Whether you need a public announcement system for a school, office building, facility, or church, it’s important to know the basics. This article discusses the components of a PA system and how it works. At Sound and Communications in Jackson, MS, we can design a system that takes the size and architecture of your building into account. Keep reading to find out more about these essential sound systems.
What is a PA System ?
PA systems are designed to amplify voices and distribute sounds using the following basic equipment:
- Microphones
- Mixer
- Loudspeakers
- Amplifiers
When someone sings or speaks into a mic, it outputs voltage. This voltage goes directly to a mixer or loudspeaker, which boosts the signal. Finally, the amplified signal increases pressure, causing the speakers to move and recreate the sound at a much higher volume.
Active speakers amplify sound within the speaker itself, while passive speakers connect to a separate amp which boosts the signal. The two different types of speakers require different cabling and adjustment strategies.
Do you have questions about which speaker to use in your space? Our sound system designers will take all the key factors into consideration to give you the best recommendations.
How to Prevent Feedback
When the microphone picks up its own signal, it creates feedback. This high-pitched sound occurs when an amplifier outputs the signal, creating a loop. You can avoid feedback by keeping the speakers far enough away from the microphones.
Here are some additional tips to get the best sound out of your PA system:
- Ensure that the microphones and speakers never directly face one another.
- Mute the speaker or microphone to identify the source of the feedback.
- Keep the required distance between mics and speakers.
- Never place the speakers behind microphones.
- Speak or sing at least one inch away from the microphone.
- Don’t point the microphone in the direction of the speaker.
What Are Mixers for?
Mixers let you adjust sound from the microphones before it goes to loudspeakers throughout your building. By setting the right levels, you can balance the sound before it gets amplified by the speakers.
At Sound and Communications, we can design, install, and maintain the PA system in your school, church, business, or government agency. Let us handle the technical details so you don’t have to.
Contact us at 601-957-5830 to set up an appointment or with any questions about our PA systems. When you fill out our online form, tell us enough about your needs so we can give you an accurate quote.
July 2025 – Soundcom