Amandla okukhipha amplifier ingenye yezinto ezibaluleke kakhulu ekukhetheni i-stereo amplifier noma i-receiver. Amandla alinganiswa ku-Watts (W) ngesiteshi ngasinye, futhi isinqumo sokuthi amandla ambalwa okudingayo kufanele asekelwe ezinkambisweni ezimbalwa. Cabanga ngokukhethwa / izinhlobo zezikhulumi ozihlose ukusebenzisa, ubukhulu nezici ze-acoustic ekamelweni lokulalela okukhulunywe ngalo, nokuphakama komculo okufunayo (nekhwalithi) oyifunayo.
Umthetho ojwayelekile wesithupha uwukuthi kufanele ufanisane nezidingo zamandla zezikhulumi ngombuso ophumayo we-amplifier / receiver. Uzofuna ukuqinisekisa ukuthi amandla afana nesilinganiselo se-impedance ngayinye yezikhulumi. Khumbula ukuthi ezinye izikhulumi zidinga amandla angaphezulu kunamanye - ukuzwela kwezwi-loudspeaker kuboniswa ngama- decibel (dB), okuyisilinganiso sokukhishwa komsindo okungakanani okukhiqizwa ngenani elibekiwe le-amplifier amandla . Isibonelo, isikhulumi esinomzwelo ophansi (uthi, 88 kuya ku-93 dB) sivame ukufuna amandla angaphezulu okukhulisa amandla kunesikhulumi esinomzwelo ophakeme (94 kuya ku-100 dB noma ngaphezulu) ukuze udlale futhi uzwakale kahle ngezinga elifanayo levolumu .
Umthamo wokukhipha amandla nesiphakamisi akuyona ubuhlobo obuhambisanayo! Ukuphazamisa amandla okukhulisa / okuthola amandla angeke kuphindwe kabili ukuthi umculo uzwakala kangakanani (ukusikisela: kungu-logarithmic). Isibonelo, i-amplifier / i-receiver ene-100 W isiteshi ngasinye ngeke idlale kabili ngokuzwakalayo njenge-amplifier / isamukeli nge-50 W ngesiteshi ngokusebenzisa izikhulumi ezifanayo. Esimweni esinjalo, umehluko wangempela ekuphakameni okukhulu kuzoba ngaphezulu kakhulu - ushintsho luyi-3 dB kuphela. Kuthatha ukwanda kwe-10 dB ukuze wenze izikhulumi zidlale kabili ngokuzwakalayo njengangaphambili (ukukhuphuka okungu-1 kweBB kungabonakali kalula). Esikhundleni salokho, amandla amaningi okukhulisa amavumela ukuthi uhlelo lukwazi ukubhekana nezintaba zomculo ngokukhululeka nokunciphisa okuncane, okwenza kube lula ukucaca umsindo ozwakalayo. Kukhona iphuzu elincane lokuzijabulisa komsindo uma amandla amaningi kakhulu enza ukuba izikhulumi ziphazamise futhi zizwakale zimbi.m
Yingakho kulungile ukwazi futhi imininingwane yezikhulumi ozihlela ukuyisebenzisa. Abanye kufanele basebenze kanzima kunabanye ukuze bafinyelele ukukhishwa kwevolumu oyifunayo. Ezinye izinkomba zesikhulumi ziphumelela kakhulu kunabanye ekupheni umsindo ngokulinganayo kuzo zonke izikhala ezivulekile. Uma igumbi lokulalela lincane futhi / noma liphethe kahle umsindo, omunye angase adinge amandla amplifier / receiver enamandla kakhulu, ikakhulukazi nezikhulumi ezizwela amandla. Kodwa amakamelo amakhulu kanye / noma amabanga amakhulu okulalela kanye / noma izikhulumi ezibucayi ezithintekayo ngokuqinisekile zizodinga amandla amaningi emithonjeni.
Uma kuqhathaniswa ukukhishwa kwamandla kwabaningi abakhulu / abalamukeli, kubalulekile ukuqonda umehluko phakathi kwezinhlobo zokulinganisa. Isilinganiso esivamile kakhulu samandla i-RMS (i-Root Mean Square), kodwa abakhiqizi bangahlinzeka ngamanani wamandla angaphezulu. I-yangaphambili ibonisa ukuqhutshwa kwamandla okuqhubekayo ngokuhamba kwesikhathi, kuyilapho lesi sibonakaliso sibonisa ukukhishwa okuncane. Ukucaciswa kwesitatimende kungabuye kubhale amandla okuqamba (ukuthi yini engayisingatha ngaphezu kwesikhathi esithile) kanye namandla amakhulu (ukuthi angabhekana kanjani ngama-short bursts), okufanele ahlolwe ngokucophelela futhi afanelane. Awufuni ukudayela i-amplifier / receiver phezulu kakhulu ukuze uzilimaze noma uqobo noma imishini ehlangene, kuhlanganise nezikhulumi.
Qinisekisa ukuthi uqhathanisa amanani afanayo eceleni ngaphambi kokwenza isinqumo sokugcina. Yazi futhi ukuthi abanye abakhiqizi bangakwazi ukufaka ukucaciswa ngamandla ngokulinganisa emvamisa owodwa, bathi 1 kHz, kunokuba lonke ibanga lemvamisa, njenge-Hz 20 kuya ku-20 kHz. Ngokuyinhloko, awukwazi ukungalungile ngokuthola amandla amaningi kunakho, ngisho noma ungahle uhlele umculo wokuqothula kumazinga afana nekhonsathi emakamelweni. Ama-amplifiers / abamukeli abanezilinganiso eziphezulu zamandla angathumela ngaphandle kokudinga ukuqhutshelwa emkhawulweni omkhulu wokukhipha, okuzoqhubeka ukuphazamisa phansi kanye nekhwalithi yomsindo phezulu.