Introduction | Bosch Appliances LBC 325X guide

Intellivox DDC Installation Manual Introduction	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.

Connector compartment

Electronics module