ADL GT40 - Hum Noise Heard through Headphone or System When Power Is off; The GT40 Is Compatible with ASIO Drivers

Wedon'tsug gestreplacingitifthenoloadoutputACvoltageoverAC12V.
A19‐2.TheGT40hasalinearpowertransformer,notaswitchingmodepowersupply.AlsotheGT‐40'sadaptorisan
AC9V500mAandcannotbereplacedwithaDC9V2Aadaptor.
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Q20:IsitpossibletoconnectlinearPCMrecordersdirectlytotheADLGT40viaUSBforplayback?
A20:TheespritUSBDACiscompatiblewithcomputerbasedsounddataonly.PleaseuploadPCMrecordeddatato
yourcomputerandthenplaybackviatheEsprit.
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Q21:DoestheADLGT40’sfront
panelvolumecontroladjustvolumefortheheadphoneoutputonlyordoesitalso
adjustvolumeoutputfortherearpanelLineOutjacks?
A21:ThevolumecontroladjustvolumeoutputforbothHeadphoneandLineOutjacks,sotheADLGT40canbeused
asapreamplifier
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Q22:When
theGT40isconnectedtoapreampisitpossibletoadjusttheheadphoneoutputvolumeatthe
externalpreamp?
A22:No,theheadphoneoutputvolumecanonlybeadjustedwiththeGT40’svolumecontrol.
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Q23:Isitpossibletolistenviaexternalspeakers(lineout)whileheadphonesarepluggedinto
theGT40’s
headphonejack?
A23:yes,therewillbesignaloutputfromthelineoutjackswhileheadphonesarepluggedintotheGT40headphone
jack.
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Internaluseonly:
Q1:Unbalance(gangerror)experiencedwhenadjustingvolumefrom9O’clocktolowestlevel:
GT40usesananalogtypedualvolumecontrolandanunavoidable,howeververysmallunbalancecanbe
experiencedinsomeunits.Furutechhaspreparedselect analogtypedualvolumecontrolreplacementpartsfor

servicingsuchclaims:
Stepstoresolveclaim:
1. Havetheunitreturnedandassessthelevelofunbalance
2. Comparewithanotherstockunitandfindaunitwithnounbalanceandsendreplacementtocustomer.
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Q2:Humnoiseheardthroughheadphoneorsystemwhenpowerisoff:
Reason:High
impedancewhencircuitisclosed.Whenunitisswitchedon,noisedisappears.
Problemcorrectedinsecondproductionlot.
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Q3:IsitpossibletorecordhighqualityanalogsignalonMACOSX10.6.4application“GarageBand”?IsGarageBand
compatiblewithCoreAudio?
FurutechhasnottestedtheGT40withMACOS
applicationsandweareunabletoanswerquestionsregarding
GarageBandorCoreAudio.TheGT40recordingcapabilitiesweretestedusingfree‐to‐downloadsoftwareAudacity.
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Q4:ASIOdriver
TheGT40iscompatiblewithASIOdrivers