Arcam AVR surround amplifier AVR400 - Manual (Page 20)

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speakers
The AVr400 allows you to connect up to seven speakers
and an active subwoofer in the main system. The output
channels correspond to speakers installed in the front
left, centre, front right, surround left, surround right,
surround back left, surround back right and an active
subwoofer.
The configuration and placement of your speakers
is very important. All speakers, with the exception of
the subwoofer, should be arranged around your normal
viewing/listening position. The subwoofer should be
placed in a position which gives an even frequency
response in all listening positions. Incorrect placement
leads to bass boom in some areas. Often the only
way to find a good position for your subwoofer is by
experimentation. A good place to start experimenting
is close to a wall but at least 1m away from any corners.
You can also consult your subwoofer handbook for
placement suggestions.
SBL SBR
C
L R
SW
SL SR
Front left and right
Position your front left and right speakers to
achieve a good stereo image for normal musical
reproduction as well as for the multichannel
modes. If they are placed too close together there
will be a lack of spaciousness; if they are placed
too far apart a stereo image will appear to have a
large ‘hole’ in the middle and will be presented in
two halves. If there is no practical alternative to
placing the speakers widely apart, this effect can
be overcome in music reproduction by using the
centre sound extraction from the left and right
speakers (see Dolby Pro Logic II Music mode).
Centre
The centre speaker allows for a more realistic
reproduction of dialogue. The centre speaker
should have a similar tonal balance to the front
left and right speakers and be positioned at a
similar height.
Surround left and right
The surround left and right speakers reproduce
the ambient sound and effects present in a
multichannel home cinema system and should be
installed slightly higher than the listener’s ears.
Surround back left and right
The surround back left and right speakers
are used to add extra depth and better
sound localisation and should be installed
approximately one metre higher than the
listener’s ears. Place the two surround
back speakers such that there is an arc of
approximately 150 degrees between each
surround back speaker and the centre speaker.
The surround back speakers should face the front
of the room as shown in the diagram to provide
the largest ‘sweet spot’.
Subwoofer
A subwoofer will greatly improve the bass performance of
your system. This is useful for reproducing special cinema
effects, especially where a dedicated LFE (Low Frequency
Effects) channel is available, as with many discs encoded
with Dolby or DTS technologies.
More than one subwoofer unit may be required for larger
installations, particularly in rooms of a timber frame
construction. Multiple subwoofers need care in placement
because there may be cancellation effects between the
units and you may require expert advice.