01 ntawm 07
Oppo Digital PM-1 Kev Tshaj Tawm
Kuv ntsuas cov kev ua ntawm Oppo Digital PM-1 qhov kev ntsuas kuv tshaj lwm lub pob ntseg, siv lub GRAS 43AG pob ntseg / cheek simulator, lub Clio FW suab analyzer, lub laptop computer khiav TrueRTA software nrog M-Audio MobilePre USB suab interface, thiab Musical Fidelity V-Tau lub mloog xov tooj cua amplifier. Kuv muab cov kev ntsuas rau pob ntseg taw tes (ERP), roughly qhov chaw nyob ntawm qhov chaw uas koj xib teg tshuam nrog lub axis ntawm koj lub pob ntseg kwg thaum koj nias koj txhais tes tiv thaiv koj lub pob ntseg. Tsis muaj nyiaj rau EQ - ie, diffuse-field EQ - tau ua hauj lwm. Tag nrho cov kev ntsuas tau ua nrog cov khoom muag perforated tawv earpads ntsia.
Daim duab saum toj no qhia txog cov lus teb rau PM-1 hauv sab laug (xiav) thiab txoj cai (xim liab), nrog rau kev ntsuam xyuas qib uas xa mus rau 94 dB @ 500 Hz. Tsis muaj ib qho qauv rau cov lus teb "good" rau lub mloog pob ntseg, tab sis qhov kev ntsuas no qhia txog lub suab nruab nrab. Feem ntau cov ntsej muag muaj qhov siab tshaj ntawm 3 kHz los yog li ntawd (uas yog xav ua kom lub mloog pob ntseg nrov dua li ntawm cov neeg tham), thiab qhov no tsis yog, tab sis nws 3 kHz ncov me me txog +6 dB ntau ntawm lawv yog cov zoo li + 12 dB). Muaj lwm yam me, thiab nqaim heev, ncov ntawm 8.8 kHz.
Kev ntsuas ntawm PM-1, ntsuas ntawm 300 Hz thiab 3 kHz nrog ib lub teeb meem ntawm 1 mW cim rau lub ntsuas kwv yees 32 ohms impedance yog 101.6 dB, uas yog zoo siab rau ib lub pob ntseg ntawm pob qhov hluav taws xob.
Yog tias koj muaj cov lus los yog cov lus nug hais txog cov kev ntsuas, thov xa lawv ntawm tus thawj blog xa mus rau qhov tshooj no.
02 ntawm 07
Oppo Digital PM-1 thiab Audeze LCD-X thiab HiFiMan HE-6
Daim duab no qhia tau hais tias txoj cai ntawm lub xov tooj cua ntawm peb lub siab tshaj plaws ntawm peb qib high-end planetary magnetic headphones: Oppo Digital PM-1 (xim xiav), Audeze LCD-X (xim liab) thiab HiFiMan HE-6 (ntsuab nyuab). Tag nrho peb ntsuas siv tuag ntawm 50 Hz thiab 1.5 kHz. Tshaj ntawd, PM-1 pib muab qhov sib txawv ntawm qhov LCD-X thiab HE-6, uas qhia tau hais tias nws yuav yog lub pob ntseg tsis nrov tshaj plaws hauv cov pawg no.
03 ntawm 07
Oppo Digital PM-1 zaus Resposne, 5 thiab 75 Ohms Qhov Chaw
Qhov no qhia tau tias qhov lus teb ntawm PM-1 nyob rau hauv txoj cai channel thaum pub los ntawm lub suab paj nruag Fidelity V-Tau amp tus 5-ohm tso tawm impedance (liab kab), thiab nrog 70 ohms tsis kam ntxiv los tsim 75 ohmms tag nrho cov zis impedance (ntsuab kab). Ib qho zoo kawg nkaus ntawm no yuav yog ob kab uas sib tshooj sib tshooj, uas yuav qhia tau tias PM-1 qhov kev ntsuas tonal tsis hloov thaum koj hloov qhov chaw pab kiag li lawm. Thiab zoo li koj tuaj yeem pom ntawm no, tus PM-1 qhov tshwm sim ntawm qhov kev xeem no yog zoo nkauj zoo nraug.
04 ntawm 07
Oppo Digital PM-1 Spectral Decay
Spectral lwj (dej tsaws tsag) lub cev ntawm PM-1, txoj cai channel. Ntev xiav / ntsuab streaks qhia resonances, uas feem ntau yog tsis nyiam. No lub mloog pob ntseg qhia tsis muaj qhov tshwj xeeb tshaj tawm. (Yog, koj pom cov lwj ntev hauv cov ntses bass thaj tsam, tab sis qhov ntawd yog qhov qub.) Nco ntsoov tias daim duab kuv tau tso tawm tau pom ib lub lwj ntev nyob thoob plaws lub suab paj nruag tag nrho; ntawm thawj qhov kev ntsuas Kuv xav tias kuv tsis nco qab muab cov khoom tso rau hauv PM-1's qhib rov qab, uas kuv tau ua nrog lub pob qhib-qhib rov qab kom lawv lub suab tsis ua rau kuv lub chaw kuaj.
05 ntawm 07
Oppo Digital PM-1 Distortion thiab Frequency ntawm 100 dBA
Tag nrho harmonic distortion (THD) ntawm PM-1, sab laug channel, ntsuas ntawm ib theem ntawm 100 dBA (txiv kab ntxwv ib txoj lw) thiab 90 dBA (ntsuab kab). Dab tsi koj xav pom ntawm no yog ib txoj kab uas sau tsawg heev hauv daim phiaj qhia. Tus PM-1 tsis muaj ze-pes tsawg distortion pom hauv lub Audexe headphones, tab sis PM-1 qhia distortion tsuas yog nyob rau hauv ib qho chaw kaw ntaiv ncaj nruab nrab ntawm 220 thiab 300 Hz, nce mus txog 6 feem pua ntawm 100 dBA thiab 2 feem pua ntawm 90 dBA.
Kuv tau pom qee qhov tawm tswv yim thiab kev xav txog ntawm kev ntsuas hauv Internet hauv Internet, thiab kuv xav kom muaj kev nyuaj siab rau ob peb yam uas tsim nyog los nkag siab txog qhov ntsuas - uas, zoo li feem ntau cov kev ntsuas acoustic, yog yooj yim los misinterpret.
Ua ntej, 100 dBA yog kev mloog lus nrov heev. Kuv xaiv qhov uas yog kuv xeem tsis yog vim nws yog qhov kev mloog zoo tiag tiag, tab sis vim nws yog ib qib uas qee pob ntseg ua luam tsis muaj kev cuam tshuam thiab qee qhov tsis tuaj yeem. Kuv siv los ntsuas txhua lub mloog pob ntseg ntawm cov qib qis, tiam sis kuv pom tau tias ntawm qhov kev mloog lus, kev sib ntxig yuav luag tsis muaj tshwm sim rau ib qho teeb meem loj.
Thib ob, thaum kuv muaj peev xwm los ntsuas ntau lub pob ntseg thiab sib piv cov kev ntsuas tau los ntawm qhov kev tshoov siab ntawm kuv tus neeg siv cov tswv yim uas kuv tau siv, kuv tau kawm ntau npaum li cas thiab hom kev distortion tau yooj yim dua. Hauv kuv cov kev ntsuas (174 lub ntsej muag rau hnub tim), kuv pom tau tias cov neeg mloog tau hais txog kev sib ntxub hauv kev sib hais hauv cov huab mob tshaj plaws, xws li lub mloog pob ntseg uas nce mus txog 10 feem pua lossis siab dua THD hauv cov ntses bass.
Qhov peb, peb tseem nyob rau theem txheej thaum ub ntawm txoj kev nkag siab ntawm cov teebmeem ntawm cov suab transducers. Kuv xav tias kev lag luam tau ua zoo zoo nrog CEA-2010 subwoofer cov kev tso zis / distortion , tab sis tsis yog, kev ntxig teeb meem ntawm lub suab transducers tsis tshua tau ua. Peb ua lawv nrog lub mloog pob ntseg vim nws yoojyim cais cov transducers los ntawm cov teebmeem ntawm tej suab nrov; nrog cov neeg hais lus, uas yuav tsum tau siv anchoic Chamber. Tab sis yog vim peb ua cov kev ntsuam xyuas tsis txhais tau hais tias peb muaj kev nkag siab ntawm lawv qhov kev cuam tshuam.
Qeb plaub, Kuv paub ntau tus neeg uas ua rau lub pob zeb ntsuas, thiab tag nrho cov uas kuv paub yog tsis kam kos cov lus xaus ntawm lawv cov kev ntsuam xyuas. (Raws li txhua tus neeg xyaum ua science yuav tsum.) Lub mloog pob ntseg ntsuas yog tseem nyob hauv nws cov me nyuam mos; peb tabtom nyam nrog cov txheej txheem ua tsis tiav thiab tsis tiav, yog li txhua tus kws kho mob yuav tsum ua raws li nws qhov kev txiav txim siab thiab kev coj ua zoo tshaj plaws, thiab los kho nws cov tswv yim los xijpeem cov khoom ntsuas nws muaj. Yog li ntawd, yog tias koj tsis tau ua ib qho kev ntsuas pob ntseg hauv koj lub neej thiab koj kos duab txhua hom, kev sib tw siab ntawm lub teeb ntawm lub mloog pob ntseg, koj yog overestimating koj paub thiab kev txawj ntse.
06 ntawm 07
Oppo Digital PM-1 Impedance
Empedance magnitude (tsaus ntsuab ntsuab cim) thiab theem (lub teeb ntsuab ntsuab) ntawm PM-1, txoj cai channel. Nws zoo dua yog tias ob qho ntawm cov kab no zoo li kev sib txig li vim hais tias impedance uas yog nyob hauv txhua zaus frequencies feem ntau muab rau koj ntau dua teb thaum koj hloov qhov chaw pab kiag li lawm. Thiab qhov tseeb, tus PM-1 txog li tiaj li cov lag ntseg, nrog ib qho impedance ntawm 32 ohms (tib yam li qhov kev ntsuam xyuas) nyob thoob hauv lub suab nrov tag nrho, thiab hloov tsis ua haujlwm theem.
07 ntawm 07
Oppo Digital PM-1 Kev rho tawm
Ntawm no yog qhov chaw qaug zog ntawm lub pob ntseg qhib-nraum qab. Daim duab ntawm no qhia tias kev cais ntawm PM-1 txoj cai channel, xws li, nws lub peev xwm los thaiv lwm lub suab. Qib qis tshaj 75 dB qhia tias kev tawm suab ntawm sab nraud nrov - ie, 65 dB ntawm cov ntawv qhia txhais tau hais tias yog -10 dB txo qis sab nraum lub suab ntawm lub suab nrov ntawd. Qhov qis ntawm kab yog nyob rau hauv daim qauv, qhov zoo dua. Qhov kev rho tawm PM-1 yog qhov zoo tshaj qhov nruab nrab rau ib qho kev sib tshooj planar nqus hluav taws xob, txawm tias tseem muaj, yuav luag tsis muaj kev sib txuas ntawm frequencies hauv qab 3 kHz.