Beresford Capella Guide de démarrage rapide

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BeresfordCapellaHeadphoneAmplifier

Owner’sReferencemanualREV‐2.5

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Introduction

TheCapellaisahigh‐endheadphoneamplifierdesignedforaudiophilelistening.Itcan

acceptaudiosignalsfromananaloguesource.AuniquefeatureoftheCapellaarethe

variousrotarycontrols.Togethertheyhelpyoutoadjustyourheadphonesforthemost

pleasantlisteningexperience.TheCapellaissuitableforusewithheadphonesfrom12Ohms

to600Ohms.

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BoxContent

Thefollowingitemsareincluded:

UserManual

PowerCord

12VoltACtoDCpowersupply

BeresfordCapellaHeadphoneamplifier

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ImportantSafetyInstructions

ReadtheseinstructionsHeedallwarningsFollowallinstructions

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‐Onlyusea12Voltregulatedpowersupply,ora12VoltbatterypacktopowertheCapella.

‐Toreducetheriskoffireorelectricalshock,donotexposethisapparatustorainor

moisture.

‐Protectthepowercordfrombeingwalkedonorpinched.

‐UnplugtheCapellafromthemainsduringlightningstormsorwhenunusedforlongperiods

oftime.

‐SwitchOFFyourequipmentbeforeconnectingtheCapellatoanything.

‐Therearenouser‐serviceablepartsinsidethisproduct.Referallservicingtoqualified

servicepersonnel.ThereisauserreplaceableinternalfuseinsidetheCapella.However,this

fuseshouldnotbereplacedwithoutfirstconsultingthefactoryservicecentreforadvice.

‐SwitchofftheCapellawhenitisnotbeingused.

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Cautionlisteningtooloudly

Notethatlisteningtoheadphonesatextremelyloudlisteninglevelsmaydamageyour

hearing.Enjoyyourmusic,enjoytheCapella,butprotectyourears.

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UsageNotes

SwitchONtheCapellabeforeswitchingONanyotherequipmentconnectedtotheLINEOUT

oftheCapella.Thisistoavoidanyrelayswitchonnoises.

Waitatleast20secondsbeforeyoupowerontheCapellaafterpoweringitoff.Waitanother

8secondsfortheprotectionrelaytodisengage,beforeanyaudiowillbeaudible.Inthecase

ofamalfunction,pleasepowertheunitoff,waitfor20seconds,andthenpoweritbackon.

Iftheissuepersists,pleaseconsultthetroubleshootingtableorcontactus

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WhatvoltagescanIruntheCapellaon?

TheincludedpowersupplyistheonerecommendedforusewiththeCapella.Ifyoudo

decideorneedtousetheCapellawithadifferentmainspowersupply,makesureitisnot

higherthan12Voltsregulated.Alternativelya12VoltLithium,Li‐ion,orLI‐Pobatterypack

canalsobeused.Leadacidbatterypackscanproducealowlevelnoiseinsomecases.So

theiruseisnotrecommended.

Failuretoobservethiscautionarynotewillvoidyourwarranty.Contactusforfurtheradvice

ifrequired.

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FrontPanelControls

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1.PowerON/OFFSwitch

2.PowerStatusIndicator

3.GainAdjustmentKnob

4.LowFrequencyDampingAdjustmentSelector(4positions)

5.HighFrequencyAdjustmentKnob

6.6.35mmHeadphoneSocket

7.DepthAdjustmentKnob

8.BalanceControlKnob

9.VolumeControlKnob

10.PeakDetectorLEDs

11.3.5mmINPUTSocket

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1.PowerOn/Off

LiftingthePowerSwitchtotheupwardspositionswitchesONtheCapella.

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2.PowerLED

ThePowerStatusIndicatorturnsgreenwhenthepowerswitchisintheupwardsposition,

andthepowersupplyiscorrectlyconnected.

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3.Gain

TheGaincontrolsetsthelevelofamplificationoftheinputsignalthatissenttothe

headphones.TurntheGainControltowardstheleftforlessgain,ortowardstherightfor

moregain.

TheGainControlcentrepositionissetfor64Ohms,whilstthemaximumsettingissetfor

600Ohms.Youcanalsoadjusttheheadphoneamplifiergaintoproperlydriveheadphones

thatareverysensitiveorrequireadditionalpower.

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4.Damping

Differentheadphonesizesandmaterialconstructionrequireadifferentlevelofdampingof

theconesinordertogetthebestbasspossible.The4‐positionrotaryDampingswitchoffers

fourpossibleoptionstogetabettercontrolledbasssound.Theleftmostpositionoffersless

dampingandthedeepestbass.Therightmostpositionoffersthemostdampingandthe

firmestbass.

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5.HF

Someheadphonesareeithertoobright,orcanseverelyaffectlistenerswhosufferfrom

tinnitus.TheHFcontrolcanreducethedynamicrangeofhighfrequencysignals,thereby

makingitfarmorecomfortabletolistentootherwisefartoobrightaudiotracks.

TurntheHFControltotheleftiftheforalesspronouncedhighfrequencyoutput.

TurntheHFControltotherightifyourequireamorepronouncedHFoutput.

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6.HeadphoneOutputConnection

ConnectyourheadphonestotheCapellausingastereo6.35mmplug.Usea3.5mmto6.35

mmstereoadapterifyourheadphonesterminateintoa3.5mmplug.

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7.Depth

Someaudiorecordingscanmakeaheadphonesoundeithertoolaidbackortooforward

sounding,especiallyinthemidrange.TheDepthControlcaninmanycasesadjustthedepth

ofthestereosignalthatisplacedinthecentreofarecording.Thiscanproduceamoreup

closeandpersonal,oramorefurtherawaysoundofespeciallycentreplacedvocalsand

instruments.ThechangesinresponsetotheoperationoftheDepthControltakeafew

secondstocomeintoeffect.

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TurntheDepthControltotheleftifyourequireamorelaidbacksound.

TurntheDepthControltotherightifyourequireamoreforwardsound.

8.Balance

TheBalanceControlvariesthesoundoutputlevelbetweentheLandRchannels.

TurntheBalanceControltotherighttoreducetheoutputintherightchannel.

TurntheBalanceControltothelefttoreducetheoutputintheleftchannel.

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9.Adjustingthevolume

RotatingtheVolumeKnobclockwiseorcounter‐clockwisewillincreaseordecreasethe

volumelevel.Theactualheadphonevolumeleveldependsontheheadphones’sensitivity,

theinputsignallevel,andtheHeadphoneGainsetting.

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10.PeakDetectorLED

TherearetwoPeakDetectorLEDsbehindtheVolumeControlknobthatwilllightupwhen

theinput‐1orinput‐2signalisreachingclippinglevel.Turndownthelevelofthesignal

comingintotheCAPELLAinputswherethatispracticallypossibleifthePeakDetectorLEDs

areconstantlyON.

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11.Input‐1

Youcanconnectaportableaudiodeviceviaitsheadphoneoutputsockettothe3.5mm

Input‐1byusinga3.5mmto3.5mmstereocable.Theanaloguesignalwillbeamplifiedand

senttotheheadphoneandVariableLINEOUToutput.

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BackPanelConnectors

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1213141516

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12.GroundConnection

13.StereoRCAInputSocket

14.VariableRCAOutputSocket

15.DCInputSocket

16.DCpass‐throughOutputSocket

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12.Ground

TheseparateGroundconnectionpointonthebackoftheCapellacanbeconnectedtothe

Groundterminalofasourcedeviceoraudioamplifier,ifthereisoneprovided.Thismightbe

requiredinsomeinstallationswhereanoticeablehumispresentintheaudiosignal.

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InputSignalConnections

TheCapellasupportstwodifferentkindsofanalogueinputconnections.Dependingonyour

intendedusage,pleaseconnecttherequiredoutputsourcestotheCapella.

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13.AUXIN(Input‐2)

YoucanconnectanaudiodevicewithRCAanalogueoutputsintotheCapellaAUXINusinga

pairofRCA/PHONOcables.Theanaloguesignalwillbeamplifiedandsenttotheheadphone

andVariableLINEOUToutput.

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Notes:

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The3.5mmInput‐1socketandtheRCAInput‐2socketcannotbeusedsimultaneously.When

astereo3.5mmconnectorispluggedintotheInput‐1socket,theInput‐2socketismuted.

Whenpluggingandunplugginga3.5mmconnectorintotheInput‐1socket,donotleavethe

connectorpartiallypluggedin.

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14.VariableLINEOUT

TheCapellacanbeusedasapre‐amplifierbyconnectingtheLINEOUTtoapoweramplifier

orapairofactivespeakers.TheoutputleveliscontrolledbytheVolumeKnob.Theoutputis

mutedwhenaheadphoneispluggedin.

Note:OnlytheVolumeControlandBalanceControlareactiveontheLINEoutput.

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15.DCinputsocket

InserttheDCplugfromtheCapellapowersupplyintothisDCsocket.

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16.DCoutputsocket

Inserta2.1mmto2.1mmDCplug‐to‐plugflyleadinthissocketandconnecttheotherendto

theDCinputsocketofoneofourrecentDACsifyouwishtoshareonepowersupply

betweentwounits.Butmakesurethatthevoltagefromthepowersupplyis12Volts.

Allofourpowersuppliesareabletopowertwoofourowndevices.

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Installation

InserttheCapellaintoyouraudiosystembyfirstconnectingtheCapellatoananalogue

audiosource.AnalogueaudiosourceswouldincludetheRCAsingleendedoutputofaCD

player,DVDplayer,tuner,phonopreamplifier,oroutputsofapreamplifier.Youcan

integratetheCAPELLAintoanexistingconnectionbetweenyouraudiosourceandan

additionaldevice.Bywayofexampleofanamplifierasanadditionaldevice,thischapter

describeshowtointegratetheCAPELLAintoanexistingconnection.



PullouttheplugofthestereoRCAcablefromtheinputINontheamplifier.

ConnectthisplugtotheAUXINontheCAPELLA.

ConnectasecondstereoRCAcabletotheinputINontheamplifierandtotheLINEOUTon

theCAPELLA.

UsetheVolumeControlontheCAPELLAtoadjusttheaudiolevelofthesignalgoingtothe

amplifier.



8



QuickStartGuide

Pluginyourheadphonestothefrontpanel,makingsuretheVolumeControlisturneddown.

PlugtheCAPELLApowersupplyintoanACpowerpoint.

OncetheCAPELLAhasbeenswitchedON,wait8secondsforthemutingrelaytoswitchoff

beforeturninguptheVolumeControl.



HeadphoneGainSelection

Foroptimalsoundquality,youcanadjusttheGainsettinginordertoproperlymatchthe

sensitivityandimpedanceoftheheadphonesinuse.Theruleofthumbforselectingthe

propergainlevelistofindacomfortablelisteningvolumethatutilizestheupperrangeof

theVolumeKnob.ItisgenerallybettertohavetheVolumeKnobsettoahighvolumelevel

whenadjustingtheGainControl.



NOTE:whenadjustingtheGainControlwithoutasignalbeingpresent,thegainbiasing

voltagemightbeaudibleasafaintscratchingnoise.Thisisquitenormal.



Atthispointyoushouldbereadytoenjoythebenefitsofhighendaudioplayedthroughthe

CAPELLAHeadphoneAmplifier.



‐Pleasecontact[email protected]ifyouhaveanyquestionsnotaddressedinthis

referencemanual.

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