APPLICATION NOTE | ACTIVE LINE ARRAY LOUDSPEAKERS APPLICATION NOTE | ACTIVE LINE ARRAY LOUDSPEAKERS
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INTELLIVOX DDC
with distributed
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No amplifier power is required to drive the Intellivox
public address systems
loudspeakers, because they incorporate their own ampli-
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fiers. Each loudspeaker simply has to be connected to a
single-phase 120/230 V (450 VA) power outlet. The 100 V
3 line is connected directly to the appropriate input on the
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Intellivox loudspeaker.
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Loudspeaker mounting and configuration
Because the directivity of these loudspeakers is adjusted
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by software, they can be mounted flat against the wall or
in recesses (flush-mounted). A PC running the WinCon-
trol software is connected directly to the line array to
Solution
 shape the loudspeaker s sound; setting elevation angle,
Intellivox line arrays can easily be incorporated into a
vertical opening angle and focus distance to match the
typical public address system with switching, amplifiers
requirements of the room and listening area. If required,
and 100 V lines. A single Intellivox loudspeaker can be
the sound color can be adjusted with the built-in para-
used to deliver superb intelligibility of speech and
metric equalizer.
music to extremely large areas, as well as rooms which
present a particular acoustic challenge. Requiring less
Once the adjustment is completed, the PC is disconnected
loudspeakers for any given room cuts costs, shortens
and the loudspeakers are ready to operate.
installation time and means less amplifier power is
The settings are stored in the loudspeaker, and
required during operation.
Intellivox DDC (Digital Directivity Control) is a range of
are retained even if the power supply to the loudspeakers
five active line array loudspeakers with integrated class-D Introduction
is disrupted.
In a shopping mall, for instance, the whole central hall
amplifiers and a digital signal processor (DSP) The char- The main requirement of a public address system is to
can be covered with just a few Intellivox loudspeak-
acteristics of Intellivox loudspeakers can be adjusted by distribute attention signals, live speech announcements,
ers (1) that blend seamlessly into the interior. Ceiling
software to match any environment, literally providing stored messages and background music to one or more
Configuration
loudspeakers (2) can be installed in the adjacent corri-
 tailor-made audio. This unique capability leads to excep- public areas. It should inform the public in general, and
LBC 3251/xx Intellivox-1b up to Intellivox-6c depending (1)
dors, shops and food courts . For the parking lot, horns
LBC 3256/xx: on size of the area. tional speech intelligibility - the best there is. Loudspeak- alert in emergency situations. This obviously means that
(3) can be used connected to the same public
LBC 3951/01, 9/6W Ceiling loudspeakers : Multiple (2)
ers up to 5 m in length are available offering an extreme any loudspeakers used must be reliable, and of such quality
address system (4).
LBC 3491/12, 15/10W Horn loudspeaker : Multiple (3)
long throw, so just a few are needed for a cost-effective so the public can hear these announcements clearly. The
When listening areas overlap, delay units may have to
LBB 1925/10, Plena 6-zone system pre-amplifier : 1x (4)
solution in even the largest of buildings. The integrated loudspeakers should also be able to operate from switched
LBC 193x/00, 120, 240 or 480W Plena booster : 1 or several (5)
be used together with the ceiling loudspeakers to syn-
remote monitoring capability gives the advantage of con- 100 V lines so different zones can be selected and addressed
LBB 1941/00, All-Call Plena call station : 1x (6)
chronize their sound with the output of the Intellivox
tinuously knowing system status, and makes these active from a central point.
LBB 1946/00, 6-zone Plena call station : 1x (7)
loudspeaker.
LBB 1961/00, Plena tuner and CD/MP3 player : 1x (8) loudspeakers a key part in a compliant Voice Evacuation
System. Summary of requirements
" Superb speech intelligibility
Public address system " Reliable operation
This application note describes how Intellivox active line " 100 V line compatible
array loudspeakers can be used as part of a public address " Speech and music reproduction
system. They can be used in a variety of venues, including
airports, schools, hotels and shopping malls.
Bosch Security Systems
For more information please visit
www.boschsecuritysystems.com
Data subject to change without notice | Printed in The Netherlands | 2003 - 9922 141 50441en
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