This document discusses different types of public address (PA) systems. A traditional PA system consists of a microphone, zone amplifier, and speakers. PA over IP uses an IP network instead of a centralized amplifier to distribute audio to locations within reach of the network. A hybrid system combines traditional zone amplifiers with a digital logic system, allowing for selective paging while keeping costs lower than a fully digital system. The document provides examples of different PA system setups for venues like schools, hospitals, and metro stations.

1. PUBLIC ADDRESS SYSTEM
• BASIC INTRODUCTION
• TRADITIONAL PA SYSTEM
• PA OVER IP
• HYBRID SYSTEMS
Prepared By – Raghvendra Singh
Exodus Information Technology Pvt.
Ltd.
717-718, 7th Floor, Damji Shamji Business Galleria,
LBS Marg, Above D-Mart, Kanjurmarg (West),

2. BASIC INTRODUCTION
• A public address system (PA system) is an electronic sound
amplification and distribution system with
a microphone, amplifier and loudspeakers, used to allow a
person to speak to a large public OR audience.
• PA systems with many speakers are widely used to make
announcements in public, institutional and commercial
buildings and locations, such as schools, stadiums and large
passenger vessels and aircraft.
• PA system can be used not only to address a large audience but
in current days its often used to address to a specific target

3. TRADITIONAL PA SYSTEM
• The traditional PA systems consist of a microphone, a zone amplifier,
and one or more loudspeakers.
• Simple and small PA systems of this type, often providing 50 to 200
watts of power, are often used in small venues such as auditoriums,
churches, and small bars.
• A sound source such as a Compact Disc player or radio may be
connected to a PA system so that music can be played through the
system.
• Benefit: Setup Cost is very less as compared to IP Paging.
• Drawback:
• This system can not be used for Selective Paging.
• The system is not intelligent / non-programmable.

4. TRADITIONAL PA SETUP
Zone
Amplifier
Microphone
Speakers

5. PA OVER IP
• PA over IP refers to PA paging and intercom systems that use an IP
network instead of a centralized amplifier to distribute the audio signal
to paging locations across a building or campus, or anywhere else in the
reach of the IP network (including the Internet)
• The digital PA systems consist of one or more paging microphones,
Digital Sound Processing Unit (DSP), Digital Zone Amplifiers, and one or
more speakers per zone.
• Digital PA systems of this type, can be configured to have any number of
watts of Amplifier power, And are often used in Big venues such as
school, College, Multistory corporate ventures, Hospitals, etc.
• Benefit:
• This system can be used for Selective Paging to a specific classroom OR Full
premises.
• The system is intelligent / programmable. Any permutation and combination
can be configured.

6. DIGITAL PA SETUP FOR METRO STATION

7. HYBRID PAGING SYSTEM
• This type of PA System is mixture of both The Traditional And Digital
type of PA system.
• It uses Logical System (Brain) from Digital Technology and integrates
zone amplifiers from the traditional technology.
• This type of PA systems used in Malls, school, College, Multistory
corporate ventures, Hospitals, etc.
• Benefit:
• This system can be used for Selective Paging to a specific classroom OR Full
premises.
• The system is intelligent / programmable. Any permutation and combination
can be configured.
• It can auto switch to Fire Alarm Evacuation Message. All other task like
Paging / BGM is stopped
• Setup Cost is under budget as compared to Digital Paging System.