Doc.No.: 03118-000-IS
Page 4 of 12
For PA (Emergency PA) the minimum figures are 75dBA and at least 20 dBA above the speech
interference level for interior spaces. For exterior spaces the minimum requirement is 80 dBA and at
least 15 dBA above the speech interference level.
To ensure this, the MPA 1600 system makes use of the industrial standardized 100 V line distribution
system. This is a distribution system that is based on a fixed line level (100V) and where the
loudspeaker output power is determined by means of loudspeaker type and power tapping. Hence, each
loudspeaker meeting this line specification is equipped with an audio transformer with several tapping
possibilities.
In a system like this where the amount of loudspeakers, loudspeaker types (power rating) and tapping
decides the coverage and sound pressure.
To comply with the environment requirement all loudspeakers used in a PA / GA system must be
approved according to relevant parts of IEC60945 or similar.
Typical loudspeaker data sheets (next page):
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