Kwixesha lanamhlanjeiinkqubo zesandi,Ii-amplifier ngokungathandabuzekiyo zezinye zezona zinto zibalulekileyo. Ayichaphazeli nje kuphela umgangatho wesandi, kodwa ikwamisela ukusebenza ngokubanzi kunye namava omsebenzisi wenkqubo. Eli nqaku liza kujonga izinto eziphambili zeizixhobo zokukhulisa amandlaukukunceda uqonde ukuba kutheni ezi zinto zibaluleke kangaka.
1. Umbane ophumayo: Qhuba intliziyo yexilongo
Omnye wemisebenzi ephambili ye-amplifier kukubonelela ngamandla aneleyo okuqhuba isithethi. Ukuphuma kwamandla kumisela ukuba inkqubo yesandi inokugcina isandi esicacileyo nesingenasiphako kwiivolumu ezahlukeneyo. Ukuphuma kwamandla kwe-amplifier yamandla kudla ngokubonakaliswa ngee-watts (W). Ukukhetha i-amplifier yamandla efanelekileyo kufuna ukuqwalaselwa kwezi ngongoma zilandelayo:
Amandla esithethi alinganisiweyo: Amandla esandisi-lizwi kufuneka alingane namandla esithethi alinganisiweyo. Amandla amancinci kakhulu anokubangela ivolumu enganeleyo kunye nokuphazamiseka, ngelixa amandla amaninzi kakhulu angonakalisa isithethi.
Ubungakanani begumbi kunye nendawo evakalayo: Kumagumbi amakhulu okanye kwiindawo apho isandi singangeni kakuhle khona, kufuneka izixhobo zokukhulisa umsindo ezinamandla aphezulu ukuqinisekisa ukuba isandi sigqunywe ngendlela efanayo necacileyo.
Uhlobo lomculo kunye nemikhwa yokumamela: Abasebenzisi abakonwabela ukumamela umculo okwizinga eliphezulu banokufuna ii-amplifiers ezinamandla aphezulu ukugcina iinkcukacha kunye nokuguquguquka komculo kumthamo ophezulu.
2. Ukuguqulwa kwesandi: Umbulali ongabonakaliyo womgangatho wesandi
Ukuphambuka yenye yezona zinto zibalulekileyo zokuvavanya umgangatho wee-amplifiers zamandla. Kubhekisa kuzo naziphi na utshintsho olungeyomfuneko kwisignali yokufaka ngexesha lenkqubo yokwandisa. Kukho ikakhulu ezi ntlobo zilandelayo zokuphambuka:
Ukuphazamiseka kweHarmonic: Ukuphindaphinda okwenziwa ngexesha lokwandiswa kwesignali. Oku kuphazamiseka kunokwenza isandi singabi semvelo kwaye kuchaphazele umgangatho wesandi.
Ukuphazamiseka kwe-inter-modulation: i-frequency entsha eveliswayo xa imiqondiso yee-frequency ezahlukeneyo ixutywa kwi-amplifier, nto leyo enokukhokelela kwiithoni ezingafunekiyo kwisignali yesandi.
Ukuphazamiseka kwe-Trans-conductance: Ubudlelwane obungenamgca phakathi kwemveliso ye-amplifier yamandla kunye nesignali yokufaka, edla ngokwenzeka ngexesha lokugqithisa kakhulu.
Uyilo oluhle kakhulu lwe-amplifier luya kunciphisa oku kuphazamiseka kwaye lubonelele ngomgangatho wesandi ocacileyo nowendalo.
3. Impendulo ephindaphindwayo: Ukubuyisela ububanzi nobunzulu besandi
Impendulo yefrikhwensi ibhekisa kuluhlu lwefrikhwensi olunokwandiswa ngempumelelo yi-power amplifier, oluhlala lulinganiswa ngeHertz (Hz). I-amplifier efanelekileyo kufuneka ibonelele ngokwandiswa okugudileyo nokulinganayo kuyo yonke i-audio spectrum (ngesiqhelo ukusuka kwi-20Hz ukuya kwi-20kHz). Ibhalansi yempendulo yefrikhwensi ichaphazela ngokuthe ngqo isiphumo sokubuyiselwa kwesandi:
Impendulo ephindaphindayo ephantsi: ichaphazela ubunzulu kunye nempembelelo ye-bass. Ii-amplifier ezinempendulo entle ephindaphindayo ephantsi zinokubonelela ngemiphumo enamandla ye-bass.
Impendulo ephakathi kwesandi: ikakhulu ichaphazela ukusebenza kwezandi kunye nezixhobo zomculo, kwaye yinxalenye ephambili yomgangatho wesandi.
Impendulo yefrikhwensi ephezulu: Ichaphazela ukucaca nokusebenza kweenkcukacha zeenowuthi eziphezulu, kwaye i-amplifier enamandla enempendulo entle yefrikhwensi ephezulu ingenza isandi sibe sobala ngakumbi kwaye sibe sengqiqweni.
4. Umlinganiselo wesignali kwingxolo (SNR): isiqinisekiso somgangatho wesandi ococekileyo
Umlinganiselo weSignali kwiNgxolo luphawu olulinganisa umlinganiselo phakathi kwesignali eluncedo kunye nengxolo kwisignali yokuphuma kwe-amplifier yamandla, edla ngokubonakaliswa ngee-decibels (dB). Umlinganiselo ophezulu wesignali-kwingxolo uthetha ukuba i-amplifier yamandla ivelisa ingxolo encinci yangasemva xa ikhulisa isignali, iqinisekisa ubunyulu bomgangatho wesandi. Ukukhetha i-amplifier yamandla enomlinganiselo ophezulu wesignali-kwingxolo kunokunciphisa ukuphazamiseka kokuva kwaye kubonelele ngamava okumamela anzulu ngakumbi.
5. Uyilo lwesekethe yee-amplifier zamandla: isiseko sokumisela ukusebenza
Uyilo lwesekethe yangaphakathi ye-power amplifier luchaphazela ngokuthe ngqo ukusebenza kwayo kunye nomgangatho wesandi. Kukho uyilo lweesekethe ezahlukeneyo eziqhelekileyo:
I-amplifier yeKlasi A: Ngomgangatho wesandi ogqwesileyo kodwa ukusebenza kwayo kuphantsi, ifanelekile kwiinkqubo zesandi eziphezulu ezilandela umgangatho wesandi ogqwesileyo.
I-amplifier yeKlasi B: Ukusebenza kakuhle kodwa ukuphazamiseka okukhulu, okusetyenziswa rhoqo kwiinkqubo zesandi eziphakathi ukuya kwezisezantsi.
I-amplifier yeKlasi ye-AB: Idibanisa iingenelo zeKlasi A kunye neKlasi B, kunye nokusebenza kakuhle kunye nomgangatho wesandi olungileyo, kwaye okwangoku luyilo lwe-amplifier oluphambili.
I-amplifier yeKlasi D: Ngobuchule obuphezulu kunye nobukhulu obuncinci, ifanelekile kwizixhobo eziphathwayo kunye neenkqubo zanamhlanje zemidlalo yeqonga yasekhaya.
Uyilo ngalunye lwesekethe luneengenelo kunye neengxaki zalo, kwaye ukukhetha uhlobo lwe-amplifier olufanela iimfuno zakho kubalulekile.
6. Imisebenzi kunye neendlela zokunxibelelana kwee-amplifier zamandla: ukuhlangabezana neemfuno ezahlukeneyo
Ii-amplifier zanamhlanje azifuni nje kuphela umgangatho wesandi ogqwesileyo, kodwa zikwafuna ukubonelela ngemisebenzi etyebileyo kunye neendlela zokunxibelelana ukuze zilungele iimeko ezahlukeneyo zokusetyenziswa. Umzekelo:
Ii-interfaces ezininzi zokufaka, ezifana ne-RCA, i-fiber optic, i-coaxial, i-HDMI, njl.njl., zinceda uqhagamshelo lwezixhobo ezahlukeneyo zomthombo wesandi.
Uqhagamshelo olungenazingcingo: olufana neBluetooth kunye neWiFi, olulungele ukudityaniswa nezixhobo eziphathwayo kunyeiinkqubo zasekhaya ezikrelekrele.
Inkxaso yeziteshi ezininzi: ifanelekileiinkqubo zemidlalo yeqonga yasekhaya, enika amava esandi anomdla ngakumbi.
Ukukhetha i-amplifier egqwesileyo kufuna ukuqwalaselwa ngokupheleleyo kwezinto ezifana nokukhupha amandla, ukuphazamiseka, impendulo yefrikhwensi, umlinganiselo wesignali-kwingxolo, uyilo lwesekethe, ukusebenza, kunye neendawo zokunxibelelana. Kuphela ngale ndlela esinokuqinisekisa ukusebenza okungcono kunye namava omsebenzisi wenkqubo yesandi. Nokuba ungumthandi womculo okanye umthandi wethiyetha yasekhaya, ukuqonda nokunika ingqalelo kwezi zinto zibalulekileyo kuya kukunceda ukhethe isixhobo se-amplifier esikufaneleyo, okwenza amava onke okumamela abe mnandi.
Ixesha leposi: Juni-06-2024