Kulula ngokwanele ukuthenga izingxenye ezintsha / ezishintshayo ze-stereo futhi uzibophe konke ukuze uthole imiphumela emnandi. Kodwa ingabe ucabanga ukuthi yini eyenza konke kuphazamise? Ama-amplifiers we-stereo angaba yingxenye ebalulekile ekusebenzeni okuhle komsindo.
Inhloso ye-amplifier ukuthola isignali encane kagesi bese uyikhulisa noma uyikhulise. Endabeni ye-pre-amplifier, isignali kumele ikhuliswe ngokwanele ukuze yamukelwe amandla amplifier . Endabeni yokukhulisa amandla , isignali kumele ikhuliswe kakhulu, ngokwanele ukunikeza i-loudspeaker. Nakuba ama-amplifiers ebonakala 'ibhokisi elimnyama' elingavamile, izimiso eziyisisekelo zokusebenza zilula. I-amplifier ithola isignali yokufaka emthonjeni (idivaysi yeselula, i-turntable, i-CD / i-DVD / isidlali semidiya, njll) futhi idala uphawu olukhulisiwe lwesignali encane yokuqala. Amandla adingekayo ukwenza lokhu avela ku-110-volt wall receptacle. Ama-amplifiers anokuxhumana okuyisisekelo okuyisisekelo: okuvela emthonjeni, okukhiphayo kuzikhulumi, nomthombo wamandla avela ku-110-volt ngodonga.
Amandla avela ku-110-volts athunyelwa esigabeni se-amplifier - eyaziwa ngokuthi ukunikezwa kwamandla - lapho kuguqulwa khona kusuka kushintsho olusukayo kuze kube manje . Amanje okuqondile anjengamandla athola amabhethri; ama-electron (noma ugesi) ugeleza kuphela ngendlela eyodwa. Ukungafani kwamanje kugeleza kuzo zombili izinkomba. Kusuka kubhethri noma ukunikezwa kwamandla, lamanje kagesi athunyelwa ekuphikisweni okuguquguqukayo - owaziwa nangokuthi i-transistor. I-transistor isisekelo se-valve (cabanga ngamanzi we-valve) ehlukahluka inani lamanje eligeleza ngesifunda esekelwe isignali yokufaka evela kumthombo.
Isignali esivela emthonjeni wokufakelwa yenza i-transistor inciphise noma iyanciphisa ukumelana kwayo, ngaleyo ndlela ivumele ukugeleza kwamanje. Inani lamanje elivunyelwe ukugeleza lisekelwe ebukhulu besignali kusuka kumthombo wokufaka. Isibonakaliso esikhulu senza ukuba okwamanje kube nokuhamba okuningi, okuholela ekukhuliseni okukhulu kwesignali encane. Ukuvama kwesignali yokufaka futhi kunquma ukuthi i-transistor isebenza kanjani ngokushesha. Isibonelo, ithoni elingu-100 Hz kusuka emthonjeni wokufakwayo lenza ukuthi i-transistor ivule futhi ivaliwe izikhathi ezingu-100 ngomzuzwana. Iphimbo elingu-1 Hz elivela emthonjeni wokufakelwa lenza ukuthi i-transistor ivulwe futhi ivale izikhathi ezingu-1 000 ngomzuzwana. Ngakho, i-transistor ilawula izinga (noma ubukhulu) kanye nemvamisa yamanje kagesi ethunyelwe kwisipikha, njenge-valve. Yileyo ndlela ifeza ngayo isenzo sokukhulisa.
Engeza i-potentiometer - eyaziwa nangokuthi ukulawula ivolumu - ohlelweni futhi une-amplifier. I-potentiometer ivumela umsebenzisi ukuba alawule inani lamanje eliya kuzikhulumi, okuthinta ngokuqondile izinga levolumu jikelele. Nakuba kunezinhlobonhlobo ezahlukene nezinklamo zama-amplifiers, wonke asebenza ngale ndlela efanayo.