PAS consist of four pieces of electronic equipment that when combined reinforce and distribute sound, most often to multiple zones.
PA systems are used to allow a person to address large groups in public, institutional and commercial buildings and locations or places where people congregate such as rail terminals, airports, schools, office buildings and places of worship. Some of the PA products might be under specified or might suffer from poor technical installation. PA systems might also be used to convey messages in the case of emergency.
PAS - Details
If you're in the market for a PA system the last thing you want is to end up with a system that annoys listeners with poor sound quality and substandard sound clarity. So what are the typical causes of poorly performing public address systems? An inferior quality amplifier, speaker of microphone most often is to blame. Some of the PA products might be under specified or might suffer from poor technical installation. Very often poor quality leads are used causing major interference. When purchasing or deciding on a public address systems it pays to perform adequate due diligence and really take the time to become an expert on the subject. Become informed, read manuals and technical data sheets, do research online and speak to vendors and manufacturers in you have the opportunity.