Isithethi saziwa kakhulu ngokuba yi "horn", luhlobo lwe-electroacoustic transducer kwizixhobo zesandi, ngokulula nje, kukubeka i-bass kunye ne-loudspeaker ebhokisini. Kodwa njengoko kuphuhliswa isayensi kunye netekhnoloji, uyilo lwesandi ngenxa yokuphuculwa kwezinto, umgangatho wecandelo elifana nesandi kunye nesithethi selizwi eliphezulu uyaphucuka ngokucacileyo, ibhokisi yesithethi yongeza umsebenzi omtsha, kwaye inesiphumo esikhulu nesingcono.
Kwiminyaka yakutshanje, imfuno yeenkqubo zenethiwekhi yesandi ibikhula, kwaye ngokuguqulwa kwezinto ze-elektroniki zangaphakathi, abathengisi abaninzi beenkqubo zesandi badibanise itekhnoloji yenethiwekhi yesandi kwizixhobo zesandi, okwenza izithethi zibe nobuchule ngakumbi.
Ukongeza kwiinkqubo zenethiwekhi yesandi, uninzi lwee-stereo ngoku ziqulathe ezinye izinto ze-elektroniki kunye neeprosesa zesignali zedijithali, ukuqinisekisa ukuba isithethi ngasinye sinokulungiswa ukuze kubonelelwe ngesandi esifanelekileyo kwindawo egutyungelweyo kunye nendawo yonke. Ulawulo lwe-beam, umzekelo, lusebenzisa iteknoloji yolawulo lwedijithali ukulawula ukusasazwa kwesandi, okuvumela umyili ukuba adibanise iziphumo zee-drive ezininzi (ngesiqhelo kwisandi sekholamu) ukuqinisekisa ukuba isandi sihanjiswa kuphela apho umyili afuna sifike khona. Le ndlela izisa inzuzo enkulu ye-acoustic kwiindawo ezinzima zokuphefumla ezifana nezikhululo zeenqwelo-moya kunye neecawa ngokususa imithombo yesandi kude neendawo ezibonisiweyo.
Malunga noyilo lwangaphandle
Enye yezona ngongoma ziphambili zoyilo lwesandi yindlela yokulungelelanisa isandi noyilo lwangaphakathi okanye isitayile soyilo lwendawo yokusebenza, ngaphandle kokubangela umonakalo kwizinto zoyilo lokuqala. Kwiminyaka yakutshanje, ubuchwepheshe bezixhobo zokuvelisa isandi buphuculwe, kwaye imagnethi enkulu nenzima ye-ferrite ithatyathelwe indawo ziintsimbi zomhlaba ezincinci nezikhaphukhaphu ezinqabileyo, okwenza uyilo lwemveliso lube ncinci ngakumbi kwaye imigca ibe mihle ngakumbi nangakumbi. Ezi zithethi azisayi kungqubana noyilo lwangaphakathi kwaye zisenokukwazi ukubonelela ngenqanaba loxinzelelo lwesandi kunye nokucaca okufunekayo kuyilo lwe-acoustic.