Crossover rau hais lus - dab tsi yog nws thiab yog vim li cas yog

Thaum txhim kho ib tug niaj hnub tso suab system nyob rau hauv lub tsheb tswv muaj los khaws cov tseeb crossover. Qhov no kev xaiv yog yooj yim heev yog tias koj paub thiab to taub dab tsi yog thiab zoo li cas yog npaj, thiab raws li ib feem ntawm ib tug system ntawm no ntaus ntawv yuav ua hauj lwm. Yog li ntawd, cia saib dab tsi hauv lub crossover rau tus tham.

Cov yam ntxwv, lub hom phiaj

Crossover - yog tshwj xeeb cov khoom nkag hais lus system, lub ntsiab muaj nuj nqi uas yog los ua tus yam zaus band rau txhua cov lus qhia. Raws li yog lub npe hu, tej lus qhia system tsim kom tau ib hom hauj lwm frequencies. tso zis teeb liab, yog noj mus rau ib tug sab ntawm ntau yam tej zaum yuav ua rau ib tug distortion ntawm lub suab. Yog li ntawd, yog tias koj thov kev pab rau ib tug hais lus zaus muaj tsawg tsawg heev rau nws, ces lub suab daim duab yuav tsum distorted. Yog hais tias lub zaus yog siab dhau heev lawm, ces tus tswv ntawm lub system yuav tau mus fim tsis tau tsuas yog ib tug distorted suab, tab sis nrog lub tsis ua hauj lwm ntawm lub high-dynamo. Xeem tsuas yog tsis tau mus ntxiv xws li ib tug hom kev lag luam.

Nyob rau hauv tej yam tshwm sim, cov kev ua ntawm high-zaus hais lus - ua si suab tsuas yog nyob rau siab frequencies. Tsawg zaus acoustic tshuab khiav lag luam nyias. Tej zaum txawm tsim nyob rau hauv ntau qhov chaw ntawm tus neeg nrog caij compartment. Yam muaj tseeb ntawm qhov nruab nrab zaus suab. Lawv yog pub rau cov lus qhia, koj mid-range frequencies.

Yog li ntawd, rau high-zoo playback ntawm suab paj nruag lem nyob rau hauv koj lub tsheb yuav tsum muab sau ua ke tej frequencies thiab pab lawv nruj me ntsis kom meej hais lus. Rau lub hom phiaj no thiab xav tau rau crossover acoustics.

Yuav ua li cas puas

tsim ntawm tus dais no yog heev yooj yim. Qhov no ob zaus lim ua hauj lwm raws li nram no. Yog li, thaum lub zaus sib cais ntawm 1000 Hz, ib tug ntawm ob cov ntxaij lim dej yuav faib frequencies hauv qab no daim duab. Qhov thib ob lim yuav ua hauj lwm nrog cov zaus band saum toj no lub cim. Lim muaj lawv tus kheej npe. Tsawg-pass no yog tsim los ua hauj lwm nrog cov uas tsis muaj frequencies mus txog 1000 Hz. High-pass dab xwb frequencies nyob rau hauv ntau saum toj no 1000 Hz.

Raws li txoj ntsiab cai no yog ua tau hauj lwm ob-txoj kev ntaus ntawv. Txawm li cas los, nyob rau hauv hnub no tus lag luam, muaj peb-txoj kev crossover. Lub ntsiab sib txawv no - yog lwm lim, peev xwm sawv tuav nruab nrab frequencies xws li los ntawm 600 Hz 1000 Hz.

Ntau filtering lub suab zaus raws thiab pub rau lawv mus rau lub sib nug xov hais lus cov frequencies ua rau ib tug zoo dua lub suab hauv lub tsheb.

Kev nta crossovers

Feem ntau cov niaj hnub pab kiag li lawm yog inductors thiab capacitors. nqi khoom tsim nyob rau hauv lub xov tooj thiab zoo ntawm manufacturing cov ntsiab.

Vim li cas cov capacitor thiab cov kauj ib feem ntawm lub crossover rau tus tham? Qhov no yog feem ntau yooj yim foob pob ua ntxaij qhov chaw. Lawv inexpensively tau ko txawv frequencies. Lub capacitor yuav faib thiab cov txheej txheem siab zaus, thaum lub sij hawm kauj ua hauj lwm thaum uas tsis muaj frequencies. Manufacturers competently siv tau cov no zog thiab ua structurally yooj yim tab sis zoo ntaus ntawv.

Tus nab npawb ntawm reactive Cheebtsam muaj feem xyuam rau lub peev xwm ntawm cov ntxaij lim dej: 1 - Siv ib zaug xwb lub caij, 2 - ob ntsiab. Nyob rau hauv lub xov tooj ntawm reactive Cheebtsam li zoo raws li lub crossover Circuit Court system ntxaij lim dej ntawm txawv frequencies uas yog tsis haum rau tej raws. Nws yuav lam xav: ntxiv rau cov Circuit Court yog reactive ntsiab, qhov zoo crossovers hais lus yuav lim cov teeb liab. pom schemes muaj tej yam ntxwv. Qhov no thiaj li hu ua "nqes hav ntawm lub caij txom nyem." Nyob rau hauv lwm yam lus, nws yog rhiab heev. Nyob nyob rau theem ntawm "steepness ntawm lub caij txom nyem", tag nrho cov khoom nyob rau hauv cov lag luam yuav tsum tau muab faib mus rau hauv lub thawj qauv, lub thib ob, thib peb thiab thib plaub qib.

Active thiab passive khoom

Passive crossover rau lub acoustics - nws yog lub feem ntau ntau cov tshuaj. Nws yuav feem ntau yuav pom nyob rau hauv kev ua lag luam niaj hnub no. Raws li lub npe implies, rau qhov no ntaus ntawv tsis tas yuav ib tug ntxiv fais fab mov. Yog li ntawd, lub tsheb yuav muaj ntau yam cuam sai thiab yooj yim dua ua tus installation ntawm lub suab khoom. Lub disadvantage ntawm no pab pawg neeg ntawm pab kiag li lawm uas simplicity yog tsis ib txwm ib tug guarantee ntawm zoo.

Vim lub passive Circuit Court system yuav siv sij hawm yog ib feem ntawm lub zog rau lub lag luam ntawm lub taub lim. Nyob rau tib lub sij hawm lub reactive Cheebtsam hloov theem ua haujlwm. Lawm, qhov no tsis yog lub loj tshaj plaws drawback. Txawm li cas los, nws tsis tig tawm raws li nyias li sai tau mus ua equalization. Qhov no tsis muaj muaj tsis muaj active crossover. Qhov tseeb yog tias nyob rau hauv cov kev phem ntawm ib tug ntau tsim, suab zaus txaus nyob rau hauv lawv yog zoo npaum li cas lim. Vim hauv lub xub ntiag nyob rau hauv lub Circuit Court yog tsis tsuas ntau coils thiab capacitors, tab sis semiconductors, developers tsim high-zoo li muaj ntau compact qhov ntev. Active crossover yog tsis tshua muaj pom nyob rau hauv ib tug nyias muaj nyias ib module. Txawm li cas los, nyob rau hauv tej amplifier muaj xws active ntxaij lim dej.

Yuav ua li cas rau configure tus ntaus ntawv raug?

Nyob rau hauv thiaj li yuav tau lub siab tshaj plaws zoo suab nyob rau hauv koj lub tsheb, koj yuav tsum tau xaiv txoj cai zaus uas tag nrho cov tshaj yuav raug txiav. Nyob rau hauv cov ntaub ntawv ntawm active pab kiag li lawm rau peb bands, koj yuav tsum nrhiav tus ob cut-off point. Tus thawj lub ntsej muag cim nyob rau hauv ntau yam ntawm cov tsawg thiab nruab nrab frequencies. Qhov thib ob - qhov txawv ntawm nruab nrab thiab theem siab zaus.

Yuav ua li cas los xam koj tus kheej ob txhais tes?

crossover xam rau lub acoustics - nws yog ib qho tseem ceeb cov txheej txheem. Tsis tau tsis muaj ib tug chaw tsim tshuaj paus yuav tsis tsim lub zoo meej suab system, uas yuav tsum tau rau cov me nyuam siab zoo suab nyob rau hauv ib tug txawv ntau yam. Rau tsawg zaus siv subwoofers. mid-range hais lus yog siv rau lub nruab nrab. Tab sis thaum tus tag nrho complex yuav sound, tej zaum nws yuav ua rau ib txhia tsis meej pem. Uas yog vim li cas muaj ib tug crossover nyob rau hauv acoustics - mus rau ib tug kev hais lus tsuas yog ib lub teeb liab ntawm ib tug tej zaus. Rau bipolar system los yog lwm yam channel mus rau tus thawj amplifier ntaus ntawv yog kev cob cog rua, lub teeb liab Paub Faib. Qhov no yog lub lim. Muaj nrog tus tham twb muaj passive crossovers, uas yog manufactured thiab tsim los ntawm manufacturers.

Tab sis yog hais tias koj xav mus rau faib lub zaus ntawm lub suab nyob rau hauv ib tug txawv txoj ntsiab cai? Koj tsis muaj rau manually suav dab tsi - nyob rau hauv peb cov high-tech lub sij hawm rau txawm lub feem ntau yooj yim muaj software. Yog li ntawd rau cov suav muaj ib qho kev pab, piv txwv li Crossover hais Tshuab xam zauv.

Thawj kauj ruam nyob rau hauv qhov kev pab cuam yog tsim los siv kuj muaj nqis LF thiab RF hais lus, uas feem ntau yog 4 ohms. Ntxiv txhaj zaus uas lub twj paj nruag yuav tsum tau muab cais. Tam sim ntawd ua kom paub thiab kev txiav txim crossover. Ces, nias lub khawm thiab tos kom txog thaum qhov kev pab cuam yuav raug. Raws li ib tug tshwm sim, nws yuav rov qab ib daim ntawv uas teev cov kev tsim nyog capacitors thiab coils rau cov tswv yim tsis.

xaiv cov nta

Lub lag luam muaj ib tug ntau ntawm pab kiag li lawm uas sib txawv nyob rau hauv zoo, nqi, vendor-meej. Xaiv ib tug crossover rau tus tham tsis yog ib qho yooj yim - koj yuav tsis cia li mus thiab yuav ib yam dab tsi uas koj nyiam. Cov kev xaiv no yog ua los ntawm tej yam hais lus. Xav txog tej yam uas koj subwoofer outputs ib tug tsawg zaus nyob rau hauv lub chav 18 mus rau 200 Hz, reproduces midrange frequencies ntawm 200 mus rau 1000 Hz, thiab lub siab - los ntawm 1000 mus 16000 Hz. Nyob rau hauv no amplifier muaj tsis muaj built-nyob rau hauv lim thiab muaj me tub frequencies nyob rau hauv ntau ntawm 18 mus rau 20,000 Hz. Nyob rau hauv no xyov cov ntaub ntawv, nws yuav tsum tau peb-txoj kev crossover, muaj peev xwm mus siv filtering nyob rau hauv cov yog hom twg.

Tsis tas li ntawd, thaum xaiv them xim rau cov xov tooj ntawm bands. Ib qho tseem ceeb parameter - ntau zaus. Nco ntsoov mus rau hauv tus account lub bandwidth. Multilayer pab kiag li lawm muaj siab rhiab heev, yuav ho zoo suab zoo.

xaus

Yog li ntawd, peb pom hais tias ib tug crossover yog thiab zoo li cas muaj nuj nqi nws ua. Raws li koj tau pom, qhov no yog heev lub caij tseem ceeb nyob rau hauv lub tsheb suab system.