3.4. Asymetrical and rotative
horns
50º
Nearfield
100º
TOP.S-12A
models incorporate an asymmetrical
dispersion horn which will optimise coverage
either in horizontal or vertical position.
To rotate the horn, unscrewed the frontal grille,
and then, unscrewed the four fixing screws of
the horn. Rotate it 90 degrees taking care of the
wires. Screw the horn again and finally place the
frontal grille in its right position.
Good coverage of audiences often is a
conflicting combination of:
* wide coverage for the closest audience (short
throw)
* narrow coverage for distant areas ( long throw)
The asymmetrical dispersion horn coverage
varies from "short throw" to "long throw" along
the vertical axis (keeping a constant vertical
directivity). In conclusion, directivity feature of
(50º to 100º(H), 55º(V)) can be seen as if the
horn itself had "two" horizontal directivities
(audience coverage), which depend on the
distance. For short distances the horn should be
used with its "wide" dispersion (100º). For long
distances the horn should be used with its
"narrow" dispersion (50º).
We suggest to pay attention to the following
examples.
3.4.1. Vertical-Positioned Cabinets
(Hung and aiming to the audience)
We need wide coverage (100º) for the closest
listeners and narrow coverage for the distant
audience.
Difusor position:
.4.2. Horizontal-Positioned Cabinets
e need wide coverage (100º) for the closest
ifusor position
ARNING:
e the
"Nearfield"
mark printed on
3
(Hung and aiming to the audience)
W
listeners and narrow coverage for the distant
audience.
D
50º
100º
SHORT THROW
LONG THROW
50º
100º
Nearfield
W
The horns hav
the 100º horizontal coverage side.
100º
50º
LONG THROW
SHORT THROW
Near Field
TOP.S 12A
2009
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