I-amplifier yomsindo iyithuluzi elenza kabusha isignali yomsindo wokufaka entweni yokukhipha ekhiqiza umsindo. Ivolumu yesiginali eyakhiwe kabusha nezinga lamandla kufanele kube neqiniso elifanele, lisebenze futhi lihlanekezele kancane. Ububanzi bomsindo bucishe bube yi-20Hz kuye ku-20000Hz, ngakho-ke i-amplifier kufanele ibe nempendulo enhle yemvamisa kuleli banga (lincane uma ushayela isipikha esinqunyelwe imvamisa, njenge-woofer noma i-tweeter). Ngokuya ngesicelo, izinga lamandla lihluka kakhulu, kusukela ezingeni lama-milliwatt lamahedfoni kuya kuma-watts amaningana we-TV noma i-PC audio, kuya emashumini ama-watts we “mini” stereo yasekhaya nemisindo yemoto, kuya kumsindo wasekhaya nowokuthengisa onamandla amakhulu Uhlelo’Amakhulu ama-watts makhulu ngokwanele ukuhlangabezana nezidingo zomsindo wayo yonke i-cinema noma ihholo

Isikhulisi somsindo singenye yezinto ezibalulekile zemikhiqizo ye-multimedia futhi sisetshenziswa kakhulu emkhakheni we-electronics yabathengi. Izikhulisi zamandla alalelwayo eziqondile zihlale ziphethe imakethe yendabuko yokukhulisa umsindo ngenxa yokuhlanekezela kwayo okuphansi nekhwalithi yomsindo omuhle. Eminyakeni yamuva nje, ngokusakazwa kwamadivayisi we-multimedia aphathekayo njengeMP3, i-PDA, omakhalekhukhwini, namakhompiyutha ezincwajana, ukusebenza kahle kanye nevolumu yama-amplifiers kagesi ahlulekile ukuhlangabezana nezidingo zemakethe, ngenkathi izikhulisi zamandla ka-Class D seziya ngokuya zanda ithandwa ngokusebenza kahle kwawo okuphezulu nosayizi omncane. Umusa. Ngakho-ke, ama-amplifiers we-Class D asebenza kakhulu anenani lesicelo elibaluleke kakhulu namathemba emakethe.

Ukuthuthukiswa kwama-amplifiers alalelwayo kuhlangabezane nezikhathi ezintathu: i-electron tube (i-vacuum tube), i-bipolar transistor, ne-tube effect field. Isikhulisi se-tube audio sinomsindo ophansi, kepha sinamandla amakhulu, ukusetshenziswa kwamandla aphakeme, ayizinzile ngokweqile, futhi ayiphenduli kahle imvamisa ephezulu; i-bipolar transistor audio amplifier ine-wide frequency band, ububanzi obukhulu obunamandla, ukuthembeka okuphezulu, impilo ende, kanye nokuphendula okuvama kakhulu Okuhle, kepha ukusetshenziswa kwayo kwamandla we-static kanye nokumelana nakho kukhulu kakhulu, futhi ukusebenza kahle kunzima ukukuthuthukisa; i-amplifier yomsindo we-FET inethoni efanayo yokuncipha njengethubhu ye-elekthronikhi, futhi ububanzi bayo obunamandla bubanzi, futhi okubaluleke kakhulu, ukumelana kwayo kuncane, Kungafinyelela ukusebenza kahle okuphezulu.