Yuav ua li cas xaiv lub amplifier kom zoo rau lub suab nrov?

Lub amplifier yog ib qho tseem ceeb tshaj plaws ntawm lub suab system. Nws muaj ntau yam uas peb yuav tsum tau ua raws li thaum xaiv txoj kev daws teeb meem. Txawm li cas los xij, kev xaiv ntawm tus qauv tshwj xeeb tsis pom tseeb, uas yog ntxiv cuam tshuam los ntawm kev lag luam khoom siv suab nrov. Dab tsi yog tsim nyog them rau? Hais txog nws hauv qab no.

Muaj ib yam uas kuv yuav tsum hais thaum pib. Ua ntej, peb yuav cov suab nrov thiab tom qab ntawd peb xaiv cov amplifiers tsim nyog rau lawv, tsis txhob ua lwm yam. Cov tsis muaj suab nrov uas lub amplifier ua haujlwm yog qhov tseem ceeb.

Amplifier thiab lub zog amplifier

Lub tswv yim ntawm lub amplifier feem ntau yog txuam nrog cov khoom siv suab hauv tsev. Nyob rau theem, xws li ib tug ntaus ntawv yog hu ua ib tug powermixer, lub npe los ntawm kev sib txuas ntawm ob lub ntsiab.

Yog li cas ib qho txawv ntawm lwm tus? Lub tsev amplifier muaj lub zog amplifier thiab preamplifier. Lub hwj chim amplifier - lub ntsiab lus uas ua kom lub teeb liab, lub preamplifier tuaj yeem muab piv rau lub tov khoom.

Hauv theem thev naus laus zis, peb qee zaum siv cov cuab yeej ntawm hom no vim tias nws tsis ua haujlwm, thiab txij li peb xav tau cov khoom siv tau hais los saum toj no ua lub preamplifier kom muaj txhua yam ntawm tes, peb raug yuam kom yuav lub amplifying lub ntsiab nkaus xwb vim tias lub teeb liab xav tau. amplified xyov.

Cov cuab yeej zoo li no, tsis zoo li lub tshuab hluav taws xob, feem ntau tsuas muaj lub teeb liab tawm tswv yim, lub hwj chim hloov thiab lub suab nrov tawm, nws tsis muaj preamplifier. Peb tuaj yeem paub txog ib qho khoom siv los ntawm nws qhov kev tsim kho, vim tias muaj qhov sib txawv ntawm cov khoom siv los kho ntau yam tsis muaj.

Yuav ua li cas xaiv lub hwj chim amplifier?

Kuv tau hais saum toj no tias nws tsis yog ib txoj haujlwm yooj yim. Peb yuav tsum tau coj mus rau qhov loj los ntawm qhov tsis sib xws ntawm lub suab nrov uas muab "kawg" ntawm lub zog yuav ua haujlwm. Peb xaiv cov khoom siv kom lub zog tso zis ntawm lub amplifier (RMS) sib npaug ntawm lub zog hais lus lossis siab dua me ntsis, tsis txhob qis dua.

Qhov tseeb yog tias nws yooj yim dua rau kev puas tsuaj rau lub suab nrov nrog lub suab nrov tsis muaj zog dua li qhov muaj zog heev. Qhov no yog vim hais tias los ntawm kev ua si rau tag nrho cov peev txheej ntawm peb cov khoom siv, peb tuaj yeem cuam tshuam lub suab, vim hais tias lub suab nrov yuav tsis muaj peev xwm rov tsim dua lub suab ntawm ib qho khoom vim tsis muaj zog txaus los ntawm lub suab nrov. Lub suab nrov xav tau "ntau dua thiab ntau dua" thiab peb lub zog amplifier tsis tuaj yeem muab nws. Lwm qhov tseem ceeb uas muaj kev cuam tshuam tsis zoo rau qhov tsis txaus watts yog qhov siab ntawm lub diaphragm deflection.

Kuj xyuam xim rau qhov tsawg kawg nkaus impedance uas lub cuab yeej tuaj yeem ua haujlwm. Yuav ua li cas yog tias koj yuav lub hwj chim amplifier uas ua hauj lwm nrog qhov tsawg kawg nkaus tso zis impedance ntawm 8 ohms thiab ces yuav 4 ohms loudspeakers? Lub teeb tsis tuaj yeem sib haum nrog ib leeg, vim hais tias lub amplifier yuav tsis ua haujlwm raws li cov neeg tsim khoom pom zoo thiab yuav raug puas tsuaj sai.

Yog li ntawd, ua ntej lub suab nrov, tom qab ntawd, raws li lawv cov kev txwv, lub hwj chim amplifier nrog lub hwj chim tsim nyog thiab qhov tso zis tsawg kawg nkaus impedance kom muaj peev xwm ua haujlwm nrog cov khoom nrov nrov.

Lub hom phiaj puas tseem ceeb? Yog lawm. Rau qhov pib, yog tias koj tsis muaj nyiaj ntau dhau, kuv pom zoo kom yuav cov khoom siv hauv tsev, peb cov khoom tsim. Nws yog qhov tseeb tias qhov tsos thiab lub zog-rau-qhov hnyav piv tsis txhawb, tab sis nws yog qhov kev xaiv zoo tiag tiag.

Kev tsim kho kuj tseem ceeb heev. Vim qhov hnav tsis tu ncua, kev thauj mus los thiab siv nyob rau hauv ntau yam mob, cov theem fais fab amplifiers yuav tsum muaj cov tsev nyob ruaj khov, ua los ntawm tsawg kawg yog ob millimeter sheet hlau.

Kuj xyuas seb nws muaj kev ruaj ntseg dab tsi. Ua ntej tshaj plaws, peb yuav tsum nrhiav qhov "Tshem" LED. Nyob rau hauv 90% ntawm lub hwj chim amps, tig rau ntawm no LED disconnects lub suab nrov, yog li ntsiag to. Qhov no yog ib qho kev tiv thaiv tseem ceeb heev vim nws tiv thaiv lub suab nrov tawm tsam DC voltage uas ua rau lub suab nrov. Yog li yuav ua li cas yog hais tias lub amplifier muaj fuses thiab kem yog 4 los yog 8 ohms rau ncaj qha tam sim no, lub fuses react maj mam, tej zaum nws yog txaus rau ib feem ntawm ib tug thib ob thiab peb muaj ib tug burnt coil nyob rau hauv lub suab nrov, yog li nws yog ib qho tseem ceeb heev. kev tiv thaiv.

Tom ntej no hauv kab yog qhov taw qhia clip, lub "clip" LED. Technically hais lus, nws signals overdrive, piv txwv li tshaj lub rated tso zis zog. Nws manifests nws tus kheej nyob rau hauv colloquially hais lus nrog crackle. Tus mob no yog qhov txaus ntshai rau tweeters uas tsis nyiam distorted signals heev thiab yooj yim puas, tsis hais lub suab zoo ntawm distorted amplifier.

Amplifier parameters uas yuav tsum tau coj mus rau hauv tus account

Qhov tseem ceeb parameter yog lub zog ntawm lub amplifier - nws yog tus lej hloov pauv tus nqi ntawm qhov ntsuas load impedance. Lub zog no yuav tsum tau nthuav tawm raws li RMS lub zog, vim tias nws yog lub zog txuas ntxiv uas lub tshuab hluav taws xob tuaj yeem muab tawm thaum ua haujlwm ntev. Peb tsis suav nrog lwm hom fais fab, xws li lub zog suab paj nruag.

Cov lus teb zaus kuj yog ib qho tseem ceeb parameter. Nws txiav txim siab qhov tsawg kawg nkaus thiab ntau zaus ntawm lub teeb liab ntawm lub amplifier cov zis. Yuav tsum tau muab nrog ib tug txo nyob rau hauv lub teeb liab amplitude. Cov khoom lag luam zoo muaj qhov ntsuas no ntawm qhov zaus ntawm 20 Hz -25 kHz. Nco ntsoov tias peb txaus siab rau "lub zog" bandwidth, uas yog, ntawm qhov sib npaug ntawm qhov sib npaug ntawm qhov ntsuas qhov ntsuas, nrog rau qhov siab tshaj plaws tsis muaj kev cuam tshuam ntawm lub teeb liab tso zis.

Distortions - nyob rau hauv peb cov ntaub ntawv, peb txaus siab rau tus nqi tsis tshaj 0,1%.

Kev siv hluav taws xob los ntawm lub network kuj tseem ceeb. Piv txwv li, rau 2 x 200W amplifier, xws li kev noj yuav tsum yog tsawg kawg yog 450W. Yog tias cov chaw tsim khoom qhuas cov cuab yeej siv hluav taws xob siab heev thiab siv hluav taws xob tsawg los ntawm lub network, nws txhais tau hais tias cov kev txwv no tsis tshua muaj kev cuam tshuam thiab kev yuav khoom ntawm cov khoom zoo li no yuav tsum tau tso tseg tam sim ntawd.

Yog tias koj tau nyeem tag nrho cov lus ua tib zoo, tsis txhob hnov ​​​​qab txog qhov ntsuas impedance ntawm lub amplifier thiab. Qhov siab dua cov chav kawm ntawm lub hwj chim amplifier, qhov zoo dua nws yog yoog rau kev ua haujlwm nrog qis impedance.

Nco ntsoov, cov khoom zoo yuav tsum ntsuas nws tus kheej, vim li cas? Zoo, vim hais tias cov ntsiab lus hnyav tshaj plaws ntawm lub amplifier kev tsim kho yog cov ntsiab lus uas txiav txim siab nws qhov tseem ceeb tshaj plaws. Cov no yog: transformer (50-60% ntawm tag nrho qhov hnyav), electrolytic capacitors thiab cov dab dej kub. Nyob rau tib lub sijhawm, lawv yog (sib nrug ntawm lub dab dej kub) yog ib qho ntawm cov khoom kim dua.

Qhov no tsis siv rau chav kawm "D" amplifiers raws li cov khoom siv hluav taws xob hloov pauv. Vim tsis muaj lub tshuab hloov pauv, cov lus qhia no yog lub teeb heev, tab sis tseem kim dua.

Summation

Cov kab lus saum toj no muaj ntau qhov yooj yim thiab nws yog npaj rau cov pib tshiab, yog li kuv tau sim piav qhia txhua lub ntsiab lus yooj yim li sai tau. Kuv paub tseeb tias tom qab nyeem tag nrho cov ntawv ua tib zoo koj yuav tsis muaj teeb meem nrog kev xaiv cov cuab yeej zoo. Nco ntsoov siv kev nkag siab zoo thaum yuav khoom, vim tias qhov kev xaiv zoo yuav ua rau muaj ntau yam xwm txheej zoo thiab tsis muaj kev ua haujlwm yav tom ntej.

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