API 3124mb+ - Input Selection

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 HI‐ZIN:¼”high‐impedanceinstrumentinput
 LEVEL:Stereomixersendlevel
 PAN:Stereomixersendpan
 AUX:Auxiliarybussendlevel
 VUMETER:7LEDVUmeter
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4.3 InputSelection
Eachpreamplifiercanreceivethree(3) inputsources:
 MIC(Microp h one):RearpanelfemaleXLRmicrophoneinputwithswitchable48Vphantom
power
 INST(Instrument):Frontpanel ¼”unbalanced‐10dBuinstrumentlevelinput
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4.3.1 MICSwitch
TheMICswitchisusedtoselecttheinputsource.WhenthegreenLEDabovetheswitch
isilluminated,therearpanelXLRinputistheactivesource.WhenthegreenLEDabove
theswitchisnotilluminated,thefrontpanel¼”inpu tistheactivesource.
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4.3.2 MicrophoneInput
SelectthemicrophoneinputbypressingtheMICswitchandagreenLEDshouldturnon
abovetheMICswitch.TheMICinputconnectionontherearpanelwillbetheactive
input.
 FemaleXLRmicrophoneinput
 48Vphantompower
 ‐20dBpad
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GreenLEDilluminateswhenMICswitchengaged
 VUmeterindicateslevelofpreamplifieroutput
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48V:Provides48voltphantompowertotheMICinputfe maleXLRconnector
 RedLEDaboveswitchilluminateswhenengaged
IMPORTANT: Cautionshouldbeexercisedwhen engagingphantompower!Damage
canoccurifphantompowerisappliedtosomeaudiodevices,including
most ribbon microphones. The 3124mb+ output should also be fully
loweredwhenengagingthe48Vswitch.
‐20dBPAD:Inserts
a‐20dBattenuatorafterthemicrophoneinput
 YellowLEDaboveswitchilluminateswhenengaged
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GAIN:microphonepreamp lifier level control
 10dBminimumgain(includingPAD)
 65dBmaximumgain(includingPAD)
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