How Do Audio Power Amplifiers Work?

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If you were ever wondering exactly how power amplifiers work, then read on. I’m going to give you a very simple overview of some techniques which are used nowadays in audio amplifiers. Obviously, every manufacturer pretty much has refined their own technology. However, most of today’s amplifier technologies are all related to commonly known technologies.

First of all, let’s discuss the function of a power amplifier. The reason that amplifiers are needed is because a loudspeaker is not able to be driven directly from a regular source such as a DVD player. The signal which is delivered by the audio source is not strong enough to drive the speaker. Because speakers have very low impedances which means that the current that they requires fairly high, the signal which is provided to the speaker has to come from a source with very low internal resistance. All audio sources have a fairly high internal resistance …