Audio power amplifier: Difference between revisions

Revision as of 23:00, 3 June 2011

Revision as of 08:37, 4 June 2011

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Key design parameters for audio amplifiers are [[frequency response]], [[gain]], [[signal noise|noise]], and [[distortion]]. These are interdependent; increasing gain often leads to undesirable increases in noise and distortion. While [[negative feedback]] actually reduces the gain, it also reduces distortion. Most audio amplifiers are linear amplifiers operating in [[class AB]].

==Audio Power amplifiers==

See also: [[Electronic amplifier#Power amplifier|Electronic power amplifiers]] and [[Valve audio amplifier]] and [[Push-pull output]].

These include [[Guitar amplifiers]].

==Filters and preamplifiers==

Since modern digital devices, including CD and DVD players, radio receivers and tape decks already provide a "flat" signal at line level (enopuh to directly drive power amplifiers), the preamp is not needed other than as a volume control and signal source selector. One alternative to a separate preamp is to simply use passive volume and switching controls, sometimes(a ''passive preamp''). Sometimes the controls are integrated into a power amplifier to form an ''integrated amplifier''.

==Further developments in amplifier design==