Cambridge Audio 540R V3 user manual Speaker delay

Setting each speaker allows the 540R v3 to perform what is called Bass Management and to direct low frequency bass from music and the Low Frequency Effects channel of surround sound material to those speakers best able to reproduce it. If you do not wish to use any of the speakers change it’s setting to ‘None’.

The Subwoofer output can also be set to ‘Yes’ or ‘No’. If no sub is being used make sure this setting is set to ‘No’ to allow the 540R v3 to re- direct the bass information in this channel to other speakers.

Note: The 540R v3 will force some speakers to certain settings in some of the following circumstances!

The Front Left and Right speakers may be ‘Large’ or ‘Small’ but never ‘None’ as they are always required for any type of music/movie reproduction.

Bass must always be reproduced by either the Front Left and Right or Subwoofer channel (or both). The 540R v3 will thus not allow a combination of ‘Small’ front speakers and no subwoofer.

If the Front Left and Right cannot reproduce low frequency bass a Subwoofer must be used i.e. If the Front Left and Right are set as ‘Small’ the Sub must be Set to ‘Yes’.

Also, setting the Front Left and Right as ‘Small’ will always set the other speakers as ‘Small’ (and the Sub to ‘Yes’). This is because LFE/ bass information should not be redirected to the surround channels.

To store the setting simply come back out of the OSD (pressing the OSD button always moves back one menu item, and then exits and stores from the main menu screen).

azur 540R v3

2. Speaker delay

Because the speakers in a surround sound system are usually different distances from the listener the 540R v3 incorporates the ability to apply a variable digital delay to each of the channels so that the sound from each arrives at the same time at the listening position for best surround- sound effect. Each pair of speakers (i.e. Front Left and Right or Surround Left and Right) are subject to the same delay and so must be situated equidistant from the listener.

To set the delay times simply measure the distances from the listening position to each speaker as shown in the following diagram:

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1	= Front Left & Right
2	speakers
2	= Centre speaker
3	= Surround Left & Right
	speakers
4	= Surround Back speaker
	(when used)

4

3

Note: No delay setting for the subwoofer is necessary.

Set the distances in the OSD Speaker Delay menu to the nearest value in metres (1 foot = 0.3 metres). The speed of sound is approx 340 metres per second, the 540R v3 thus introduces approx 3mS of delay per metre of distance set.

Go to the ‘Speaker Delay Menu’ and highlight each speaker in turn. Set the distance to the nearest value to that which you measured by using the Left and Right arrows (the values do not need to be exact):

Speaker	Delay Menu
FL/R	: 30mS/10.20m
C	: 30mS/10.20m
SL/R	: 25mS/ 8.50m
BS	: 25mS/ 8.50m
[UNIT	:	mS/meters]
Return to Menu			: [OSD]

Press the OSD button to exit the menu.

Note: In addition to the delays as set above Dolby Pro Logic II playback also requires an extra 15 milliseconds delay to the surround channels only. This extra delay is part of the Dolby Pro Logic II specification and ensures that sound from the surrounds arrives just after sound from the front reducing the audibility of sound leakage from the front to the surround speakers. Because the relationship between the Dolby Digital and Dolby Pro Logic II two delays is fixed (15mS extra to the surround channels), it is only necessary to set the delay by measuring the distances as we have described. The 540R v3 will automatically provide the appropriate extra delay whenever you switch to a Pro Logic Mode.

ENGLISH

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