System Overview - Bosch LA3-VARI-B Installation Manual

VARI-directional array
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System Overview

The Bosch VARI product range consists of three line array variants, the configuration software
and an optional CobraNet® module:
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VARI-xx line arrays
The three line array units are identical in physical size and appearance. VARI base units may be
installed on their own, or with either one or two VARI extension units mechanically added to
them. Adding VARI extension units will increase the effective coverage area of the line array
and provide a greater SPL (Sound Pressure Level) within the coverage area for the same
electronic configuration.
The table below shows the continuous SPLs (Sound Pressure Levels) achievable on-axis at
various distances from the loudspeaker for each of the three configurations, mounted at 3 m
above floor level.
Distance VARI-B
20 m
32 m
50 m
VARI-BH base units employ co-axial drivers instead of the single-coil drivers fitted to the
VARI‑B. These give the line arrays an extended high-frequency response and this model is
better suited to applications where the audio system is to reproduce music as well as speech.
VARI extension units may be used to extend either VARI‑B or VARI‑BH base units. By adding
one or two extension units to either base unit, a total of six line array configurations can be
constructed. Refer to NoTrans Variables.
For easy identification an abbreviated array name has been defined for each of the possible
array compositions:
Array name
Vari-array-B1
Vari-array-B2
Vari-array-B3
Vari-array-H1
Vari-array-H2
Vari-array-H3
The mechanical mounting and coupling arrangements of the VARI units are designed to give
composite line arrays the smooth, finished appearance of a single unit when extension units
are employed.
Bosch Security Systems B.V.
LA3-VARI-B : VARI Base unit.
LA3-VARI-BH : VARI Base unit with extended HF response.
LA3-VARI-E : VARI Extension unit.
LA3-VARI-CS : VARI Configuration Set.
LA3-VARI-CM : Optional CobraNet® module.
VARI-B+E
90 dBA -
- 90 dBA
- -
Array composition Elements used
VARI-B
VARI-B+E
VARI-B+E+E
VARI-BH
VARI-BH+E
VARI-BH+E+E
VARI-B+E+E VARI-BH
- 89 dBA
- -
88 dBA -
VARI-B
1
1
1
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Installation manual
System Overview | en
VARI-BH+E VARI-BH+E+E
- -
89 dBA -
- 87 dBA
VARI-BH VARI-E
- -
- 1
- 2
1 -
1 1
1 2
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2018.06 | V1.3 |