Lokacin kunna kiɗa, yana da wuya a rufe dukkan tashoshin mita da lasifika ɗaya kawai saboda ƙarfin da iyakokin tsarin lasifika. Idan aka aika dukkan tashoshin mita kai tsaye zuwa ga mai tweeter, mid-mita, da woofer, "siginar da ta wuce gona da iri" da ke waje da amsawar mita na na'urar zai yi mummunan tasiri ga dawo da sigina a cikin tashoshin mita na yau da kullun, kuma yana iya lalata mai tweeter da mid-mita. Saboda haka, masu ƙira dole ne su raba tashoshin mita na sauti zuwa sassa da yawa kuma su yi amfani da lasifika daban-daban don kunna tashoshin mita daban-daban. Wannan shine asali da aikin haɗin gwiwa.

ThecrossoverHaka kuma shine "kwakwalwa" na mai magana, wanda ke taka muhimmiyar rawa a ingancin sauti. "Kwakwalwa" masu haɗuwa a cikin lasifikan amplifier suna da mahimmanci ga ingancin sauti. Fitowar sauti daga amplifier mai ƙarfi. Dole ne a sarrafa shi ta hanyar abubuwan tacewa a cikin haɗuwa don ba da damar siginar takamaiman mita na kowane naúra su wuce. Saboda haka, ta hanyar ƙira giciye mai magana ta hanyar kimiyya da hankali ne kawai za a iya gyara halaye daban-daban na na'urorin lasifika yadda ya kamata kuma a inganta haɗin don sa lasifika su yi laushi. Saki matsakaicin ƙarfin, yana sa amsawar mita na kowane mita mai santsi da kuma matakin hoton sauti daidai.

Daga ƙa'idar aiki, hanyar sadarwa ta matattara ce da ta ƙunshi capacitors da inductors. Tashar treble tana wucewa ne kawai da siginar mita mai yawa kuma tana toshe siginar ƙarancin mita; tashar bass akasin tashar treble ne; tashar tsakiyar zangon matattara ce ta band-pass wadda za ta iya wucewa ne kawai tsakanin maki biyu na crossover, ɗaya ƙasa ɗaya kuma babba.

Abubuwan da ke cikin crossover ɗin da ba a iya amfani da su ba sun ƙunshi L/C/R, wato, L inductor, C capacitor, da R resistor. Daga cikinsu, L inductance. Halayen shine toshe manyan mitoci, matuƙar ƙananan mitoci suna wucewa, don haka ana kiransa matatar low-pass; halayen C capacitor akasin inductance ne; R resistor ba shi da halayyar yanke mita, amma an yi niyya ne ga takamaiman maki na mitoci kuma Ana amfani da mitar don gyarawa, daidaita lanƙwasa, da ƙaruwa da raguwar hankali.

Asalin wanigiciye mara aiki hadadden tsari ne na da'irori masu tacewa masu yawa da kuma masu ƙarancin wucewa. Tsarin haɗakarwa masu wucewa suna da sauƙi, tare da ƙira daban-daban da hanyoyin samarwa. Zai sa haɗin gwiwar ya haifar da tasiri daban-daban a cikin lasifika.