Guardian Audio B4 User manual

MaximumPower:
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InputImpedance:
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ChannelEqualization:
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ProtectionCircuit:
180watts@4ohms
120watts@8ohms
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Lo‐ZMic 1kohms
Hi‐ZMic 10kohms
TapePlayback10kohms
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±15dB@5kHz
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Poweronmute2seconds
GuardianAudioisaregisteredtrademarkofMottAudioLLC.
Productandspecificationssubjecttochangewithoutnotice.
B4 Owners Manual
GuardianAudioisaregisteredtrademarkofMottAudioLLC.
Productandspecificationssubjecttochangewithoutnotice.
4 TCC Channel Powered Mixer
WeuseTrueChannelCount(TCC)onallGuardianAudio®
mixers.AmicchannelconsistsofaminimumofanXLRin‐
put,EQandlevelcontrols.Astereochannelconsistsofa
minimumofapairofinputjacks,EQandlevelcontrols.

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FRONTPANELFEATURES
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1)XLRlowimpedancebalancedmicrophoneinput.Phan‐
tompowerforcondensermicrophones.Inputimped‐
anceis10kohms.TheXLRconnectoriswiredPIN1=
shield,PIN2=hot,PIN3=neutral.
2)1/4”linehighimpedanceinput.Thisinputcanbeused
forahighimpedancemicrophoneorlineleveldevice
suchaskeyboards,guitarsandCDplayers.Theinputim‐
pedanceis10kohms.Bothhighandlowimpedance
jackscanbeusedsimultaneously.
3)Channelvolumecontrol.Thiscontroldetermineshow
muchsignalissenttothemainbus.
4)EQcontrols.Theseadjusttheoveralltoneofthechan‐
nel.Theycutorboosthighandlowfrequencies±15dB.
5)Reverbcontroldeterminestheamountofreverbeffect
issenttothemainbusforeachchannel.
6)MasterVolumecontrolstheoverallvolumeofthemixer
output.
7)CD/TapeVolumecontrolstheplaybackleveloftheRCA
inputs.
8)EffectsControlleradjuststheamountanddelaytimeof
thereverbeffects.
9)PhantomPowerturnsthe15vphantompoweronoroff.
10)Phonesisaheadphonejackwithavolumecontrol.
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REARPANELFEATURES
11)Speakeroutput1/4”jacks.Theminimumimpedancefor
thisamplifieris4ohms.Atotalofone4ohmortwo8ohm
speakersmaybeconnected.Donotoperatebelow4ohms.
12)IECconnectorfor115volts60cyclegroundedACcur‐
rent.Neveroperatewithoutthegroundpin.
13)EffectsLoopReturn1/4”jackforaddingexternaleffects.
Thisis10kohm@‐10dBv.
14)EffectsLoopSend1/4”jackforaddingexternaleffects,
recordingoutoraddinganadditionalpoweramp.Thisline
levelsignalisamirrorofthemainoutput.
15)PowerSwitchturnsthemixeronandoff.Afrontpanel
LEDlitindicatesthatthepowerison.
16)TapeRecRCAjacksareforsendingsignaltoarecorder.
Thesearepre‐masteranddonothavereverbortheTape
Inputsignal.
17)TapeInputRCAjacksarefortape/CDorotherlinelevel
signal.Thisis10kohm@‐10dBv.