PUBLIC ADDRESS SYSTEM
Public Announcement Speaker
PA systems are used in any public venue that requires that an announcer, performer, etc. be sufficiently audible at a distance or over a large area. Typical applications include sports stadiums, public transportation vehicles and facilities, and live or recorded music venues and events. A PA system may include multiple microphones or other sound sources, a mixing console to combine and modify multiple sources, and multiple amplifiers and loudspeakers for louder volume or wider distribution.
Amplifier
An amplifier can be either a separate piece of equipment or an electrical circuit contained within another device. Amplification is fundamental to modern electronics, and amplifiers are widely used in almost all electronic equipment. Amplifiers can be categorized in different ways. One is by the frequency of the electronic signal being amplified.
- Class A Amplifier – has low efficiency of less than 40% but good signal reproduction and linearity.
- Class B Amplifier – is twice as efficient as class A amplifiers with a maximum theoretical efficiency of about 70% because the amplifying device only conducts (and uses power) for half of the input.
- Class AB Amplifier – has an efficiency rating between that of Class A and Class B but poorer signal reproduction than Class A amplifiers.
- Class C Amplifier – is the most efficient amplifier class but distortion is very high as only a small portion of the input signal is amplified therefore the output signal bears very little resemblance to the input signal. Class C amplifiers have the worst signal reproduction.
- Class-D amplifier or switching amplifier is an electronic amplifier in which the amplifying devices (transistors, usually MOSFETs) operate as electronic switches, and not as linear gain devices as in other amplifiers. They operate by rapidly switching back and forth between the supply rails, using pulse-width modulation, pulse-density modulation, or related techniques to produce a pulse train output.
Wall ceiling speaker
Ceiling speaker are cut and mounted into the above ceiling of room.
They can be installed in offices, schools, gyms, commercial buildings, hospitals, market place and homes.
Ceiling speakers are commonly used to play music and also work as a PA system.
The ceiling speaker system has multiple speakers that can be individually controlled and allows for listening to content from anywhere within its range. While some ceiling speaker systems have limited functionality and are only able to handle basic functions like broadcasting, other systems can be paired with a powerful home amplifier to do all sorts of jobs.
Wall mounted speaker
Wall mounted speakers are speakers that are placed or hoisted onto the walls or inside the walls.
wall mounted speakers are very convenient type of speakers as they take up minimal space and they can be installed with ease .
They are also available in a range of different sizes and features suitable for every budget and need.
