GMF Ai1 User manual

Ai1OWNER’SMANUAL
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Thankyouforyourpurchase.WehavedevelopedaqualityDIwithpreampforusebyprofessionalmusicians
withaddedfeaturesforhomeorprivatepractice.
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Features:TheAi1isaqualityDIandfull‐featuredpreampwithactivetonecontrols.Whetheratalocalopen
micnightoratamajorconcertvenue,youwillbeabletodialinyourclearnaturalacousticsoundandrouteit
throughabalancedXLRoutputorunbalancedstandardlineoutputtothePAsoundsystem.Notonstage?No
problem,youcanalsousetheAi1toconnectyouracousticinstrumentintoyourhometheatersystemorjust
pluginapairofheadphonesforprivatelistening.
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GettingStarted:
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PowerRequirements: 9VDC
Thisunitcanrunoff9Vbatteryoryoucanconnecta9Vadapter.
• Battery:Standard9Vbattery(Powerconsumptionapprox.30mA)
• PowerSupply:9VDC(Regulated),50mAminimum
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AttentionPowerSupplyUsers:
• Usea“DC”PowerSupplyOnly!Failuretodosomaydamagetheunitandvoidthewarranty.
• Theadaptermusthavea2.1mmbarrelconnectorwithcenternegative.Thebatterymaybeleftinor
takenoutwhenusinganadapter.
AttentionBatteryUsers:
• Toinstallorreplacethe9Vbattery,simplyopentheeasyaccessbatterydoorlocatedonthebottomof
theunit.
• AlwaysremembertounplugyourguitarcordsfromtheAi1toconservebatterylife.
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InitialSetup
Beginwithalloftheknobcontrolsatthemidpoint(12:00o'clock)withthe"SHAPE"switch"OFF"andthe
“Ground(GND)LIFT”switch“OFF”.The“PHASE”switchcanbeineitherthe“IN”or“OUT”position.
ThisinitialsetupwillprovideamediumgainsettingwithFLATfrequencyresponse.
Eachcontrolisfullyexplainedinthenextsection.
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ControlElementsPanel
1.POWER:ThegreenLEDilluminateswhentheAi1isactivated.TheAi1willbecomeactivewhenaplug
isinsertedintotheINPUTjack.
2.INPUTGAINisthefirstcontrolyoushouldadjust.Itisnotavolumecontrol.The"INPUTGAIN"sets
thelevelofamplificationappliedtotheinputsignaltoboostittoauseablelevel.Thisadjustment
allowsforawiderangeofpickupdevices.Youwillwanttousethehighest"INPUTGAIN"settingyou
canwithoutoverdrivingordistortingthesignal.Ifyouareusingahighoutputactivepickupsystem
youwilllikelywanttousealowersettingonthe"INPUTGAIN".Ifyouareusingapassivetypepickup
systemyouwilllikelyneedahighersettingonthe"INPUTGAIN".Toadjust,slowlyturnthe"INPUT
GAIN"up(clockwise)whileplayingyourinstrumentuntilyoubegintohearsomedistortion,thenback
the"INPUTGAIN"down(counter‐clockwise)untilthedistortiondisappears.ThiswillgivetheAi1the
mostsignaltoworkwithandthebestsignaltonoiseratio.Takenoteofthisoptimizedsettingfor
futurereference.
3.LEVELadjuststheamountofsignalsenttoALLOutputs(D.I.XLROUT,StandardOUTPUT,HEADPHONE
jacksandRCALINEOUT).
4.BASSadjuststheamountofcutorboostinthelowfrequency(150HZ)range.
5.TREBLEadjuststheamountofcutorboostinthehighfrequency(5kHZ)range.
6.SHAPEON/OFFswitchenablesordisablesthe“SHAPE”control.Inthe“ON”position,midfrequencies
willbecutandthehighandlowfrequencieswillbeboosted.
7.PHASEaffectsthewaythesignalmixesliveandwhenrecording.Ifyouexperience“positiveacoustic”
feedback,flipthephaseswitchtothealternatesettingtokillthefeedback.
8.GNDLIFTIfyouhavemultiplegrounds,youmayhavehumorgroundloops.DisconnecttheDIoutput
groundbyswitching“ON”theGroundLifttoeliminatethisproblem.
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PrimaryInputOutputPanel:
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INSTRUMENTINPUT:usesastandardinstrumentcableandisdesignedforallpassiveandactivetypepickup
signals.Whenaplugisinserted,the9Vbatteryisswitchedon.
BesuretounplugfromtheINSTRUMENTINPUTwhentheAi1isnotinusetoconservethebatterylife.We
recommendyouturndownyourampormixersinputbeforeplugging/unpluggingfromtheINPUTjacktohelp
protectyourspeakersfromloudpops.
PHONES:Useastandard1/8”stereojackforconnectionofheadphones.
D.I.OUT:PlugastandardXLRcablefromyourPAorrecordingconsoleintothislowimpedancebalanced
output.
OUTPUT:Plugastandardinstrumentcablefromastagemonitor,amp,ormixerintothisunbalancedoutput.
Usethe“LEVEL"controltosetallAi1outputlevelstobestmatchyoursoundsystemandgiveyoutheleast
amountofnoise.
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AuxiliaryStereoRCAandPowerSupplyPanel:
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LINEIN:(Stereo)isaninputforaCD/Tapeplayer,MP3playerorotherequipmentwithRCAtypeconnectors.
TheRCAlineinputwillbeheardthroughallAi1outputs.Volumelevelofinputsconnectedthroughthe“RCA
LINEIN”mustbecontrolledatthesource.The“LEVEL”controldoesnotaffectthe“RCALINEIN”volume.
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LINEOUT:(Stereo)canbeusedtopatchyouracousticinstrumentintoanyotherequipmentthatusesRCA
typeinputs,likeyourhometheatersystem.
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Specifications:
Input:
Connector: Standard¼”TSJack
Impedance  1Mohm
Output:
Connector Standard¼”TSJack
Impedance 510ohm
DIOUT:
Connector XLRBalanced
Impedance 100ohm
Headphone:
Connector 1/8”TRSStereoJack
Impedance 5.1ohm
LineIn:(Stereo)
Connector: RCA,Unbalanced
Impedance 10Kohm
LineOut:(Stereo)
Connector: RCA,Unbalanced
Impedance 1Kohm
PowerSupply 9VDC‐Battery,ACAdaptor
CurrentDraw >40mA
Dimensions 3.86”x3.62”x2.07”‐(98x92x52)mm(Includingknobsandjacks)
Weight  .55lbs.–248g
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BlockDiagram:
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Precautions:
1)Readandfollowtheseinstructionsbeforeoperatingtheunit.
2)Pleaseheedallsafetywarningsandkeeptheseinstructionsforfuturereference.
3)Donotusethisapparatusnearwaterormoisture.
4)Cleanonlywithsoft,drycloth.
5)Donotinstallnearaheatsourcesuchasradiators,hearregisters,stoves,orotherapparatusthat
produceheat.
6)Onlyuseattachments/accessoriesspecifiedbythemanufacturer.
7)Referallservicingtoqualifiedservicepersonnel.
8)UseACadaptorforultimateperformance.