Thaum ua si suab paj nruag, nws nyuaj rau npog tag nrho cov zaus bands nrog tsuas yog ib lub hais lus vim yog lub peev xwm thiab cov kev txwv ntawm cov qauv ntawm lub hais lus. Yog tias tag nrho cov zaus band raug xa ncaj qha mus rau lub tweeter, nruab nrab zaus, thiab woofer, "cov teeb liab ntau dhau" uas nyob sab nraum qhov teb zaus ntawm lub unit yuav cuam tshuam tsis zoo rau kev rov qab teeb liab hauv cov zaus band, thiab tej zaum yuav ua rau lub tweeter thiab nruab nrab zaus puas tsuaj. Yog li ntawd, cov neeg tsim qauv yuav tsum faib cov zaus suab band ua ntau ntu thiab siv cov neeg hais lus sib txawv los ua si cov zaus bands sib txawv. Qhov no yog keeb kwm thiab kev ua haujlwm ntawm crossover.

Lubcrosoverkuj yog "lub hlwb" ntawm tus neeg hais lus, uas ua lub luag haujlwm tseem ceeb hauv qhov zoo ntawm lub suab zoo. Lub crossover "lub hlwb" hauv cov neeg hais lus amplifier yog qhov tseem ceeb rau lub suab zoo. Lub suab tso tawm los ntawm lub zog amplifier. Nws yuav tsum tau ua tiav los ntawm cov khoom lim hauv crossover kom tso cai rau cov teeb liab ntawm cov zaus tshwj xeeb ntawm txhua chav tsev hla. Yog li ntawd, tsuas yog los ntawm kev tsim qauv thiab kev xav ntawm tus neeg hais lus crossover thiaj li tuaj yeem hloov kho cov yam ntxwv sib txawv ntawm cov chav hais lus tau zoo thiab kev sib xyaw ua ke kom ua rau cov neeg hais lus. Tso tawm lub peev xwm siab tshaj plaws, ua rau cov lus teb zaus ntawm txhua qhov zaus du thiab lub suab duab theem raug.

Los ntawm txoj cai ua haujlwm, qhov crossover yog lub network lim dej uas muaj cov capacitors thiab inductors. Lub treble channel tsuas yog hla cov teeb liab siab thiab thaiv cov teeb liab qis; lub bass channel yog qhov sib txawv ntawm treble channel; lub mid-range channel yog lub lim dej band-pass uas tsuas yog hla cov zaus ntawm ob lub crossover points, ib qho qis thiab ib qho siab.

Cov khoom ntawm passive crossover yog tsim los ntawm L / C / R, uas yog, L inductor, C capacitor, thiab R resistor. Ntawm lawv, L inductance. Lub yam ntxwv yog los thaiv cov zaus siab dua, tsuav yog cov zaus qis dua dhau mus, yog li nws tseem hu ua lim dej qis-pass; cov yam ntxwv ntawm C capacitor tsuas yog qhov sib txawv ntawm inductance; R resistor tsis muaj lub yam ntxwv ntawm kev txiav zaus, tab sis yog tsom rau cov ntsiab lus zaus tshwj xeeb thiab Lub zaus band yog siv rau kev kho, kev sib npaug nkhaus, thiab kev nce thiab txo qis rhiab heev.

Lub ntsiab lus ntawm ibpassive crossover yog ib qho kev sib xyaw ua ke ntawm ntau lub voj voog lim dej siab thiab qis dhau. Cov kev hla dhau tsis zoo li yooj yim, nrog rau cov qauv tsim thiab cov txheej txheem tsim khoom sib txawv. Nws yuav ua rau cov kev hla dhau tsim cov teebmeem sib txawv hauv cov neeg hais lus.