Bedienungsanleitung Bowers Wilkins CT8 CC (Seite 5 von 58) (Deutsch, Englisch, Holländisch, Französisch, Italienisch, Spanisch, Polnisch)

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output level of that channel’s CT8 XO in order to

restore the correct tonal balance.) The LFE channel is

then distributed to all the main channels that have a

subwoofer assigned by the simple action of

configuring the surround processor as if there were no

subwoofer present and specifying where the LFE

signal should be routed. Strictly speaking, the phrase

"no subwoofer" here means "no subwoofer dedicated

to the LFE channel".

Safety Warning!

A CT800 system is capable of producing

very high sound pressure levels.

Prolonged exposure to high sound levels

can lead first to temporary and later

permanent hearing damage. Do not exceed

recommended Leq (equivalent sound level) exposure

levels, for example, those specified in ISO 1999:1990.

Running In and Ancillary Equipment

Ancillary Equipment

Speakers of this ability deserve signals of the highest

quality. Choose your electronic equipment and

interconnecting cables with care. We can give

guidance on what to look for when choosing ancillary

equipment, but cannot recommend specific items. The

standards of such products are improving all the time

and your dealer will be able to demonstrate a variety

of suitable up-to-date products.

In the specification we recommend a range of amplifier

powers. The higher figure is defined by the power

handling capability of the speaker. When calculating

the power handling, it is assumed that the amplifier is

not run into clipping, which distorts the frequency

power spectrum of the signal, and that the signal is

normal programme material. Test tones from

oscillators and the like are not applicable. The lower

figure is the minimum we consider necessary to

achieve reasonable listening levels without audible

distortion in the smaller room (less than 60 m

2000 cu ft). The higher the power you use, the less

likely you are to experience amplifier clipping.

You can often tell how good an amplifier is at driving

complex speaker loads by looking at its power rating

into both 4Ω and 8Ω loads. The nearer the ratio is to

2:1 the better, as it indicates a good current capability.

In order to reduce the effect the cable has on the

frequency response of the speaker to inaudible levels,

the impedance of the cable at all frequencies

(measuring both positive and negative conductors in

series) should be kept as low as possible and certainly

below 0.1Ω. At low frequencies, the DC resistance of

the cable is the dominant factor and you should

choose a gauge of wire sufficient to achieve the

impedance requirements over the length of cable you

need to use. At mid and high frequencies the inductive

component of the impedance can dominate the DC

resistance. This and other properties influenced by the

detailed construction of the cable become important.

Running In

The performance of the speakers will change subtly

during the initial listening period. If they have been

stored in a cold environment, the damping compounds

and suspension materials 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 speakers to

achieve their intended performance will vary

depending on previous storage conditions and how

they are 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 to 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 a new

sound. It is especially so with highly revealing

speakers such as these, where there may be a

significant increase in the amount of detail portrayed

compared to 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 speaker cabinet surfaces and the casing of the

CT8 XO usually only require dusting. If you wish to use

an aerosol cleaner, remove any speaker grilles first by

gripping round the edges and gently pulling them

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.

When replacing grilles, ensure that the pegs are

correctly aligned with the receptacles in the cabinet

before pushing into place.

Avoid touching the drive unit diaphragms, especially

the tweeter, as damage may result.

Limited Warranty

This product has been designed and manufactured to

the highest quality standards. However, if something

does go wrong with this product, B&W Group Ltd. and

its national distributors warrant free of charge labour

(exclusion may apply) and replacement parts in any

country served by an official B&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.

7106 CT800 manual Inside 30/9/08 9:45 Page 4

Bowers Wilkins CT8 CC Seite 5

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