The Purpose of PA system is to announce or convey a message to large audience. Micro phone is used as input unit in a public addressing system, which converts sound in to electrical waves. Amplifiers will amplify the waves to strengthen the signal. Speakers are the output unit which will give sound waves as output to make it audible to public. capacity of loud speakers depend on the watts it can carry.
• PA System as Voice Evacuation System

PA system commonly used as voice evacuation system in case of any emergency. During and emergency voice evacuation system releases recorded voice to the public to evacuate. We can integrate this evacuation system with fire alarm system.

• Back Ground Music System

Back ground music system is commonly used in cafes, pubs, retail stores. system is a combination of speakers, music players, sub woofers and mixers with amplifiers.