Yuav ua li cas yog cov kev txiav-off zaus ntawm lub subwoofer thiab yuav ua li cas kom zoo zoo kho

Configuration niaj hnub suab amplifying apparatus, tsim surround suab qhia haumxeeb sib cais raws. Xws li ib tug lub cev muaj xws li pem hauv ntej thiab nram qab lub hais lus, ib tug center channel thiab subwoofer.

Cov yav tas ua hauj lwm pab rau tsim ntxiv suab los ntawm cov sab ntau zaus los ntawm 20 mus rau 180 Herz. Yeej qhov kev xaiv no yog siv thaum menyuam yees duab kev pab cuam thiab films uas muaj scenes ntawm explosions, launches ntawm qhov chaw rockets thiab lub sijhawm zoo uas koj xav kom tw hnyav ncawv txaus co huab cua.

Feem ntau, subwoofers tsim los rau cov active hauv paus ntsiab lus, uas yog, muaj lawv tus kheej ua-nyob rau hauv amplifier, fais fab mov thiab haum. Ntawm lwm yam uas thiab tej chaw xws li ob lub ntsiab kov "theem» (Level) thiab lub "cutoff zaus» (Crossover Zaus). Assignment theem kov yog to taub, qhov no kev cai siv suab. Thiab hais tias yog vim li cas lub thib ob configuration, nws yog tseeb tsis yog txhua txhua.

Tsis zoo li cov broadband hais lus, subwoofer yog muaj raws qhov sab sauv ntug ntawm lub ntau zaus. Nyob rau hauv lem, basses raug muab faib ua sib sib zog nqus - 40 Hz, medium - mus txog rau 80 Hz, thiab lub siab - txog li 160 Hz. Ntawm uas tus cutoff zaus yog teem, qhov tob mus txog los ntawm cov acoustic nyhuv nyob. Nyob rau hauv tej rooj plaub, kev koom tes nyob rau hauv lub siab ntau yam ntawm cov ntses bass thaj tsam tsim ib tug softer suab, piv txwv li, thaum mloog music los yog saib movies tsis muaj tshwj xeeb los muaj ntxiv lawm. Yog hais tias, txawm li cas los, yuav tsum tau ib tug ntau stringent ntxim rau lub paj hlwb ntawm tus tuav, piv txwv li, nyob rau hauv daim ntawv ntawm cov tawg vaj tse thiab exploding planets, lub subwoofer cut-off zaus yuav txav ze zog mus rau infradiapazonu.

Technically, lub sab sauv zaus txwv - yooj yim ua hauj lwm. Ntawm cov hoob kawm physics nws yog lub npe hu hais tias lub peev xwm ntawm lub taub lim muaj ib tug nrog sib hwm kom tsawg frequencies thiab inductance - rau siab. Yog li, ib tug yooj yim LC-lim yuav zoo cais cov yam cheeb tsam ntau yam, thaum uas txo cov theem ntawm undesired teeb liab spectrum. Yuav kom "kom tawm" high thiab medium zaus tswv yim mus rau lub subwoofer, nws yog txaus los mus pab kom thaum uas tig mus kev tawm tswv yim terminals ntawm ib tug me me capacitor - ib tug ob peb PF. Tab sis xws li ib tug txheej thaum ub lim yuav txo tau ib yam nkaus thiab du zaus teb, li ntawd, nyob rau hauv kev xyaum lawv tsim nyuab dua.

Ntxiv mus, lub cutoff zaus yog muab thiab filtering ntawm lub qhov zis teeb liab mus rau ib tug haib loudspeaker. Ua li no nyob rau hauv lub cev nyob ze cov lus yog lwm board nrog capacitors thiab inductors.

Lub cutoff zaus ntawm lub LPF (tsawg pass lim) tob yuav tsum tau tom, txawm hais tias nyob rau hauv tsis muaj nqi tshuab xws nuj nqi tej zaum yuav tsis tau.

Yog subwoofer chaw nyob rau hauv kev sib raug zoo mus rau lwm cov acoustic Cheebtsam ntawm ib lub tsev ua yeeb yam system - nws yuav tsum tau ua siab ntev thiab thoroughness. Ib tug zoo kev cai yog tias, nyob rau hauv uas lub ntses bass thaj tsam tawm txim liab los ntawm pem hauv ntej thiab surround hais lus yog supplemented los ntawm hauv qab-tsis muaj frequencies broadcasted rau lawv, thiab tsis "cam" nrog txhua lwm yam, uas yog tus muaj zog. Lub hauv paus ntsiab lus ntawm "lub louder lub zoo dua" tsis ua hauj lwm ntawm no.

Yog li, lub cutoff zaus yog ib qho tseem ceeb qhov chaw uas saib kuas muaj tseeb thiab raws li kev ua tau zoo ntawm cov tag nrho lawv.