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Setting Loudspeaker Sizes
Many digital AV Processors require you to specify the size of speakers in all channels. These are usually
‘Large or small’. For Opus set the front speakers to ‘large’, set the centre to ‘large’ and the surrounds to
small. The subwoofer then will reproduce only the LFE bass signals.
If you are not using a subwoofer: Set the front speakers to set the subwoofer option on the processor to
‘Off’ or ‘No’. The front channels will now receive all the system bass.
(If you are using a subwoofer: When front speakers are set to small the bass for these channels will
pass into the subwoofer. If you choose large for the front channels, bass will be reproduced from the
front speakers and the sub will just control the LFE channel).
Setting Levels
Once the loudspeaker settings have been finalised, put the AV amplifier into its “test” mode (see
instructions supplied with your processor). Adjust the level of each channel in turn until all channels are
reproduced at equal loudness.
On some programme material the surround channel may seem lower than the front. Do not readjust
this level. You may, however, need to adjust the subwoofer output level. Avoid setting too high a level or
you will swamp the sound with bass. This can be tiring to listen to, and may limit the subwoofer’s abili-
ty to respond to large bass transients. You should also set a sensible level going into the subwoofer
from the AV processor.
SETTING UP AV SYSTEMS