Guidelines For Use - Voice Systems Proteus LIVE Bedienungsanleitung

Bi-Amp Processed Active Speaker
The acoustic characteristics of the room/environment in which a sound system is used
have sometimes very significant effects on the overall sound produced.
Thanks to its special technical features (such as the optimal width of its dispersion range),
with the Proteus LIVE some of the most common problems can be reduced or prevented.
However, some factors should be borne in mind as they may help to optimise its performance.
Do not place speakers in the corners of a room or in recesses (e.g. niches),
since this causes an increase in the low frequencies, producing sounds which
are redundant or blurred.
Do not place speakers against a wall, as this also causes an increase in the low
frequencies, although less pronounced than that produced in a corner or niche.
N.B.: on the other hand, this phenomenon may sometimes be used to advantage to reinforce the low range,
but it must be employed carefully and in a controlled way.
Do not place speakers straight on a stage, a floating floor or any other support
with cavities, as this tends to trigger resonances that alter and interfere with the
overall sound.
N.B.: solid supports should always be used when possible, or a speaker stand.
Remember that high frequencies have a high level of directivity and a much
higher absorption coefficient than low frequencies.
Therefore, to guarantee that the signal reaches the listener in an intelligible
form, position speakers so that they are in a direct line with the audience (clearly
visible) about ½ metre / 1 metre above the audience's heads.
In buildings with a lot of reverberation (places of worship, gymnasiums, etc.)
first of all keep the sound reflections down using materials which absorb sound
(carpets, curtains, special panels, etc.).
If this is not possible or is not sufficient, do not simply turn up the volume,
because this will also increase the volume of the reflected sound, and may
make the situation even worse.
The best solution is to use more speakers, placed around the room and closer
to the audience (e.g. front+back; front+sides; front+sides+back).
N.B.: in these circumstances it may prove necessary to use a delay processor to realign the timing of the
sound of the various speakers (i.e. to overcome the delays caused by the sound propagation time), ensuring
that the sound heard by the audience will be free from "echo".
Example: since the speed of sound is about 344 metres a second, sound takes about 1/10 of a second to
travel 30 metres. Therefore, a listener close to a "back" speaker 30 metres from the "front" speaker would
hear the sound from the "back" speaker about 1/10 of a second before the sound from the "front" speaker: in
other words, he would hear two identical sounds 1/10 of a second apart. To ensure that the two sounds
strike the ear of this specific listener at exactly the same time, the sound of the "back" speaker will have to be
delayed by 1/10 of a second using a delay processor.

Guidelines for Use

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