplifier power Max recommended cable impedance Net Weight 40 CMI Nautilus tube loaded aluminium dome tweeter Kevlar brand fibre cone bass midrange Flowport 2 way vented b
8. ox system 1x o25mm 1 in aluminium dome high freguency 1x o130mm 5 in woven Kevlar cone bass midrange 6dB at 45Hz and 50kHz 55Hz 22kHz 3dB on reference axis Within 2dB of reference response Horizontal over 60 arc Vertical over 10 arc 84dB spl 2 83V 1m 2nd and 8rd harmonics 90dB 1m lt 1 110Hz 22kHz 8Q minimum 5 1Q 4kHz 30W 100W into 8Q on unclipped programme 0 10 6 7kg 14 7 b BaW BowersaWilkins B amp W Group Ltd Dale Road Worthing West Sussex BN11 2BH England T 44 0 1903 221 800 F 44 0 1903 221 801 info bwgroup com www bwspeakers com B amp W Group UK Sales T 44 1903 221 500 E uksales bwgroup com B amp W Group North America T 1 978 664 2870 E marketing bwgroupusa com B amp W Group Asia Ltd T 852 2 869 9916 E showroom bwgroup hk Copyright B amp W Group Ltd E amp OE Kevlar is a registered trademark of DuPont Nautilus is a trademark of B amp W Group Ltd Printed in England k SNSS L6PF6OII
9. s angled inwards If the sound is too bright increasing the amount of soft furnishing in the room heavier curtains for example may help balance the sound Conversely reducing the amount of soft furnishing may help brighten a dull sound Some rooms suffer from flutter echoes echoes that bounce between parallel room boundaries Flutter echoes can colour the sound of the speakers in the room Test for flutter echoes by standing in the middle of the room and clapping your hands Flutter echoes can be reduced by placing irregular shaped items or non reflective surfaces bookshelves rugs or pictures for example on one of the offending walls or floor Ensure that the speaker stands are upright and firm on the floor Use carpet piercing spikes if appropriate and adjust them to take up any unevenness Running in Period The performance of the speaker will change subtly during the initial listening period If the speaker has been stored in a cold environment the damping Compounds and suspension materials of the drive units will take some time to recover their correct mechanical properties The drive unit Suspensions will also loosen up during the first hours of use The time taken for the speaker to achieve its intended performance will vary depending on previous storage conditions and how it is used As a guide allow up to a week for the temperature effects to stabilise and 15 hours of average use for the mechanical parts t
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