Filter
Top Products
Intellivox DDC | Installation Manual | Introduction
Bosch Security Systems | July 2003
EN
|
5
1. Introduction.
This paper describes the factory recommended
installation procedure for the Bosch Security Systems’
Intellivox range of controlled loudspeaker-arrays.
This type of loudspeaker-array is equipped with an on-
board Digital Signal Processor (DSP) module. This
manual describes mechanical matters like mounting
hole positions and outlets for cable feed-through, as
well as information for wiring of the connectors.
A very important parameter is the mounting height.
This parameter can be very confusing, because during
the acoustical design process the height of the
acoustically active part of the column is optimized,
while during installation the issue of interest is the
physical mounting height of the column. Unfortunately
there is no fixed relation between these two, because
the exact position of the acoustical part of the array
inside the enclosure is depending on the location of the
electronics module. In the standard LBC 325x/00
versions of the Intellivox, the electronics module is
mounted in the lower end of the enclosure (as it is
shown in Fig 1). The LBC 325x/10 versions however,
have the electronics module mounted at the top end.
Because of the extreme tight vertical radiation pattern
of the Intellivox, a small deviation from the calculated
acoustical mounting height may cause severe
degradation of the expected performance.
For this reason the designer is advised to define two
mounting heights, a physical mounting height which
refers to the physical bottom side of the enclosure, and
an acoustical mounting height, referring to the on-axis
location of the loudspeaker at the lowest position.
Although the physical mounting positions are of
primary concern to the contractor, a quick check of the
acoustical height during installation will confirm the
integrity of the original acoustical design.
Fig 1 Intellivox-2c shown without front grill.
Connector
compartment
Electronics
module
Reference point for
acoustical mounting
height
Reference point for
physical mounting
height