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Introduction and fundamentals

“Why do rhythms and melodies, which are composed of sound, resemble the feelings; while this is not the case for tastes, colours or smells?”

Aristotle

1.0 What are audio power amplifiers for?

In sound systems, power amplifiers are the bridge between the loudspeakers and the rest of any sound system. In everyday parlance, ‘Audio Power Amplifier’ gets abbreviated to ‘amplifier’ or ‘amp’. But all audio power amplifiers (other than those that drive vinyl disc cutter-heads) are really ‘loudspeaker drivers’. The definition is global if earpieces and headphones are included.

Sometimes, amps are combined with the speakers, forming ‘powered speakers’; or they may be packaged with the preceding equipment functions, ...

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