Lub luag haujlwm tseem ceeb ntawm qhov tshwj xeeb yog los hloov qhov teeb meem tsis muaj zog rau hauv qhov muaj zog dua. Txhawm rau sau cov suab ntawm lub kis lossis lub microphone (hauv tsev), koj tuaj yeem xaj ib daim npav nrog lub cim ua ntej.
Daim npav suab nrog cov qauv sau ua ntej
Daim npav suab nrog tus preamplifier yog lub suab zoo rau lub suab uas koj tuaj yeem txuas lub microphone nrog 48V phantom fais fab tuag. Hauv hauv cov suab ntawv no, lub teeb liab los ntawm lub microphone tau ua kom nrov zog los ntawm preamplifier. Cov twj siv microphones uas muaj qhov sib txawv ntawm cov qauv sib txuas los ntawm kev sib txuas ntawm XLR txuas thiab ua haujlwm nrog lub zog phantom. Qhov sib txawv no yog siv los cawm qhov chaw los ntawm kev tso cai rau koj los ntsaws koj lub microphone, guitar, lossis synthesizer ib ntawm ib zaug.
Lub preamplifier yog qhov siv hluav taws xob uas hloov hluav taws xob tsis muaj zog mus rau qhov muaj zog. Lub suab tsis zoo tuaj yeem los ntawm lub microphone lossis turntable. Feem ntau preamplifier muab tso ze dua rau ntawm cov teeb liab. Yog li, nws tuaj yeem xa cov teeb liab los ntawm cov xov tooj yam tsis muaj qhov cuam tshuam loj heev rau ntawm lub zog ceev.
Lub preamplifier siv nyob rau hauv High-End thiab Hi-Fi audio systems ua lub hub rau txuas cov suab kaw lus thiab ua kom nrov nrov. Nyob rau sab pem hauv ntej vaj huam sib luag ntawm cov khoom sib tw muaj cov nyees khawm rau kev tswj hwm, thiab nyob rau sab nram qab vaj huam sib luag muaj cov khoom sib txuas rau sib txuas ntau cov suab sib txuas, incl. tas kis guitar lossis microphone.
Preamp zog
Muaj ob yam ntawm microphones: condenser thiab dynamic. Condenser microphones xav tau phantom lub zog vim tias qhov muab hluav taws xob mus los ntawm cov xov hlau uas coj lub suab. Dynamic microphones tsis xav tau lub zog no. Yog li no, txhawm rau siv lub xov tooj ntim hluav taws xob, koj xav tau ib daim npav suab nrog lub suab npe ua ntej hauv lub microphone, uas yog nruab nrog lub zog phantom. Koj tseem tuaj yeem siv cov suab nrov ua lub ntsej muag nrog cov kab tawm, tab sis qhov no, koj tseem xav tau yuav lub microphone preamplifier uas txuas mus rau cov kab nkag ntawm cov ntawv tso suab.
Tseem muaj multichannel microphone amplifiers muaj. Ntxiv rau kev ua kom nrov dua, lawv tuaj yeem yuav nruab nrog compressor lossis limit muaj nuj nqi (txwv cov teeb liab theem kom tsis txhob ua haujlwm ntau dhau).
Cov lus tawm tswv yim tuaj yeem pab tau. Ntxiv rau, qee qhov preamplifiers tseem yuav muaj suab nrov ua haujlwm tsis zoo. Yog hais tias tsis muaj ib tus neeg hais lus rau lub microphone, lub microphone tawm tswv yim yog muted. Tab sis sai li lub teeb liab theem los ntawm lub microphone dhau ib qib ntsuas, lub suab microphone yuav qhib dua.
