Mukamayimba nyimbo, zimakhala zovuta kuphimba ma frequency band onse ndi sipika imodzi yokha chifukwa cha mphamvu ndi zofooka za sipika. Ngati frequency band yonse yatumizidwa mwachindunji ku tweeter, mid-frequency, ndi woofer, "signal yochulukirapo" yomwe ili kunja kwa frequency response ya chipangizocho idzakhudza kwambiri kuchira kwa ma signal mu frequency band yanthawi zonse, ndipo ikhoza kuwononga tweeter ndi mid-frequency. Chifukwa chake, opanga ayenera kugawa ma audio frequency band m'magawo angapo ndikugwiritsa ntchito ma speaker osiyanasiyana kuti azisewera ma frequency band osiyanasiyana. Ichi ndi chiyambi ndi ntchito ya crossover.

ThecrossoverNdi "ubongo" wa wokamba nkhani, womwe umagwira ntchito yofunika kwambiri pa khalidwe la mawu. "Ubongo" wozungulira mu okamba nkhani za amplifier ndi wofunikira kwambiri pa khalidwe la mawu. Kutulutsa mawu kuchokera ku amplifier yamphamvu. Iyenera kukonzedwa ndi zigawo zosefera mu crossover kuti zizindikiro za ma frequency enaake a unit iliyonse zidutse. Chifukwa chake, pokhapokha mwa kupanga mwanzeru komanso mwanzeru crossover ya wokamba nkhani, makhalidwe osiyanasiyana a mayunitsi a wokamba nkhani angasinthidwe bwino ndi kuphatikizana kuti apange okamba nkhani. Tsegulani mphamvu yayikulu, ndikupangitsa kuti ma frequency response a frequency band iliyonse ikhale yosalala komanso gawo la chithunzi cha mawu likhale lolondola.

Kuchokera pa mfundo yogwirira ntchito, crossover ndi netiweki yosefera yopangidwa ndi ma capacitor ndi ma inductor. Njira ya treble imangopereka ma signal a high-frequency ndikutseka ma signal a low-frequency; njira ya bass ndi yosiyana ndi njira ya treble; njira yapakati ndi fyuluta ya band-pass yomwe imatha kungopereka ma frequency pakati pa mfundo ziwiri za crossover, imodzi yotsika ndi ina yokwera.

Zigawo za passive crossover zimapangidwa ndi L/C/R, kutanthauza L inductor, C capacitor, ndi R resistor. Pakati pawo, L inductance. Khalidwe lake ndi kuletsa ma frequency apamwamba, bola ma frequency otsika akadutsa, kotero amatchedwanso low-pass filter; makhalidwe a C capacitor ndi osiyana ndi inductance; R resistor ilibe khalidwe la cutting frequency, koma imayang'ana pa ma frequency enaake ndipo frequency band imagwiritsidwa ntchito pokonza, equalization curve, ndi sensitivity ikukula ndi kuchepa.

Chiyambi chakusinthasintha kosachitapo kanthu ndi chovuta cha ma circuit angapo osinthira mawu apamwamba komanso otsika. Ma crossover osasinthika amawoneka osavuta, okhala ndi mapangidwe osiyanasiyana ndi njira zopangira. Zimapangitsa kuti crossover ipange zotsatira zosiyanasiyana m'ma speaker.