Decware The ZEN HEAD Bedienungsanleitung

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!e ZEN HEAD

Personal Battery Operated Headphone Ampliﬁer

MANUAL NO. 02 REV. DATE: 1/2011

DESCRIPTION

TheZenHeadModelZH-1isaworld-classbatterypoweredheadphoneampliﬁer.Itwasdesignedto

workwithandexploitthevirtuesofhighqualityheadphonesandearbuds.Runfromasingle9volt

battery,thisunitisfreeofthegrainandnoisefoundinACpoweredequipment,nottomentionapower

cordmakingitportable.Youcanget24hoursofcontinuouslistening(alongplaneﬂightperhaps)orup

to50hoursofintermittentlisteningafewhoursatatime.Asimplehighqualityon/oﬀswitchand

volumecontrolareallyouhavetorememberhowtousebecausethatʼsallthereisontheexteriorofthe

ZH-1.Ofcourseforaudiophileswehaveseveralinternalsetupswitchesthatcanbeusedtovoicethe

unittoyourliking.

Outﬁttedwithstandard3.5mmstereojacksandapowerONLEDlighttheZenHeadcouldnʼtbeeasierto

operate.Withworld-classdesign,audiophileparts,BurrBrownOperationalAmpliﬁersandafullyanti-

resonantmachinedaluminumchassisyoucanexpectalifetimeofsatisfactionfromthis100%hand

solderedheadphoneampliﬁer.

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SETUP

TheZH-1ispre-conﬁguredatthefactorywiththemostpopularinternalswitchsettingssonothingneeds

tobedonetotryoutyournewZenHead.Evenanewhighqualitybatteryispre-installedsoallyouhave

todoispluginyoursourceandafavoritesetofheadphonesandenjoy.

Justusetheincluded3.5mmstereocable

betweenyourIPODorportabledeviceandthe

inputjackontheZH-1labeled“SOURCE”

Plugyourheadphonesintothejacklabeled

“PHONES”

TurntheVOLUMEcontrolallthewaydown

(counter-clockwise)beforeyouturnontheZH-1.

OnceyouseethegreenLEDlightcomeon,you

canslowlyraisetheVOLUMEcontroltothe

desiredlisteninglevel.

BATTERY

Asingle9voltbatteryisusedandeasilyaccessiblefromtherearbyasimplepressofthethumb.Youcan

useeitherAlkalineorRechargeablebatteries.Ifyourusingthiswithahi-endsourceyoumayﬁnd

Alkalinetosoundbetterthanrechargeablebatteries.IfselectingbetweendiﬀerenttypesofAlkaline

batteries,alwaysgowiththehighestcurrentrating.Batterylifeisdependentonhowloudyouplaythe

ZH-1andthequalityofthebattery,butatanormallisteninglevelyoucanexpectaround50hours.

THEBATTERYSHOULDBEREPLACEDIFthesoundeasilydistortswhenyouraisethevolumeorifthe

greenLEDlightisdim.

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Thebatteryisaccessedbyslidingtherear

paneloveruntilitstopswithyourthumb.

Thenjustliftitoﬀandoutoftheway.

Toremovethebattery,gentlyworkitout

ofthecontainerwithasmallﬂatobjector

yourﬁngernail.Itʼsasnugﬁtasthebattery

compartmentisfeltlinedtoeliminate

vibrations.

DESKTOPUSE

IfyouneedtouseyourZenHead

continuouslyanddonʼtwanttoreplaceor

rechargebatterieswehavefound

productslikethe“9VBatteryEliminator”to

workratherwellwiththeZH-1.This

particularproductandotherslikeitare

fullyregulated9VDCsuppliesand

availableontheInternet.

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INTERNALADJUSTMENTS

TheZH-1has4redswitchesinsidethatcanbeusedtochangehow

yourZenHeadsounds.Toaccesstheseswitchesyouwillhavetoﬁrst

removethe9Vbatteryandthenremovethetwoscrewsinthe

faceplate.Onceremoved,youcanslidethefaceplateandcircuit

boardawayfromthechassisexposingtheswitchesinside.NOTE:If

youwanttocompletelyremovetheboardfromthechassis,you

willalsohavetoremovethetwoscrewsfromthebatteryholderand

thenremovethebatteryholdercompletely.

YourZH-1willlooksimilartothepicturebelow,exceptthatonyoursthefaceplatewillremainconnected

totheboard.Yourswillalsohavetwobatterywiresconnectedtoitjustbehindthepowerswitch.

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SWITCHSETTINGS

Theﬁrstswitchtoexperimentwithislocatedjustbehindthevolumecontrol.CalledtheImpedance

switch.

Thisswitchislabeled10Kand32K.ThesenumbersrepresenttheinputimpedanceoftheZH-1.Inthe

10KpositiontheZH-1willgettwiceasloudsobesuretohavethevolumeadjustedverylowifyouhave

theheadphonesonandarelisteningtomusicwhenyouﬂipthisswitch.The32Kpositionisidealfor2

voltsourcessuchastheCDplayerorDACthatyoumightﬁndinyourlisteningroom.Asyou

experimentwiththisswitchyouʼllnodoubtﬁndthateitherpositioncanbeusedinmostcases,the10K

positionsimplyhavingmuchmoredynamics.

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ThenextswitchtoexperimentwithistheInterstageGainswitch.

Itislocatedhere andisbestadjustedduringaseriouslisteningsessionbecausewhatitdoesissubtle.

TheZH-1hastwostagesofgain,hencetoBurrBrownOperationalampliﬁers.Thisswitchadjuststhe

amountofdynamicsthatareallowedfromtheﬁrststagetothesecond.Usuallythebestapproachisto

setthisswitchto“HIGH”iftheImpedanceswitchissetto32Korto“LOW”ifsetto10K.

WhileyourdoingyourseriouslisteningtotryandhearwhattheInterstagegainswitchdoes,onceyou

settleonthebestsettingforit,youmayaswellcheckouttheCROSSFEEDswitchlocatedrightnexttoit.

Ifyoudonʼtknoworcarewhatcrossfeedis,leavetheswitchsetto“ON”.Infactwecanʼtthinkoftoo

manyreasonsnottohavethisswitchsetto“ON”atalltimes,becausethecrossfeediswhatmakes

headphonesimageproperly.Withoutit,youhaveabrightersoundthatisbothtoowideandcoming

fromthecenterofyourhead.Notallcrossfeedcircuitsarealike.Ifyouthinkyoudonʼtlikecrossfeed,

pleasetakethisopportunitytohearitdoneright.

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TheremainingswitchiscalledtheOutputImpedanceswitch.Thisisusuallythelastswitchyoushould

adjust,becausethealreadyhugediﬀerenceinsounditmakeswillbeevenlargerafteryouhavethe

previousswitchessettoyourliking.

Thisswitch,locatedhere,islabeled“HiZ”and“LoZ”,shortforHighImpedanceandLowImpedancewith

regardtothetypeofheadphonesyouhaveconnectedtoit.Typicallyphonesthatareratedat50ohms

orlessareconsideredLowImpedance,whileeverythingelseallthewayupto600ohmsisconsidered

HighImpedance.TheZH-1willdriverheadphonesfrom30ohmsto600ohmsintheHiZsettingand

headphonesfrom10ohmsto600ohmsintheLoZsetting.Becauseofthishighoverlapbetweenthe

twosettingsitislikelyyouʼllbeabletouseboth.Choosetheonethatsoundsbesttoyourears.

NOTE:In“HiZ”modetheoutputstageoftheZH-1isdirectcoupledtotheheadphonesandwillsound

moreaccurateanddry.In“LoZ”mode,theoutputstageiscapacitorcoupledtotheheadphonesandwill

soundmorejuicyandspacious.

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SOUNDCHARACTER

Sometimesithelpstoknowthegeneralsoundcharacterofacomponentsothatyoucanspottroublesif

thecreepup.Forexample,theZH-1hasjetblack,noiselessbackgroundssoifyouhearanynoiseyou

knowitʼscomingfromyourcable,yoursource,orisintherecordingitself.TheZH-1isgrainfreeand

musicallyinvolving.Ithasbeenspeciﬁcallydesignedtobecompletelyfatiguefreeevenafteralldayuse.

Soifyoursoundisdry,grainyorfatiguinginanyway,againyouʼllknowitʼsnottheZH-1.

ThevoicingthatwentintotheZH-1tookoverayeartoperfectandtheresultisanearlyperfectbalance

wherenothingisfeaturedthatshouldnʼtbe,yourattentionisdrawntowhereitshouldbe,notto

frequencyordynamicbasedanomalies.Youcantrustitʼsfrequencybalance,timbreandsenseoftiming.

BONUS-ALINELEVELPREAMPTOO!

Unlikemostheadphoneampliﬁers,theZH-1hastheabilityandgaintobeusedasalinelevelpreampliﬁer

intoimpedancesallthewayupto100KOhms.ThisunusualabilitymakestheZH-1asleeperofapreamp

forpuristswantingtohookittotheirfavoritetubeorsolidstateampliﬁer.InfrontofagreatSETampliﬁer

knownfortransparency,theZH-1isfarfromdisappointing.Theinternalswitchesletyouvoiceyour

ampliﬁerwiththesameexcellentoptionsthatyouusedwithyourheadphones!

IPODUSE

Manypeoplewillinsistthatthelineleveloutputcomingoﬀthe20pinconnectorofyourIpodhasbetter

soundthantheheadphonejack.ThisrequiresanIPODdockofsomekindtoconvertthejacktoRCA

outputsviaaribboncable.Forthatreasonalone,thesoundisusuallyworse.WedesignedtheZH-1to

soundbestcomingoﬀtheheadphonejackofyourIPOD.Ofcourseallportableplayersandphoneswill

alsoworkﬁnewithaZH-1viatheirheadphonejack.

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WHATNOTTODO

Keepitoutofthewater.Whileyoucanrunoveritwithacarandexpectittostillworkﬁne,itdoesnot

likewater.Ifitgetswetincleanwater,justremovethebatteryandplacetheZH-1somewherewarmand

dry(likeinthesun)foracoupledaysanitwillbeﬁne.

Donotdropitonitʼsvolumeknobasaperfectlyalignedhitcancausethevolumecontroltocrackand

youwillhavetosenditinforaquickrepair.

Donotunderestimateitspower.ThisdevicewillgetLOUDandthensome.Makesureyoualwayshave

thevolumecontrolmostofthewaydownwhenyoustartlistening.

Donotleavethebatteryintheunitforextendedperiodsoftimeorinthesun.Putanotherway,takethe

batteryoutifyouʼrenotgoingtousetheZH-1forseveralmonths.

Donothookthebatteryupbackwards.YouZH-1willfailinstantlysmokingbothchips.Thisrepairisnot

coveredunderwarrantyandisnotcheap.

DonotuseyourtoetobreakthefalloftheZH-1ifyoudropit.Theunitisheavyandyourtoewillhurtlike

hell.

DonotusecheapbatteriesastheywillnothaveenoughpowertokeeptheZH-1fromhavingpoor

performance.Sticktonamebrandalkalinebatteries.RechargeablesareOKasisLithium.

O W N E R S M A N U A L

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