Amplifier amandla okuphuma ngenye yezona zinto zibaluleke kakhulu ekukhetheni i-stereo amplifier okanye i-receiver. Amandla alinganiswa kumatts (W) kwisiteji ngasinye, kwaye isigqibo malunga nokuba namandla afunekayo kufuneka axhomekeke kwiimpawu ezimbalwa. Cinga ukhetho / iintlobo zezivakalisi oceba ukuzisebenzisa, ubungakanani kunye neempawu zomculo ze-intetho ekuthethwa ngazo, kunye nokuphakama okukhulu (kunye nomgangatho) womculo ofuna ukuyidlala.
Umgaqo oqhelekileyo wesohlwayo kukuba kufuneka uhambelane neemfuno zamandla zezivakalisi kunye nombane wokuvelisa we-amplifier / receiver. Uzakufuna ukuqinisekisa ukuba amandla afana nokulinganisa imiphefumlo kwisithethi ngasinye. Gcina ukhumbule ukuba ezinye izithethi zidinga amandla angaphezulu okanye angaphantsi kwamanye - uvelwano lwentetho ye-loudspeaker lubonakaliswa kwi- decibels (dB), enomlinganiselo wokuveliswa kwemveliso engakanani kunye nenani elithile le-amplifier . Ngokomzekelo, isithethi esinengqondo esezantsi (ithi, i-88 ukuya ku-93 dB) idinga ukufuna amandla angaphezulu kwe-amplifier ngaphezu kwesithethi enobukhulu obuphezulu (94 ukuya ku-100 dB okanye ngaphezulu) ukuze udlale kwaye uvale kakhulu kwizinga elifanayo levolumu .
Ukuveliswa kwamandla kunye nomthamo wesithethi akukho ulwalamano oluhambelanayo! Ukutshitshiswa kwe-amplifier / amandla okwamkeli angeke kuphindwe kabini ukuba umculo uzwakala kangakanani (inqaku: li-logarithmic). Umzekelo, i-amplifier / i-receiver ene-100 W nganye ngeklayini ayiyi kudlala ngokuphindwe kabini ngelizwi elikhulu njengomkhulisi / umkeli we-50 W kwisitishi usebenzisa izithethi ezifanayo. Kwimeko enjalo, ulwahlulo olubalulekileyo ekuphakameni okukhulu lwaluya kuphakama kancinci - utshintsho lu-3 dB kuphela. Kuthatha ukwanda kwe-10 dB ukwenzela ukuba izithethi zidlale ngokuphindwe kabini ngelizwi eliphambili njengoko ngaphambili (ukunyuka kwe-1 DB kwakungeke kuqondwe). Kunoko, ukuba namandla okwandisa amandla avumela inkqubo ukuba ilandele iindawo ezivakalayo zomculo ngokukhululeka kunye nobunzima obuncinane, obangela ukucacileyo okucacileyo ngokubanzi. Kukho ncinane ingqalelo kwintononongo yomsindo ukuba amandla amaninzi adala izithethi ukuba ziphazamise kwaye zandile
Yingakho kulungile ukukwazi kwakhona iinkcukacha zezivakalisi oceba ukuyisebenzisa. Abanye kufuneka basebenze kancinci kunabanye ukuze bafezekise imveliso yevolumu efunwayo. Esinye isakhethi sakhiwo sisebenza ngokugqithiseleyo kunabanye kwi-sounding sound kwiindawo ezivulekileyo. Ukuba igumbi lokuphulaphula lincinci kwaye / okanye lithwala kakuhle i-audio, enye ingenayo imfuneko yokuba i-amplifier / i-receiver enegunya elinamandla, ingakumbi ngeentetho ezithintela ngamandla. Amagumbi amakhulu kunye / okanye imilaphu enkulu yokuphulaphula kunye / okanye izithethi ezincinci ziyakufuna ngamandla amaninzi ukusuka kumthombo.
Xa kuthelekiswa nokuveliswa kwamandla kwezixhobo ezahlukeneyo zokufumana izixhobo / kubamkeli, kubalulekile ukuqonda umahluko phakathi kweentlobo zomlinganiselo. Umlinganiselo oqhelekileyo wamandla yiRMS (i-Root Mean Square), kodwa abavelisi banokubonelela ngemilinganiselo yamandla amakhulu. Ixesha langaphambili libonisa ukuveliswa kwamandla okuqhubekayo kwixesha lexesha, ngelixa ekugqibeleni kubonisa ukuveliswa kwemiphumo emfutshane. Iinkcazo zeSomlomo zingabhala kwakhona amandla okutyunjwa (oko kunokusingatha ixesha elingaphezulu kwexesha) kunye namandla angqongqo (oko kunokusingatha ngokukhawuleza okufutshane), okufuneka ukuba iqwalaselwe ngenyameko kwaye ifaniswe. Awufuni ukudayela i-amplifier / i-receiver phezulu kakhulu ukwenzela ukuba umonakalise yona okanye nayiphina isistim esixhunyiwe, kuquka iintetho.
Qinisekisa ukuthelekisa ixabiso elifanayo kwicala phambi kokuba wenze isigqibo sokugqibela. Kwakhona uyazi ukuba abanye abakhiqizi banokufakela inkcazo ngokumisela amandla ngelixa linye, bathi 1 kHz, kunokuba kukho uluhlu olubanzi lwee-frequency, ezifana ne-Hz ukuya kwi-20 kHz. Ngokwenxalenye enkulu, awukwazi ukuhamba ngokungahambi kakuhle ngamandla akho kunokuba awukho, nangona ungacwangcanga kumculo oqhumayo kumanqanaba afana nekonsathi kumagumbi. Amaplifiers / abamkeliyo abaneemilinganiselo zamandla aphakamileyo bangakwazi ukuhambisa ngaphandle kokufuna ukunyanzeliswa kwimida ephezulu, okuya kugcina ukuphazamiseka kunye nekhwalithi yomsindo phezulu.