India's Verified PA & Public Address System Sourcing Network

What is a 100V line PA system and why is it used in India?

A: A 100V constant-voltage system allows multiple speakers to be connected over long cable runs without power loss – the standard for large institutional PA installations across India.

How loud should a PA system be for a noisy Indian factory?

A: Factory ambient noise typically reaches 85–95dB; PA systems must deliver at least 100–110dB SPL at listener positions to be clearly audible above machine noise.

Is an emergency PA system mandatory in Indian commercial buildings?

A: Yes – NBC 2016 Part 4 mandates voice evacuation PA systems in all high-rise buildings (15m+), malls, hospitals, airports and assembly occupancies above 300 persons.

What is the difference between analog and IP-based PA systems?

A: Analog PA uses dedicated cabling per zone; IP PA uses standard network infrastructure for audio distribution, allowing unlimited zones, remote management and SIP integration.

What backup power is required for PA systems in Indian institutions?

A: NBC 2016 requires a minimum 30-minute battery backup for emergency PA systems; hospitals and airports typically specify 2–4 hours based on evacuation requirements.

How do I prevent feedback squeal in a school PA system?

A: Position microphones at least 2 metres from speakers, angle speakers downward, use graphic equalisation to cut feedback frequencies, and install directional microphones.