Manual Bowers Wilkins DB4S (page 4 of 103) (English, German, Dutch, French, Italian, Polish, Portuguese, Turkish, Spanish)

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3.3 Subwoofer Foot Options

DB Series subwoofers must not be

used without one of the foot options tted.

DB Series subwoofers can be tted with either

decoupling, rubber or spike feet. Use of

the different foot types is described in the

following paragraphs:

• The spike feet are intended for use on carpeted

oors. The spikes pierce the carpet and rest on

the oor beneath both to protect the carpet from

indentation and to provide the subwoofer with a

solid foundation.

• The decoupling feet are intended to be used on

suspended wooden oors. The rubber material of

the foot provides a degree of de-coupling

between the oor and subwoofer.

• The rubber feet are intended for use on non-

carpeted solid oors where spike feet might

cause damage the surface.

Due to the underside location of

the subwoofer heat-sink, rubber or

decoupling feet should not be used on

carpeted oors.

In order for feet to be tted to the subwoofer it

must rst be turned upside-down. Take care not

to damage the drive units when handling the

subwoofer, and ensure when upside-down that

the subwoofer rests on a surface that will not

damage its nish.

Fit the feet by screwing one into each of the four

screw holes in the subwoofer underside. In the

case of spike feet, initially screw the lock nuts fully

onto the thread before screwing the feet into the

subwoofer. The lock nut should then be used to

raise the subwoofer above the carpet pile and to

enable adjustment to minimise rocking.

Note: It is particularly important on the DB1D,

DB2D and DB3D to raise the subwoofer above

the carpet pile to ensure that cooling air can ow

around the subwoofer amplier heat-sink panel.

Diagrams 2a and 2b illustrate the use of each

foot type.

Once the feet are tted, the subwoofer can be

turned back on to its feet. Take care not to allow the

entire weight of the subwoofer to rest at an angle on

one or two feet.

Never slide the subwoofer across the

oor on its feet. It must be lifted if it is

to be moved.

If the subwoofer rocks when placed on the oor in

its nal position on spike feet, or the thickness of

carpet means that the spike points do not reach the

oor beneath, adjust the feet until the subwoofer is

supported rmly without rocking and is well clear

of the carpet pile. When adjustment is complete,

tighten all the lock nuts against the underside of the

subwoofer using a 10mm spanner.

3.4 Subwoofer Grilles

Your DB Series subwoofer is supplied with

optional fabric covered grilles (a single grille in the

case of the DB4S). The subwoofer can be used

with or without grilles tted. The grilles are attached

magnetically.

3.5 Connections

DB Series subwoofers require connection to a mains

power supply and an input signal. Connectors

for optional 12V trigger and RS232 control are

also provided. Diagram 3 illustrates the DB Series

subwoofer connection panel.

Mains Power

A variety of different power cables may be packed

with your subwoofer. Use the cable appropriate for

the mains socket in your territory. The subwoofer

will switch on in operational mode, with its standby

button indicator illuminated green, as soon as it is

connected to mains power.

Note: The standby button is located on the front

panel of the DB1D, DB2D and DB3D, and on the

rear panel of the DB4S.

If the subwoofer remains unused for more than 20

minutes it will automatically switch to standby mode

with the indicator illuminated red.

Signal Connections

DB Series subwoofers provide stereo RCA Phono

and stereo balanced XLR inputs. It is possible to

use the Phono and XLR sockets as independently

selectable inputs. This enables your subwoofer to be

integrated with two different audio systems: a home

theatre system and a conventional stereo system

for example. Input selection is managed via the DB

Subwoofers app.

1 - XLR inputs

The balanced XLR inputs are intended for use with

preampliers or audio-visual processors that provide

balanced stereo outputs.

Diagram 3

DB subwoofer connection panel

Diagram 2b

Using decoupling and rubber feet

Note: Balanced connection, where negative,

positive and ground signals are carried on

separate wires, is common in professional and

some high-end domestic audio equipment.

Balanced connection is inherently more

resistant to interference and noise than

unbalanced connection.

2 - RCA Phono inputs

The unbalanced RCA Phono inputs are intended for

use with preampliers or audio-visual processors

that provide only unbalanced stereo outputs.

Note: If your preamplier or audio-visual

processor provides only a mono subwoofer

output, it can be connected to just one of the

subwoofer input sockets.

Control Connections

In addition to mains and signal input sockets the

DB Series subwoofer connection panel carries the

following optional control interface sockets:

3 - 12V Trigger 1: 3.5mm jack socket

The Trigger 1 socket enables wired remote control of

the subwoofer switch on and standby functions.

4 - 12V Trigger 2: 3.5mm jack socket

The Trigger 2 socket enables wired remote control of

subwoofer input selection.

5 - RS-232: 9-pin D connector

The RS232 interface enables subwoofers to be

incorporated in remote control home automation

systems. Your Bowers & Wilkins retailer will be able

to provide more information on RS232 based home

automation systems.

Diagram 2a

Using spike feet

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Bowers Wilkins DB4S Manual

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