User manual

C4/C5/C6/C7 Active

1.1 Centre Speaker Placement

The positioning constraints on a centre channel loudspeaker are always influenced by

the type and location and of the associated screen.However,the basic parameters that

influence the subjective performance of any loudspeaker in a listening room -

alignment to the listening position and proximity of room boundaries - also apply to

a centre channel and should be taken into account.

ATC centre channel speakers are intended to be positioned relatively clear of room

boundaries and centrally either just below or just above the screen. If the screen is

either a plasma or projector type located close to the wall it may not be possible to

position the centre channel speaker very far forward.In these cases,some adjustment

of low frequency equalisation via the AV processor may be necessary to reduce excess

bass. It is always preferable however to experiment with loudspeaker positioning

before resorting to electronic equalisation.

If the screen is a CRT type and its stand is also to carry the centre channel speaker it

is advisable to mount the speaker via some decoupling material so that vibration does

not disturb the picture.

While every ATC centre channel speaker is effectively magnetically shielded, the

extreme sensitivity of some CRT tubes to residual levels of magnetic flux may mean

that, in rare cases,ATC centre channel speakers are not appropriate.Adjusting the

relative front/back position of the center speaker and the CRT can reduce magnetic

interference but should your screen suffer intractable picture distortion caused by the

proximity of a centre speaker contact your dealer or installer for advice.

If the centre speaker is to be placed in any form of cabinet, adequate side and top

clearance for cooling airflow must be provided.

More information on loudspeaker positioning in multi-channel systems can be found

later in this manual in Section 5.

1.2 Connection

Two cable connections are required for each monitor: one for

mains power and one for the audio signal.The mains cable is

specifically supplied to comply with local statutory safety

approvals and alternatives should not be substituted.If you intend

to use your monitors in an alternative territory please contact

ATC for advice.The mains connection must always be earthed.

The signal cable and plug (not necessarily supplied) should be

of a good quality and XLR terminated. Poor cable and plug

quality will compromise the performance of your monitors.The

signal input pin configuration is illustrated in Diagram 1.

Diagram 1 - input connection pins

Pin 1,ScreenPin 2,Signal (hot)

Pin 3,Signal (return)

Centre Speaker Installation