Tsis txhob cia tus Amplifier Qhov Kev Ntsuas Kom Zoo Ntawm Lub Teeb Nws Lub Zis
Qhov tseem ceeb tshaj plaws uas sawv hauv online thiab ntawv xov xwm Tawm rau cov amplifiers, lub tso suab, thiab tsev ua yeeb yam hauv tsev, yog qhov kev sib tshuam hauv Watt-Ib-Channel (WPC). Ib tus txais tau muaj 50 Watts-Per-Channel (WPC), lwm tus muaj 75, thiab lwm tus muaj 100. Qhov ntau watts txoj cai zoo? Tsis Tsim Nyog.
Cov neeg feem coob xav tias ntau tshaj qhov watts txhais tau ntau dua. Tus amplifier nrog 100 WPC yog ob zaug uas nrov tshaj 50 WPC, puas yog? Tsis raws nraim.
Lub hwjchim muaj peev xwm ua kom muaj kev puas tsuaj
Thaum nws tawm los rau cov zais hluav taws xob muaj peev xwm tiag tiag, tshwj xeeb tshaj yog cov suab surround receivers , heev nyob ntawm kev ncaj ncees qhov chaw tsim tshuaj paus kev txiav txim xyuas qhov tso zis hluav taws xob qhov ntsuas nws xaiv los txhawb. Thaum koj pom Cov Ntawv Tshaj Qhia lossis cov khoom tshaj tawm qhov khoom uas lub khw tsim fais fab, koj tsis tuaj yeem siv tus lej ntawm lub ntsej muag tus nqi. Koj yuav tsum tau saib xyuas zoo dua ntawm qhov chaw tsim khoom lag luam yog pib cov lus qhia ntawm.
Piv txwv, hauv tsev ua yeeb yam hauv tsev uas muaj qhov 5.1 lossis 7.1 channel configuration , yog qhov hais tawm cov lus tso tawm cov qauv tawm thaum lub amplifier tsav tsheb ib zaug los yog ob tug raws ib zaug, los yog nws yog qhov kev pom zoo ntawm lub tshuab thev rau txhua qhov ntes ib txhij? Tsis tas li ntawd, yog kev ntsuas ua siv 1 kHz kuaj lub suab, los yog nrog 20Hz mus rau 20KHz kuaj tones ?
Ua lwm yam lus, thaum koj pom ib qho kev sib tw ntawm 100 watts-ib-koog ntawm 1 kHz (uas yog xam tus qauv nruab nrab qhov kev siv) nrog ib cov kauj vab uas tau tsav, qhov tseeb tawm hauv ntiaj teb xov tooj thaum txhua 5 los sis 7 raws kev khiav hauj lwm tib lub sij hawm nyob rau tag nrho cov frequencies yuav qis, tejzaum nws li 30 lossis 40% qis dua. Ib qho zoo qhia yog pib qhov kev ntsuas thaum twg ob txoj kev uas tau tsav, thiab, tsis yog siv ib lub suab ntawm 1kHz, siv 20Hz mus rau 20kHz tones, uas nruab nrab yog qhov kev khiav ceev tshaj plaws uas ib tus neeg muaj. Txawm li cas los xij, uas tseem tsis tag nrho mus rau hauv tus account lub tshuab hloov hluav taws xob lub zog thaum tag nrho cov kev uas tau tsav.
Ntawm qhov tod tes, tsis yog txhua txoj hauv kev yuav tsum muaj tib lub hwj chim tib lub sij hawm thaum cov kev hloov hauv cov ntsiab lus hauv lub suab yuav cuam tshuam cov kev cai ntawm txhua lub sijhawm ntawm txhua lub sijhawm. Piv txwv, ib zaj yeeb yaj duab soundtrack yuav muaj seem uas tsuas yog pem hauv ntej raws tej zaum yuav tsum muaj kev tso zis ntawm lub hwj chim, tiam sis cov cheeb tsam ntawd tej zaum yuav cia li tso tawm qis ntim ntawm lub suab nrov. Los ntawm tib lub cim taw qhia, cov cheeb tsam puag ncig yuav raug hu los ua ntau lub hwj chim rau kev tawg los yog kev sib tsoo, tab sis cov pem hauv ntej tej zaum yuav raug teeb tsa tib lub sijhawm.
Raws li cov xwm txheej no, qhov kev ntaus nqi cov lus piav qhia hauv cov ntsiab lus tseem ceeb dua rau kev ua neej zoo. Ib tug qauv yuav 80 watts-ib-channel, ntsuas los ntawm 20Hz mus rau 20kHz, 2-raws kev tsav, 8 ohms, .09% THD.
Dab tsi ua tau tag nrho cov lus siv txhais tau hais tias lub zog (los yog tsev ua yeeb yam hauv tsev) muaj peev xwm tsim tawm 80-WPC (uas muaj ntau tshaj li qhov nruab nrab me me chav nyob), siv cov kev kuaj tones ntau tag nrho ntawm tib neeg lub rooj sib hais, thaum ob txoj ke yog kev khiav hauj lwm nrog tus qauv 8-ohm tham . Kuj tseem ceeb yog qhov cim qhia tias qhov tshwm sim los ntawm kev sib thooj (piv rau THD lossis tag nrho harmonic distortion) tsuas yog .09% - uas sawv cev rau cov lus tso tawm suab heev (ntau dua ntawm THD tom qab hauv tshooj no).
Nruam Lub Zog
Ib qho tseem ceeb ntxiv rau kev saib xyuas yog qhov peev xwm ntawm tus neeg tuaj yeem lossis tus neeg hloov khoom siv los tso nws cov hwj huam tsis tu ncua. Ua lwm yam lus, vim hais tias koj tus neeg tuaj yeem / tus neeg tuaj yeem tuaj yeem sau nyob rau ntawm qhov muaj peev xwm tsim tawm 100 WPC, tsis txhais hais tias nws ua tau rau txhua lub sijhawm ntev. Nco ntsoov xyuas kom meej tias thaum koj kos rau Specifications, tias WPC cov zis raug ntsuas hauv RMS lossis FTC cov ntsiab lus, thiab tsis muaj cov ntsiab lus xws li Peak Power lossis Maximum Power.
Decibels
Kev ntsuas suab yog ntsuas hauv Decibels (dB) . Peb lub pob ntseg pom qhov txawv ntawm qhov ntim hauv ib txoj kab uas tsis yog linear. Cov pob ntseg ua rau tsis hnov suab nrov li nws nce. Decibels yog lub sijhawm teev cov lus sib dhos. Qhov sib txawv ntawm kwv yees li 1 dB qhov tsawg kawg nkaus yuav hloov hauv ntim, 3 dB yog hloov me ntsis hauv ntim, thiab txog 10 dB yog kwv yees li ntawm doubling ntawm ntim.
Txhawm rau muab koj lub tswv yim ntawm qhov no hais txog qhov teeb meem hauv lub ntiaj teb li cas rau cov qauv hauv qab no:
- 0 dB yog lub rooj sib hais ntawm lub rooj sib hais
- Ntxhi: 15-25 dB
- Tom qab suab nrov: li 35 dB
- Lub tsev los yog tom chaw ua haujlwm qub: 40-60 dB
- Cov lus hais li qub: 65-70 dB
- Orchestral climax: 105 dB
- Live Rock music: 120 dB +
- Mob Mob: 130 dB
- Dav hlau aircraft: 140-180 dB
Hauv kev txiav txim rau ib qho kev hloov ua kom muaj suab nrov dua li ob lwm yam hauv cov decibels, koj xav tau 10 lub sij hawm ntau tshaj tawm cov zis. Ib qho amplifier nyob ntawm 100 WPC muaj peev xwm ntawm ob zaug qhov ntim theem ntawm 10 WPC amp, tus amplifier nyob ntawm 100 WPC xav tau 1000 WPC ua ob zaug nrov. Ua lwm yam lus, txoj kev sib raug zoo ntawm lub ntim thiab cov tshooj tawm suab yog cov logarithmic es tsis qhia tawm.
Distortion
Tsis tas li ntawd, qhov zoo tshaj ntawm cov amplifier tsis yog cia li pom nyob rau hauv cov zis tso zis thiab nrov li cas nws tau txais. Ib lub tshuab thaij tawm uas ua rau suab nrov nrov los yog distortion ntawm cov ntim nrov tau ntau npaum li cas yuav ua tsis tau. Koj yuav zoo dua nrog tus amplifier txog 50 WPC nrog ib theem qis dua uas muaj zog dua tus muaj zog nrog high distortion levels.
Txawm li cas los xij, thaum muab cov khoom sib piv los ntawm cov amplifiers los yog tsev ua yeeb yam hauv tsev - Tej yam yuav tau "pos huab" - raws li koj yuav pom, ntawm nws daim ntawv, cov amplifier lossis receiver A muaj ib qho kev ntsuam xyuas distortion ntawm .01% ntawm 100 watts ntawm cov zis , thaum lub tshuab amplifier lossis receiver B tej zaum muaj ib qho kev ntsuam xyuas distortion ntawm 1% ntawm 150 watts ntawm cov zis.
Tej zaum koj yuav xav tias amplifier / receiver A yuav yog tus txais txiaj ntsig zoo dua - tab sis koj yuav tsum tau ua tib zoo saib tias qhov kev sib tshuam ntawm ob tug neeg tau txais tsis tau hais txog tib lub zog tso. Nws yuav yog tias ob leeg txais yuav muaj qhov sib npaug (los yog kaw) kev sib thooj thaum ob leeg khiav ntawm 100 watts cov zis, los yog thaum tus txais A tau tsav los 150 tawm watts, nws yuav muaj qhov sib txawv (los yog phem tshaj) .
Ntawm qhov tod tes, yog tias tus amplifier muaj qhov sib ntxiv ntawm 1% ntawm 100 watts thiab lwm tus muaj qhov sib txawv ntawm qhov sib txawv ntawm .01% ntawm 100 watts, ces nws tseem pom tseeb tias qhov kev hloov siab los yog lub receiver nrog .01% yog tus txais txiaj ntsim zoo tshaj, tsawg kawg nrog kev txiav txim siab txog qhov kev qhia ntawd.
Raws li qhov kawg piv txwv, yog tias koj khiav dhau ib lub zog los sis lub receiver uas muaj ib qho kev ntsuam xyuas distortion ntawm 10% ntawm 100 watts, nws yuav unlistenable ntawm qhov tso zis ntau lawm - nws tau hais tias nws yuav mloog, nrog tsawg distortion, ntawm ib theem qis zog tso zis. Txawm li cas los xij, yog hais tias koj khiav mus rau ib qho kev hloov siab los sis ib tus neeg tuaj yeem uas teev cov 10% kev sib nraus (lossis qhov kev sib daj sib luag siab tshaj 1%) rau nws cov lus tso tawm tau tso tawm - kuv yuav ntshe ncaj qha - los yog, qhov tsawg tshaj plaws, sim kom tau ib co ntxiv kom meej los ntawm cov chaw tsim khoom ua ntej koj yuav.
Distortion specifications yog qhia los ntawm lub sij hawm THD (Tag Nrho Harmonic Distortion) .
Qhov Teeb Meem-Rau-Zis Tshaj (S / N)
Kuj, lwm qhov zoo tshaj nyob rau hauv qhov zoo tshaj plaws yog qhov Teeb Meem-Rau-Qis Tshaj (S / N), uas yog qhov sib piv ntawm suab mus rau yav tom ntej. Qhov loj qhov ratio, ntau lub suab nyiam (suab paj nruag, lub suab, cov teebmeem) yog sib cais ntawm cov teebmeem acoustical thiab cov suab nrov tom qab. Hauv kev qhia ua ntu zus, S / N sib piv cov npe hauv cov decibels. Tus S / N piv ntawm 70db yog ntau tshaj yog xav tau tshaj li S / N ratio ntawm 50db.
Dynamic Headroom
Qhov kawg (rau lub hom phiaj ntawm qhov kev sib tham no), tab sis tsis tsawg kawg (los ntawm kev txhais tau tias), yog qhov peev xwm ntawm koj tus neeg txais khoom / tus neeg ua haujlwm kom muaj peev xwm tso tawm ntawm lub sijhawm luv luv kom haum suab paj nruas peaks los yog suab nrov heev hauv cov yeeb yaj kiab. Qhov no tseem ceeb heev nyob rau hauv tsev cov yeeb yaj duab cov kev siv, qhov twg cov kev hloov loj heev hauv ntim thiab nrov nrov thaum tshwm sim hauv zaj yeeb yaj kiab. Qhov kev qhia no yog qhia ua Dynamic Headroom .
Dynamic Headroom yog ntsuas hauv kev ntsuas vaj tse. Yog hais tias ib tus txais / amplifier muaj peev xwm los muab ob npaug rau lub zog tso tawm rau ib lub sij hawm luv luv kom haum raws li cov kev piav qhia saum toj no, nws yuav muaj qhov Dynamic Headroom ntawm 3db.
Lub Kab Hauv Qab
Thaum mus yuav ib tus neeg nqa khoom / amplifier, yuav tsum ceev faj txog cov khoom ntub tawm ntawm lub zog thiab tseem noj cov khoom ua ke xws li Total Harmonic Distortion (THD), Signal-To-Noise Ratio (S / N), Lub Npe Hluav Taws Xob, qhov zoo tshaj ntawm cov neeg tham koj siv.
Ib lub zog los yog tus tau txais, txawm hais tias qhov chaw nruab nrab ntawm koj lub suab los yog lub tsev ua yeeb yam , lwm yam xws li Loudspeakers, Input devices (CD, Turntable, Cassette, DVD, Blu-Ray thiab lwm yam ...) kuj txuas rau hauv cov saw. Txawm li cas los xij, koj tuaj yeem muaj qhov zoo tshaj plaws nyob rau hauv, tab sis yog tias koj tus neeg tuaj yeem lossis tus neeg siv zog tsis tuaj yeem ua haujlwm, koj txoj kev mloog yuav raug kev cuam tshuam.
Txawm hais tias txhua qhov kev qhia ua rau cov neeg muaj peev xwm ua tau zoo tshaj plaws, nws yog qhov tseem ceeb uas yuav tsum tau qhia meej txog tias ib qho kev sib tw nkaus xwb, tsis muaj cov ntsiab lus tseem ceeb tsis qhia rau koj li cas hauv tsev ua yeeb yam hauv tsev.
Tsis tas li ntawd, txawm hais tias nws yog ib qho tseem ceeb rau kev nkag siab txog lub ntsiab lus uas tau muab pov tseg rau koj los ntawm Ad los yog neeg muag khoom, tsis txhob cia tus lej poob siab rau koj. Kev txiav txim siab zaum kawg yuav tsum yog siv koj lub pob ntseg, thiab hauv koj chav.