The Wonder of Audio Amplifiers

Generally, when people hear the word "amplifier," stereo components or musical equipment comes to mind. However, these are only one representation of the broad spectrum of audio amplifiers. In actuality, there are numerous amplifiers around us. One can find them in a television, computer, portable CD player, and other devices that use a speaker to produce sound.

An amplifier produces and delivers the power that drives speakers used on a stereo, home theatre system, and other audio setup. In other words, it increases the power of audio signals to a level that is compatible with loudspeakers. Although an amplifier's input signal measures about a few hundred microwatts only, its output can reach up to thousands of watts. To use amplifiers, speakers should closely match the amplifier. This is to prevent overloading and causing burnout if the speakers draw power than what the amplifier can deliver.

Most amplifiers are cabinets that contain five discrete amplifiers or more, which are individually designed to process a different signal. For example, stereo recordings on an audio CD use two channels to record it. When amplifiers are connected to the CD player, the former process the two distinct signals through smaller amplifiers and then sends out each signal to its respective speakers.

If an amplifier is used in a home theatre system, it processes the front left and right sources of sound, a centre channel for dialogue in films and TV programs, the left and right rear sources of sound, and a signal with low frequency, which can be sent to a powered subwoofer to produce a deep bass. So, if you connect multiple speakers for your home theatre system, the amplifier will expand your enjoyment to an unparalleled height.

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