Editing Audio power amplifier (section)

== Applications ==
[[File:Pyle Power Amplifier.jpg|thumb|Pyle two-channel power amplifier]]
[[File:Rear panel of mixing console and amplifiers at concert of band 'Dead Can Dance' in Barcelona, May 2022.jpg|thumb|Rear panel of a medium-sized [[sound reinforcement system]] located at one side of the stage at a pop concert. The setup includes the [[mixing console]] for the [[sound engineer]] (standing behind) and the power amplifiers which are partly stacked in a 19-inch rack on the right.]]

Important applications include [[public address]] systems, theatrical and concert [[sound reinforcement system]]s, and domestic systems such as a [[High fidelity|stereo]] or [[Home cinema|home-theatre system]]. [[Instrument amplifier]]s including [[guitar amplifier]]s and electric [[keyboard amplifier]]s also use audio power amplifiers. In some cases, the power amplifier for an instrument amplifier is integrated into a single amplifier "head" which contains a preamplifier, tone controls, and electronic effects. These components may be mounted in a wooden speaker cabinet to create a "combo amplifier". Musicians with unique performance needs and/or a need for very powerful amplification may create a custom setup with separate [[rackmount]] preamplifiers, equalizers, and a power amplifier mounted in a 19" [[road case]].

Power amplifiers are available in standalone units, which are used by [[hi-fi]] audio enthusiasts and designers of [[public address system]]s (PA systems) and [[sound reinforcement system]]s. A hi-fi user of power amplifiers may have a stereo power amplifier to drive left and right speakers and a single-channel (mono) power amplifier to drive a [[subwoofer]]. The number of power amplifiers used in a sound reinforcement setting depends on the size of the venue. A small [[coffeehouse]] may have a single power amp driving two PA speakers. A [[nightclub]] may have several power amps for the main speakers, one or more power amps for the [[Foldback (sound engineering)|monitor speakers]] (pointing towards the band) and an additional power amp for the subwoofer. A stadium concert may have a large number of power amps mounted in racks. Most [[consumer electronics]] sound products, such as [[TV]]s, [[boom box]]es, [[home cinema]] sound systems, Casio and Yamaha [[electronic keyboard]]s, [[guitar amplifier|"combo" guitar amps]] and car stereos have power amplifiers integrated inside the chassis of the main product.