Such setups are necessary where people are in need of high quality sound effects and where there is a huge space to cover with equal quality of sound effects and video visibility.
The sound track quality and video-graphics depend on the way they have been recorded. The way the track has been recorded and treated through various equipment is surely an important process.
Most of the time people need to avoid the various annoying effects that most people have when the equipment does not comply with the quality needs.
Especially when the space is larger than average room or when the sound track is going to be played in a huge open area or hall, it is an obvious thing that people need to avoid the disturbing effects coming from the surrounding area and also the noise in the sound track itself.
The annoying effect everyone wants to avoid include the background noise in the tracks. Which is easily avoided if the sound is treated carefully with latest uninterrupted technology.
Further, the presence of uneven and echoing sound creates a lot of disturbance and that needs to be removed by using the most suitable compensatory technology.
Consistent disturbance and annoying sounds and interruption due to lack of proper audio equipment also disturbs the overall track and that mist be treated carefully to give a good quality effect.