Kwinkqubo yesandi, ukutsha kweyunithi yesithethi kuba buhlungu kakhulu kubasebenzisi besandi, nokuba kukwindawo ye-KTV, okanye kwindawo yebar kunye nendawo yokubonisa. Ngokwesiqhelo, imbono eqhelekileyo kukuba ukuba ivolumu ye-power amplifier iphakanyisiwe kakhulu, kulula ukuyitshisa isithethi. Enyanisweni, zininzi izizathu zokuba isithethi sitshiswe.
1. Uqwalaselo olungafanelekanga lweizithethikwayeizixhobo zokukhulisa amandla
Abahlobo abaninzi abadlala isandi baya kucinga ukuba amandla okukhupha esandisi-lizwi esikhulu kakhulu, nto leyo ebangela umonakalo kwisandisi-lizwi. Enyanisweni, akunjalo. Kwimicimbi yobungcali, isithethi ngokubanzi sinokumelana nokutshotshozwa okukhulu kwesignali kabini kunamandla alinganisiweyo, kwaye sinokumelana kathathu ngoko nangoko. Ukutshotshozwa okukhulu kabini kumandla alinganisiweyo ngaphandle kweengxaki. Ke ngoko, kunqabile kakhulu ukuba isandisi-lizwi sitshiswe ngamandla aphezulu esandisi-lizwi, kungekhona ngenxa yempembelelo enamandla engalindelekanga okanye ukubhomboloza kwexesha elide kwemakrofoni.
Xa isignali ingajikwanga, amandla ombane esignali egqithisileyo yexesha elifutshane awela kwi-woofer enamandla aphezulu, angadluli kumandla ombane wesithethi. Ngokubanzi, ayizukubangela ukuphambuka kokusasazwa kwamandla esipikha kwaye yonakalise iyunithi yesipikha. Ke ngoko, phantsi kweemeko eziqhelekileyo zokusetyenziswa, amandla okukhupha alinganisiweyo e-amplifier yamandla kufuneka abe ngokuphindwe ka-1--2 kumandla alinganisiweyo esipikha, ukuze kuqinisekiswe ukuba i-amplifier yamandla ayibangeli ukuphambuka xa kusetyenziswa amandla esipikha.
2. Ukusetyenziswa gwenxa kokwahlulwa kwamaza
Ukusetyenziswa gwenxa kwendawo yokwahlulahlula imvamisa yesiphelo sokufaka xa kusetyenziswa indawo yokwahlulahlula imvamisa yangaphandle, okanye indawo yokusebenza engafanelekanga yesithethi nayo yimbangela yomonakalo kwi-tweeter. Xa usebenzisa i-frequency divider, indawo yokwahlulahlula imvamisa kufuneka ikhethwe ngokungqongqo ngokwendawo yokusebenza yesithethi ebonelelwe ngumvelisi. Ukuba indawo yokwahlulahlula i-tweeter ikhethwe ukuba iphantsi kwaye umthwalo wamandla unzima kakhulu, kulula ukuyitshisa i-tweeter.
3. Uhlengahlengiso olungalunganga lwesilinganisi
Ukulungiswa kwe-equalizer nako kubalulekile. I-frequency equalizer imiselwe ukuhlawula iziphene ezahlukeneyo zentsimi yesandi sangaphakathi kunye neefrequencies ezingalinganiyo zezithethi, kwaye kufuneka ilungiswe nge-spectrum analyzer okanye ezinye izixhobo. Iimpawu ze-transmission frequency emva kokulungisa kufuneka zibe tyaba ngaphakathi koluhlu oluthile. Ii-tuner ezininzi ezingenalo ulwazi lwesandi zenza uhlengahlengiso ngokuthanda kwazo, kwaye abantu abaninzi baphakamisa iifrequencies eziphezulu kunye neefrequencies eziphantsi ze-equalizer phezulu kakhulu, zenze imo "ye-V". Ukuba ezi frequencies zonyuswe ngaphezu kwe-10dB xa kuthelekiswa nefriquencies ephakathi (ubungakanani bohlengahlengiso lwe-equalizer ngokubanzi yi-12dB), kungekuphela nje ukuphazamiseka kwesigaba okubangelwa yi-equalizer okuya kutshintsha kakhulu isandi somculo, kodwa kunokubangela ngokulula iyunithi ye-treble yesandi. Itshisiwe, olu hlobo lwemeko lukwangunobangela oyintloko wezithethi ezitshisiweyo.
- Uhlengahlengiso lwevolumu
Abasebenzisi abaninzi babeka i-attenuator ye-post-stage power amplifier kwi--6dB, -10dB, oko kukuthi, i-70%--80% yeqhosha levolumu, okanye nendawo eqhelekileyo, kwaye bonyusa igalelo lesigaba sangaphambili ukuze bafumane ivolumu efanelekileyo. Kucingelwa ukuba isithethi sikhuselekile ukuba kukho umda kwi-power amplifier. Enyanisweni, oku akulunganga. Iqhosha le-attenuation le-power amplifier linciphisa isignali yokufaka. Ukuba igalelo le-power amplifier lincitshiswe yi-6dB, kuthetha ukuba ukugcina ivolumu efanayo, isigaba sangaphambili kufuneka sikhuphe i-6dB ngaphezulu, i-voltage kufuneka iphindwe kabini, kwaye i-headroom ephezulu ye-dynamic ye-input, iya kunqunyulwa phakathi. Ngeli xesha, ukuba kukho isignali enkulu ngequbuliso, isiphumo siya kugcwala i-6dB kwangethuba, kwaye kuya kuvela i-waveform eqhotyoshiweyo. Nangona i-power amplifier ingagcwali kakhulu, igalelo liyi-waveform eqhotyoshiweyo, icandelo le-treble linzima kakhulu, kungekuphela nje i-treble ephosakeleyo, kodwa ne-tweeter inokutshisa.
Xa sisebenzisa imakrofoni, ukuba imakrofoni ikufutshane kakhulu nesithethi okanye ijonge kwisithethi, kwaye ivolumu ye-power amplifier ivuliwe kakhulu, kulula ukuvelisa impendulo yesandi esiphezulu kwaye ibangele ukubhomboloza, okuya kubangela ukuba i-tweeter itshise. Ngenxa yokuba uninzi lweempawu ze-midrange kunye ne-treble zithunyelwa kwiyunithi ye-treble emva kokudlula kwi-frequency divider, esi siginali samandla aphezulu sidlula kwiyunithi ye-treble nge-coil encinci kakhulu, ivelisa umbane omkhulu okhawulezileyo, obangela ubushushu obuphezulu obukhawulezileyo, kwaye ivuthela ucingo lwe-voice coil, i-tweeter yaphuka emva kokwenza isandi esithi "woo".
Indlela echanekileyo kukusebenzisa imakrofoni ingasondelanga okanye ingajonganga neyunithi yesithethi, kwaye amandla esandisi-lizwi samandla kufuneka anyuswe kancinci kancinci ukusuka kwincinci ukuya kwinkulu.isandisi-lizwiiya konakala ukuba ivolumu iphezulu kakhulu, kodwa imeko enokwenzeka kukuba amandla e-power amplifier awanelanga kwaye isandisi-lizwi sivuliwe kakhulu, ukuze ukuphuma kwe-power amplifier kungabi yi-sine wave eqhelekileyo, kodwa kube yisignali enezinye izinto ezidityanisiweyo, eziya kutshisa isithethi.
Ixesha lokuthumela: Novemba-14-2022