Beresford Capella Manuel utilisateur

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BeresfordCapellaHeadphoneAmplifier

Owner’sReferencemanualREV‐1.7

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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

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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‐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powersupply,donotusethe

CapellaonaDCvoltagehigherthan15Voltsregulated.Failuretoobservethis

cautionarynotewillvoidyourwarranty.TheCapellaisalsocapableofoperating

froma12Voltsbatterypack.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

InordertooptimallysetthegainoftheCapella,usetheGainControltoadjustthe

signalleveloftheaudioonInput‐1orInput‐2.TurntheGainControltowardsthe

leftforlessgain,ortowardstherightformoregain.

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TheGainControlcentrepositionissetfor32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.

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5.HF

Someheadphonesareeithertoobright,ornotbrightenoughintheHFrange.

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detailed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headphonesareeithertoolaidback,ortooforwardsounding.TheDepth

Controlallowsyoutoadjustthedepthofthesound.

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.

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8.Balance

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

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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:

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.Allofourpowersupplieshaveenoughheadroom

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

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anadditionaldevice,thischapterdescribeshowtointegratetheCAPELLAintoan

existingconnection.

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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.

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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.

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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.

Ifthegainissetfartoohighincomparisontotheactualgainneededfora

particularheadphoneimpedance,circuitnoisewillbeover‐amplifiedandmight

becomeaudible.Turnthegaindowntoamoreappropriategainlevelinthatcase.



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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