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Public Address System had been design with regard to public paging in public building, universities and business building. Should there be any emergency evacuation process the paging coming from the speaker has to be easily perceived. A excellent public address system will ensure that public are able to hear the paging clearly will be able to understand with what it is saying. You can also play back music in with this system.

The speakers will consist of ceiling speaker spread evenly to the place. Workplace areas or cafe will require this sort of speaker. For car park or stadium the loudspeaker use can be horn speaker for higher audio level and for far.

To make the public address system in the construction we must determine the volume of ceiling speakers needed to cover the area. Most of the buildings will either have high level recessed like the lobby area at the entrance or lower level ceiling commonly seen in the office block. By indicating the correct number of the speakers needed for each this area will ensure coverage. As a rule of thumb the more ceiling speaker more suitable is the audio distribution. At this point we could easily calculate the quantity of amplifier required to drive the loudspeaker. Lastly we separate the speakers within a variety of zones for easy identification like different zone for each office level in lobby and for car park zone.

The recessed speaker is commonly a small watts type and with matching transformer it could be link as one group other recessed speaker. With this you can connect to as many recessed speakers as can allow straight into one zone and the only limit is total connected speakers power mustn’t pass the power amplifier power level. So let say your power amplifier is a two hundred and forty watts that’s mean you are able to link up to 80 numbers of three watts ceiling speakers.

If you want to design sound system for meeting room you will need a even larger loudspeaker and higher amplifier as compare to pa system. Meeting room and auditorium will require this system for live speeches and audio playback. Same with the public address system type we need to ensure that loudness is maintained throughout the room. to obtain these design requirements, the speaker has to be arranged and placement to project the sound to the listening audience. At some point we need to add long throw speaker to cover the last rows seats and the nearfield speaker to cover the front seats.

So designing a sound system for auditorium can be much more advanced compare to design pa system. A small meeting room layout will always be basic because this will certainly only need two loudspeaker but for large room the design will ask about eight to 12 loudspeakers in order to produce a good sound pressure level to every seating area.