Manual Bowers Wilkins ASW608 (page 12 of 78) (English, German, Dutch, French, Italian, Polish, Portuguese, Spanish)

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English

Owner’s manual

Introduction

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:

1 Mains cable

1 Accessory pack containing:

4 M6 spike feet

4 M6 rubber feet

4 Lock nuts (10mm across flats)

Installation

The subwoofer has been designed both for Home

Theatre installations and to augment the bass

performance of ‘full range’ speakers in 2-channel

audio systems. All audio installations require some

thought in installation if they are to reach their full

performance potential and this manual will guide you

through the process.

The subwoofer requires connection to the mains

power supply, so it is important that you familiarise

yourself with the safety instructions and heed all the

warnings. Keep this manual in a safe place for future

reference.

The Subwoofer Connection and Control

Panel (Figure 1)

1. Status indicator.

2. On, Auto, Stand-by switch.

3. Line-level input volume.

4. Speaker level input volume.

5. Low-pass filter frequency.

6. Low-pass filter selection switch.

7. Bass extension switch.

8. Equalisation switch.

9. Phase reverse switch.

10. 12V trigger input.

11. Line level input sockets (left and right).

12. Speaker level input binding posts (left and right).

13. Mains input.

14. External fuse holder.

Subwoofer Applications

The primary function of a subwoofer is to reproduce

signals from an audio-visual processor Low Frequency

Effects (LFE) channel. In addition, the processor may

be configured to divert the low bass portion from

some or all of the other channels and add it to the LFE

information. This is usually done by selecting “small”

loudspeakers in the processor set-up procedure.

In 2-channel audio applications a subwoofer is used to

extend the bass response lower than that provided by

the satellite speakers. The subwoofer low-pass filter

should be set so that the subwoofer takes over as the

output of the satellite speakers falls.

Subwoofer Positioning and Installation

The ear poorly perceives the source location of low

frequency sound so the position of subwoofers in the

listening room is generally less critical compared to

full-range speakers. However, best results are usually

obtained if the subwoofer is placed between the left

and right speakers or in the vicinity of one of them. If

two subwoofers are used, it is best to put one near

the left and one near the right speaker. Placing a

subwoofer behind the listening position, even in multi-

channel surround sound installations, generally results

in inferior imaging, but may be an acceptable

compromise if domestic considerations dictate.

As with all speakers, the proximity of room boundaries

affects the sound of a subwoofer. Bass volume

increases as more surfaces come into close proximity

with the speaker. Unlike full-range speakers, however,

the overall system balance can be corrected by

adjusting the volume level of the subwoofer. The more

boost gained from the room, the lower the volume can

be set and the less hard the subwoofer has to work;

but there is a down side. Subwoofers positioned near

corners often generate more low-frequency room

resonances, making the bass more uneven with

frequency. There is no substitute for experiment as all

rooms behave differently, so the subwoofer should be

tried in a variety of positions before a final decision is

made. A piece of music with a bass line ascending or

descending the musical scale is useful for assessing

the smoothness of the bass response. Listen for

exaggerated or quiet notes.

If the subwoofer is to be used in a confined space

(e.g. built into furniture), the space must be ventilated

to allow sufficient air to circulate and cool the unit. Ask

your dealer for advice.

The subwoofer is intended to be floor mounted only. It

is important to ensure the subwoofer stands firmly on

the floor using the spike feet supplied whenever

possible. The spike feet are designed to pierce carpet

and rest on the floor surface. Initially, screw the lock

nuts onto the spikes enough to leave the nuts floating

just above the carpet when the spikes are resting on

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Bowers Wilkins ASW608 Manual

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