Bowers & Wilkins Your Guide to Optimizing Speaker Performance

Page 5

English

Owner’s manual

Dear customer,

Thank you for choosing Bowers & Wilkins. Please read this manual fully before unpacking and installing the product. It will help you to optimise its performance. B&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

All B&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). These symbols indicate compliance and that the products must be appropriately recycled or processed in accordance with these directives. Consult your local waste disposal authority for guidance.

Carton Contents

Check in the carton for:

2 Two-part 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&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 attached 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 equilateral 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 at least 0.5m away from any side walls. If the speakers are preferred placed against the back wall and this location results in over emphasized bass, see the Fine Tuning section of this manual for information on using the foam plugs.

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. LCD and plasma screens are not affected by magnetic fields.

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-frequency 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 terminal 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 frequencies.

Fine Tuning

Before fine tuning, make sure that all the connections in the installation are correct and secure.

2

Image 5
Contents CM Series 130 o Page Contents English Running-in Period Limited WarrantyAftercare Terms and ConditionsManuel d’utilisation FrançaisSystèmes Home Cinema Systèmes stéréophoniques conventionnelsChamps magnétiques BranchementsPériode de rodage Garantie limitéeEntretien ConditionsBedienungsanleitung DeutschHeimkinosysteme Herkömmliche StereosystemeMagnetische Streufelder Anschließen der LautsprecherGarantie EinlaufphasePflege GarantiebedingungenManual de instrucciones EspañolSistemas de Cine en Casa Sistemas Estereofónicos ConvencionalesCampos Magnéticos Parásitos ConexionesPeríodo de Rodaje Garantía limitadaCuidado y Mantenimiento Términos y condicionesManual do utilizador PortuguêsCampos Magnéticos Sistemas de Cinema em CasaLigações AfinaçãoManutenção Garantia limitadaTermos e condições Como reivindicar reparações sob garantiaManuale di istruzioni ItalianoCampi magnetici dispersi Sistemi Home TheatreCollegamenti Regolazione fineManutenzione Garanzia limitataTermini e condizioni Riparazioni in garanziaHandleiding NederlandsNazorg FijnafstemmingInspelen Ελληνικά Συµστερεσυστήµατα Ττων ηΣυστήµατα κινηµατ Ελεύθερα µαγνητικά πεδίαΠερίπρ Περι ΕγγύησηΦρτων η Της εγγύησηςΠώς να απαιτήσετε επισκευή στα πλαίσια της εγγύησης Руководство по эксплуатации РусскийУход за колонками Тонкая настройкаПрогрев и приработка Куда обратиться за гарантийным обслуживанием Ограниченная ГарантияУсловия гарантии Návod k pouãití EskyFinální doladní ZárukaRozehrávání reprosoustav ÚdrãbaHasználati útmutató MagyarHázi mozi rendszerek Hagyományos sztereó rendszerekSzórt mágneses mezµk CsatlakoztatásBejáratási idµszak Korlátozott garanciaGondozás FeltételekInstrukcja uÃytkownika PolskiSystem kina domowego Konwencjonalny system stereoRozproszone pola magnetyczne Pod¡ƒczeniaPiel∆gnacja GwarancjaWarunki gwarancji Jak reklamowaπ sprz∆t na gwarancjiPage Page Page Page Page Page Page Page Page Page Page CM1 CM5 II11053 Issue