GMF Ai1 Manuale utente

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Ai1OWNER’SMANUAL

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Thankyouandcongratulationsonyourchoiceofthisproduct.

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Features:

Thisisafull‐featured*AcousticPreamp/*DI/*HeadphoneAmp/*AcousticInterface.Whetheratalocalopen

micnightoratamajorconcertvenue,youwillbeabletodialintheclearnaturalacousticsoundandrouteit

tothestagePAthroughabalancedXLRoutput.YoucanalsousetheAi1topatchyouracousticinstrument

intoyourhometheatersystemtoplayyouracousticinstrumentwithoutanexpensiveamplifier,orjustplugin

apairofheadphonesforprivatelistening.

GettingStarted:

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Asaruleofthumbforallofourproducts,beginwithallofthecontrolsatthemidpoint(12:00o'clock)with

the"NOTCH"and"SHAPE"switches"OFF".ThisisamediumgainsettingwithFLATfrequencyresponse.

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The"INPUTGAIN"controlwillbethefirstcontrolthatyouwillwanttodialin.The"INPUTGAIN"isnota

volumecontrol,ratherthiscontrolsetsthelevelofamplificationappliedtotheinputsignaltoboostittoa

useablelevel.Thereasonthisisadjustableistoaccommodateawiderangeofpickupdevices.Forinstanceif

youareusingahighoutputactivepickupsystemyouwillwanttousealowersettingonthe"INPUTGAIN"

thansayifyouareusingapassivetypepickupsystem.Youwillwanttousethehighest"INPUTGAIN"setting

youcanwithoutoverdrivingordistortingthesignal.Toachievethis,whileplaying,slowlyturnthe"INPUT

GAIN"up(clockwise)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.Onceyouhavedeterminedthebestsettingforthe"INPUTGAIN"werecommendthat

youtakenoteofthissettingandalsothesettingsonyourinstrumentcontrolsforfuturereference.

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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.Servicingisrequiredwhentheapparatushasbeen

damagedinanyway,suchasliquidhasbeenspilledorobjectshavefallenintotheunit,theunithas

beenexposedtorainormoisture,doesnotoperatenormally,orhasbeendropped.

8)Batterynotincluded.UseACadaptorforultimateperformance.

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PowerRequirements:

• Battery:Standard9Vbattery(Powerconsumptionapprox.30mA)

• PowerSupply:9VDC(Regulated),50mAminimum

Attention:Usea“DC”PowerSupplyOnly!Failuretodosomaydamagetheunitandvoidthewarranty

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Specifications:

Input:

Connector: Standard¼”TSJack

InputImpedance1Mohm

LineIn:

Connector: RCA,Unbalanced

InputImpedance10Kohm

Output:

Connector Standard¼”TSJack

OutputImpedance510ohm

DIOUT:

Connector XLRBalanced

OutputImpedance100ohm

LineOut:

Connector: RCA,Unbalanced

InputImpedance1Kohm

Headphone:

Connector 1/8”TRSStereoJack

OutputImpedance5.1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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ControlElements

INPUTGAIN:PleaseseeGettingStartedsectionforafulldescriptionoftheINPUTGAINcontrol.

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LEVEL:ThiscontroladjuststheamountofsignalsenttotheOUTPUT,D.I.OUT,LINEOUT,andHEADPHONE

jacks.

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BASS:Thisisan"Active"control.TheBASScontroladjuststheamountofcutorboostinthelowfrequency

(150HZ)range.

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TREBLE:Thisisan"Active"control.TheTREBLEcontroladjuststheamountofcutorboostinthehigh

frequency(5kHZ)range.

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SHAPE:ON/OFF‐ThistoggleswitchenablesordisablestheSHAPEcontrol.Thiscontrolisamiddipcontrol.In

theONposition,themidfrequencieswillbecutandthehighandlowfrequencieswillbeboosted.

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PHASE:Changesthepolarityofthesignal.Phaseaffectsthewaytheguitartopispressurizedbythe

loudspeakers.Whenthesignalsareoutofphasewitheachother,low‐endfeedbackisminimized.Ifyou

experience“positiveacoustic”feedbackonstage,flipthephaseswitchfromitscurrentsettingtokillthe

feedback.Phasewillalsoaffectthewaythesignalmixesliveandwhenrecording.

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GNDLIFT:Whenactivated,theGNDLIFTdisconnectsthegroundconnectionbetweeninputandoutput.

Dependingonthegroundingoftheconnectedequipment,thiscaneliminatehumorgroundloops.

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POWER:ThisLEDilluminateswhentheAi1isactivated.TheAi1willbecomeactivewhenaplugisinserted

intotheINPUTjack.

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INSTRUMENTINPUT:Thisinput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GUITARINPUTwhentheAi1isnotinusetoconservethebatterylife.Itis

recommendedthatyouturndownyourampormixersinputbeforeplugging/unpluggingfromtheINPUTjack.

Thiswillprotectyourspeakersfromloudpops.

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PHONES:Standard1/8”stereojackforconnectionofheadphones.

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D.I.OUT:PlugastandardXLRcablefromyourPAorrecordingconsoleintothislowimpedancebalanced

output.Usethe“LEVEL"controltosettheoutputlevelwhichmatchesupbestwithyourPAorrecordinggear

andgivesyoutheleastamountofnoise.

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OUTPUT:Thisisastandardunbalancedlineleveloutputsignal.Thisoutputcanbeusedsimultaneouslywith

theD.I.OUTjackforsomecreativesignalrouting.Plugastandardinstrumentcablefromthisoutputtoastage

monitor,amp,orunbalancedMicinputonamixer.

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9VDC–Thisunitcanrunoff9Vbatteryoryoucanconnecta9Vadapter.Theadaptermusthaveabarrel

connectorwithcenternegative.Thebatterymaybeleftinortakenoutwhenusinganadapter.(Toinstallor

replacethe9Vbattery,simplyopentheeasyaccessbatterydooronthebottomoftheunit.Alwaysremember

tounplugyourguitarcordsfromthepedaltoconservebatterylife.

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LINEIN:(Stereo)ThisisaninputforaCD/Tapeplayer,MP3playerorotherequipmentwithRCAtype

connectors.Thesignalpluggedinherewillbeheardthroughalloutputs.(OUTPUT,D.I.OUT,LINEOUT,and

HEADPHONEjacks.)TheLEVELcontroldoesnotaffectthissignal.Volumelevelmustbecontrolledatthe

source.

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LINEOUT:(Stereo)Thisisanoutputthatcanbeusetopatchyouracousticinstrumentintoyourhometheater

systemtoplayyourinstrumentwithoutanexpensiveamplifier,ortopatchintoanyotherequipmentthat

usesRCAtypeinputs.

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BLOCKDIAGRAM

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