JDS Labs Objective2 User manual

Objective2HeadphoneAmplifier
OperatingInstructions
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1. ConnectanaudiosourcetotheInputjackusinga3.5mminterconnectcable.
2. ConnectheadphonestotheOutputjack.
3. PressthePowerbuttontopowerontheamplifier.Keepvolumelowuntilmusicisplaying.
4. Slowlyraisethevolumeknobtoanappropriatelevel.SeeListeningTipsbelow.
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ListeningTips
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Alwaysuselowgain,unlessmaximumvolumeisinsufficientwithyourspecificequipment.
Formaximumsoundquality,usealinelevelsource,orturnyouraudioplayer’svolumeupveryhigh
(60‐80%).Volumeshouldalwaysbecontrolledfromtheamplifier.
Thisamplifiercanproducedangerouslyloudmusic.Besensibleandlistensafely:www.hearingloss.org
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Troubleshooting
O2producesnosound,butpowerLEDison
oCause:Batteriesareweak.
oSolution:TurntheO2offandrecharge.
O2turnsoffunexpectedlyand/orproducesclickingorpoppingsounds
oCause:Batteriesareweak.
oSolution:TurntheO2offandrecharge.
O2doesnotcharge,chargesonly1battery,orclickswhileconnectedtopoweradapter
oCause:Incorrectpoweradapter.
oSolution:Usea14‐20VACpoweradapter.Seenotesonreverseside.
Distortionathighgain
oCause:O2'svolumecontrolresidesbetweenitsinputandoutputstages.Somecombinationsof
headphonesandline‐levelsourcescanoverdrivetheO2'sinputstage.RefertoNwAvGuy'sblog
forthoroughexplanation.
oSolution:Uselowgain,orswitchtoahighvoltageACadapter.
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ThankyouforpurchasingtheObjective2.Ifyouhaveadditionalquestionsorcomments,feelfreetocontactus
at:[email protected]
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JDSLabs.com

Objective2PowerAdapterInformation
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ATTENTION:ImproperACadaptersand/ortipscanresultinbatteryorcapacitorexplosion
hazardsanddevicedamage.TheO2strictlyrequiresanAC‐to‐ACadapter,asspecifiedbelow.
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•RequiredpoweradaptercharacteristicsfortheObjective2:
Type:  AC‐to‐ACTransformer(AC/AC)
Voltage: 14‐20VACoutput
Current: Minimum200mA
Connector:2.1x5.5mm(IDxOD)
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PLEASENOTE:AC/DCadaptersareverydifferentfromAC/ACadapters.Manufacturerscommonlyabbreviate
andrefertoalltypessimplyas"ACAdapters",whichgivesnoindicationoftheiractualoutput.Beawarethat
mostadaptersareinfactAC/DCtype,whichsupplyDCcurrent.Thesepoweradaptersareusedwithlaptops,
gameconsoles,computerperipherals,etc.,andarenotcompatiblewiththeObjective2.
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TheO2strictlyrequiresanAC‐to‐ACtransformer,withminimum14VACoutput.
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ChargingInstructions
1. ConnectanACpoweradaptertothe14‐20VACJack,thenconnectACadaptertowall.Amplifiercan
beusedsimultaneously.
2. ChargetimeforincludedNiMHbatteriesis8‐24hours.
3. O2chargesindefinitelyatalowcurrent(nochargestatus!).Removepoweradapterasdesired.
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RecommendedPowerAdapters‐NorthAmericaSupplierPart#Price
1.TriadWAU12‐200,120VACto12VAC,200mA
Notes:RecommendedbyNwAvGuy.Actualoutput:13.5VAC,suitableformostusers.
Mouser.com553‐WAU12‐200
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$5.55
2.TriadWAU16‐400,120VACto16VAC,400mA
Notes:RecommendedbyNwAvGuy.**NotverifiedbyJDSLabs**
Mouser.com553‐WAU16‐400
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$10.76
3.Xicon120VACto18VAC,500mA
Notes:RecommendedbyNwAvGuy.**NotverifiedbyJDSLabs**
Mouser.com412‐218054
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$10.65
4.TriadWAU20‐200,120VACto20VAC,200mA
Notes:RecommendedbyNwAvGuy.**NotverifiedbyJDSLabs**
Mouser.com553‐WAU20‐200
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$6.70
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RecommendedPowerAdapters‐UnitedKingdomSupplierPart#Price
1.MaplinN58AT,AC/ACMulti‐Voltage1000mAPowerSupply
Notes:Use15Voutput.**NotverifiedbyJDSLabs**
MaplinN58AT£19.99
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InternationalObjective2owners:Wecannotofferbrandormodelrecommendations
becausepowerstandardsdiffergreatlyaroundtheworld.BesuretouseanAC‐to‐AC
transformer.