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SOUND COLUMNS
GENERAL INFORMATION
Sound columns are special sound speakers, designed to satisfy
specific directivity requirements. Using the acoustic principle of
phase interferences between two or more loudspeakers, placed
near each other along a vertical axis, it is possible to reduce the
vertical angle of the output sound front. The higher the number of
speakers, the smaller the output angle. Reducing this angle makes
it possible to limit the quantity of sound energy directed towards
reflecting surfaces (such as floors and ceilings), thus increasing the
intelligibility of the diffused program even in environments with a
high level of reverberation.
DESCRIPTION
The new columns of the C400 range feature loudspeakers with a
broad response range and high-efficiency tweeters enabling perfect
intelligibility of speech and accurate reproduction of music. In
particular, models C450-TW and C4100-TW (waterproof) are
suitable for outdoor use, even in bad weather. All the models have
line-repeating coils. The connections to the various different plugs
are available with cables leading out from the column: for connection
refer to the data plate on the rear of the column. These columns can
be turned in any direction thanks to the S4-B swivel joint included
in the supply.
COLUMN OPERATION
For column positioning you shall keep into account the specific
output angles of the various models, as shown in the Specifications.
You shall choose the right height at which the column shall be placed
and the tilting angle towards the distribution area to avoid "dimmed"
listening zones (i.e. outside the column's sound scattering angle). To
cover a wider area on the horizontal plane, you can mount two
columns side by side at about 60° from each other. Do not use a
smaller angle as interference might occur in the areas where radiation
patterns overlap.
MOUNTING THE COLUMNS
The jointed S4-B support is supplied with the equipment. It can be used
to secure the column to a wall and to point it in the desired direction. The
support should preferably be fixed to the centre of the column, compatibly
with the desired inclination. To do this, use the four screws supplied with
the equipment (Fig. 2). For securing to a wall, use of screws and/or
expansion bolts of the appropriate size in relation to the weight of the
column and the type of wall is recommended. Using a threaded M6x20
grub screw, as shown in Fig. 3, it is possible to mount the two sound
columns (both of the same type) one on top of the other. In this way a
single sound column is obtained which is twice as high, with an opening
angle on the vertical plane which is further reduced.
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