Isihlanganisi samandla omsindo esihlanganisiwe kubhekiselwa kuso njengempumelelo esethiwe. Umsebenzi wesikhulisi esihlanganisiwe ukukhulisa amandla esignali kagesi ebuthakathaka ethunyelwe isekethe engaphambili, futhi kukhiqizwe amandla amakhulu anele ukushayela isipikha ukuqedela ukuguqulwa kwe-electro-acoustic. I-amplifier edidiyelwe isetshenziswa kabanzi kumasekhethi ahlukahlukene wokukhulisa amandla omsindo ngenxa yesekethe layo elilula lomngcele nokulungisa iphutha okulula.

Amasethi ajwayele ukusetshenziswa afaka i-LM386, TDA2030, LM1875, LM3886 namanye amamodeli. Amandla wokukhipha we-amplifier edidiyelwe asukela emakhulwini ama-milliwatts (mW) kuya kumakhulu ama-watts (W). Ngokuya ngamandla wokukhipha, ingahlukaniswa ngama-amplifiers amancane, aphakathi nendawo naphezulu; ngokuya ngesimo sokusebenza se-tube amplifier yamandla, ingahlukaniswa nge-Class A (A Class), Class B (Class B), Class A no-B (Class AB), Class C (Class C) kanye ne-Class D (Class D). Ama-amplifiers ka-Class A anokuhlanekezela okuncane, kepha ukusebenza kahle okuphansi, cishe ama-50%, nokulahleka kwamandla okukhulu. Ngokuvamile zisetshenziselwa izinto zasendlini ezisezingeni eliphezulu. Izikhulisi zamandla zeClass B zisebenza kahle kakhulu, cishe ngama-78%, kepha okubi ukuthi bathambekele ekuhlanekezelweni kwe-crossover. Ama-amplifiers we-Class A ne-B anezinzuzo zekhwalithi enhle yomsindo nokusebenza kahle kwama-amplifiers e-Class A, futhi asetshenziswa kakhulu ezinhlelweni zomsindo wasekhaya, ezobuchwepheshe, nezemoto. Zimbalwa izikhulisi zamandla ka-Class C ngoba iyisikhulisi samandla esinokuhlanekezela okuphezulu kakhulu, okufanele izinjongo zokuxhumana kuphela. Isikhulisi samandla esigaba Class D sibizwa nangokuthi i-digital power amplifier. Inzuzo ukuthi ukusebenza kahle kuphezulu kakhulu, ukunikezwa kwamandla kungancishiswa, futhi cishe akukho ukushisa okwenziwayo. Ngakho-ke, asikho isidingo serediyetha enkulu. Umthamo nekhwalithi yomzimba yehliswe kakhulu. Ngokwethiyori, ukuhlanekezelwa kuphansi futhi ukulingana kuhle. Umsebenzi walolu hlobo lwesikhulisi samandla uyinkimbinkimbi, futhi intengo ayishibhile.

Isikhulisi samandla kubhekiselwa kuso njengesikhulisi samandla kafushane, futhi inhloso yaso ukuhlinzeka umthwalo ngamandla amakhulu wedrayivu yamanje ukufeza ukukhulisa amandla. Isikhulisi samandla seClass D sisebenza esimweni sokucisha. Ngokwethiyori, ayidingi i-quiescent yamanje futhi isebenza kahle kakhulu.

Isiginali yokufaka yomsindo we-sine wave nesiginali engunxantathu enemvamisa ephakeme kakhulu kulungiswa ngumqhathanisi ukuthola isinali lokushintshashintsha kwe-PWM umjikelezo womsebenzi wakhe olingana nobukhulu besignali yokufaka. Isiginali yokushintshashintsha kwe-PWM ishayela ithubhu yamandla okukhipha ukuze isebenze esimweni sokucima. Ukuphela kokuphuma kwebhubhu kuthola isignali yokukhipha ngomjikelezo womsebenzi oqhubekayo. Ukuphakama kwesiginali yokukhipha kungamandla okuhambisa ugesi futhi inamandla wedrayivu yamanje. Ngemuva kokushintshashintsha kwesiginali, isignali ekhishwayo iqukethe isignali yokufaka kanye nezingxenye eziyisisekelo zegagasi lonxantathu elilungisiwe, kanye nama-harmoniki azo aphezulu kanye nenhlanganisela yawo. Ngemuva kokuhlunga kwe-LC ephasi ephansi, izingxenye zemvamisa ephezulu kusiginali yokukhipha ziyahlungwa, nesiginali yemvamisa esezingeni eliphansi enemvamisa efanayo ne-amplitude njengoba kutholwa isignali yoqobo yomthwalo kulayini.