DIGISYNTHETIC DP Series User manual

Brand: DIGISYNTHETIC

Model: DP Series

Category: Musical Equipment

Type: User manual

This manual is also suitable for

DP45O

DIGISYNTHETIC DP Series is a professional power amplifier designed to meet the demands of even the most critical sound reinforcement professional. It features:

Rugged, road-worthy construction
Patented Output Device Emulation Protection
High damping factor for superior control over low frequency drivers
Safe with any load. Bridge-Mono and Parallel-Mono modes offer optimal load-matching performance.
Complete protection against shorted outputs, mismatched loads, overheating, DC input/output and high frequency overload

With its powerful sound and wide range of features, the DIGISYNTHETIC DP Series is the perfect choice for a variety of applications, including:

DIGISYNTHETIC DP Series is a professional power amplifier designed to meet the demands of even the most critical sound reinforcement professional. It features:

Rugged, road-worthy construction
Patented Output Device Emulation Protection
High damping factor for superior control over low frequency drivers
Safe with any load. Bridge-Mono and Parallel-Mono modes offer optimal load-matching performance.
Complete protection against shorted outputs, mismatched loads, overheating, DC input/output and high frequency overload

With its powerful sound and wide range of features, the DIGISYNTHETIC DP Series is the perfect choice for a variety of applications, including:

DPSeries

PowerAmplifier

DIGISYNTHETIC

USERMANUAL

PROFESSIONALPOWERAMPLIFIERDP45O

TABLEOFCONTENTS

.Introduction2

2.13

2.23

Welcome

Unpacking

4.Installation

4.1Stereo6

4.2Mono6

4.3AdditionalLoadProtection7

4.4RequiredACMains7

5.Operation

5.1Precautions7

5.2PowerIndicator8

5.3ProtectionSystems8

5.3.1DriveProtection8

5.3.2TransformerthermalProtection8

5.3.3SignalLimitingCircuit9

6.Specifications

7.Service

Page1

3.Description

3.1Features3

3.2Frontpanel4

3.3Rearpanel4

1.SafetyInstructions 2

Theinformationfurnishedinthismanualdoesnotincludeallofthedetailsofdesignand

engineeringofthisparticularproduct;notdoesitcovereverypossibleapplicationor

situationconcerningitsusage,whichmayoccurduringtheinstallation,operationor

maintenanceofsaidDIGISYNTHETICproduct.

IMPORTANT

THEPRODUCTREQUIRESCLASS2OUTPUTWIRING.

WARNING

TOREDUCETHERISKOFELECTRIC

SHOCK,DONOTEXPOSETHIS

EQUIPMENTTORAINORMOISTURE!

MagneticField

CAUTION: Donotlocatesensitivehigh-gainequipmentsuchaspreamplifiersor

tapedecksdirectlyaboveorbelowthisunit.Becausethisamplifierhasahighpower

density,ithasastrongmagneticfieldwhichcaninducehumintounshieldeddevices

thatarelocatednearby.Thisfieldisstrongestjustaboveandbelowtheunit.Ifan

equipmentrackisused,werecommendlocatingtheamplifier(s)atthebottomofthe

rackandthepreamplifierorothersensitiveequipmentatthetop.

TOPREVENTELECTRICSHOCK,DO

NOTREMOVETOPORBOTTOM

COVERS.NOUSERSERVICEABLE

PARTSINSIDE.REFERSERVICINGTO

QUALIFIEDSERVICEPERSONNEL.

DISCONNECTPOWERCORDBEFORE

REMOVINGREARPANELCOVERTO

ACCESSGAINSWITCH.

ShockHazard-DoNotEnter

ChocHasard-N*entrent

SchockeHazard-TestNicht

Betrete

UrtoHazard-DoNonEntrano

CAUTION

Theexclamationpointtriangleisusedtoalerttheusertoimportantoperating

and/ormaintenanceinstructions.

Printedonrecycledpaper.

Thelightningbolttriangleisusedalerttheusertotheriskofelectricshock

Page2

3Description

3.1Features

Rugged,road-worthyprofessionalpoweramplifier.E.I.A.Standard19"(48.3cm)rack-

mountablechassis.

DPSeries""circuitrygenerateslargevoltageswingswhileavoiding

electricalstressontheoutputstages.Thisresultsinlowdistortionandhighreliability.

Frontpanelpowerswitchwithturn-ondelayforloudspeakerprotection.

PatentedOutputDeviceEmulationProtectionkeepstheamplifierworkingunder

extremeconditions.

Highdampingfactorprovidessuperiorcontroloverlowfrequencydriversforaclean,

accuratelowend.

Safewithanyload.Bridge-MonoandParallel-Monomodesofferoptimalload-

matchingperformance.

Completeprotectionagainstshortedoutputs,mismatchedloads,overheating,DC

input/outputandhighfrequencyoverload,fullinternalfaultprotection.

BalancedXLRinputswithbalanceddirectXLRoutput.Optionalbarrierblockinput

connectorsareavailablewiththePM-BBaccessories.

Efficientheatsinksandself-containedforcedaircoolingsystem,dissipateheat

quicklyandevenlyforextraamplifierprotectionandgreaterpoweroutput.

LogicOutput

□

2.1Welcome

ThankyouforchoosingDIGISYNTHETICCO.LTDprofessionalaudioproduct.You

havejoinedagrowinggroupofaudioprofessionalswhohaveturnedto

DIGISYNTHETICforthemostadvancedaudioamplificationproductsavailable.So

welcometotheDIGISYNTHETICfamily!AllDIGISYNTHETICproductshavebeen

designed,engineeredandmanufacturedtomeetthedemandsofeventhemostcritical

soundreinforcementprofessional.

Pleasereadthismanualcarefully.Itcontainsimportantandhelpfulinformationtoenable

youtogettheDIGISYNTHETICperformanceoutofyournewproduct.Ifyouplantouse

thisamplifierineitherofthe2availableMonomodes,pleaserefertosection2.2

Pleaseunpackandinspectyournewamplifierforanydamagethatmayhaveoccurred

duringtransit.Ifdamageisfound,notifytheTransportationCompanyimmediately.Only

you,theconsignee,mayinitiateaclaimwiththecarrierfordamagewhichoccurred

duringshipment.Remembertosaveallpackingmaterialsintheunlikelyeventyourunit

shouldeverneedtobereturnedtothefactoryforserviceofanykind.

2Introduction

1.1Unpacking

Page3

3.2Frontpanel

3.3Rearpanel

Page4

PowerSwitch

Ch2.LevelControlCh1.LevelControl

CH.1 CH.2

Indicators

Power

cord

BindingPostandSpeakon

OutputConnectors

1-Ch.1OutputInput

2-Ch.2OutputInput

MODESWITCH

AC220V10%/50Hz-60Hz±

4Installation

Installation

IMPORTANT!ALLOWFORADEQUATEVENTILATION.

Alwaysreducevolumebyturninglevelcontrolsfullycounterclockwisewheneither

connectingordisconnectingcablestotheamplifier.Thisreducesthechanceofan

audio"spike"thatcouldpossiblycauseloudspeakerdamage.Theguidelinesbelow

areprovidedtohelpyougetyouramplifierinstalledandreadytogoquicklyand

easily.BesuretofollowtheinstructionsinSections2.1and2.2fortheselected

modeofoperation.Additionalinformationoninputsensitivity,loadprotectionand

requiredACmainsisprovidedinSection2.3.

1.Installtheamplifierinastandard19-inch(48.3cm)rack,orplaceitonastable

surface.Themountingdimensionsare19-inch(48.3cm)wide,3.5-inch(8.9cm)tall

and17.7-inch(44.9cm)deepbehindthemountingsurface.

AMPLIFIER

(TOPVIEW)

IMPORTANT:Besurethebackof

theamplifierissupported

AIRFLOWAIRFLOW

AIRFLOW AIRFLOW

43.5cm

FRONTOFAMPLIFIER

Fig.2.4BlockAirFlowDoNot

Page5

2.Usehigh-qualityloudspeakercablestoconnecttheloadtotheamplifier'soutputs.Donotuseshieldedcable.

3.Useshieldedcablestoconnectaudiosourcestotheamplifier'sinputs.Eitherbalancedorunbalancedwiringcanbeused

asshownbelow.(BarrierblockinputconnectorsareavailablewiththePM-BBaccessories).

BALANCED

GND

SHIELD

INPUT FROM

PREAMPLIFIER

INPUT

SHIELD

PREAMPLIFIER

UNBALANCED

SHIELD

FROM

4.1Stereo

.2Mono

1.Turndownthelevelcontrols(fullycounterclockwise)and

2.SetthebackpanelStereo/MonoswitchtoStereo.

3.Connecttheinputandoutputcables.

4.Turnontheamplifierandadjustthelevelforeachchannelusingthefrontpanellevel

controls.

Youramplifier'sMonomodesprovidedoublethepoweroftheStereomodeinasingle

channel.InBridge-Monomode,theoutputsarewiredfortwicetheoutputvoltage.In

Parallel-Monomode,theinputsareparalleledtolinkthetwochannels.Bridge-Mono

modeisprovidedforloadswithimpedancegreaterthan4Ohms.Parallel-Monomode

shouldbeusedwithloadsof4Ohms.

1.Turndownthelevelcontrols(fullycounterclockwise)and

2.SetthebackpanelStereo/MonoswitchtoBridge-Mono.

3.Connecttheinputandoutputcables.

4.Makesuretheloadisbalanced(neithersideshortedtoground)andusethe

black(-)

bindingposts.

5.Turnontheamplifierandadjustbothlevelcontrols.

1.Turndownthelevelcontrols(fullycounterclockwise)and

turnofftheamplifier.

Bridge-Mono turnofftheamplifier.

Onlychannel1inputisused.

donot

Parallel-Mono turnofftheamplifier.

Page6

3.ConnecttheinputandoutputcablesasshownintheOnlychannelinputisused.

4.Turnontheamplifierandadjustbothlevelcontrols.

Toprotectagainstexcessivepower,afusecanbeaddedinserieswitheach

loudspeakercable.Asinglefusecanprotecttheentiresystem,orcanbeusedforeach

driver.Highfrequencydrivers(tweeters)areusuallymoresensitivetolargevoltage

peaks,whilelow-frequencydrivers(woofers)aretypicallymostsensitivetotheheatfrom

averageRMSoutputpower.Toprotectyourtweeters,werecommendthatyouusea

high-speedinstrumentfuseliketheLittlefuse361000series.Toprotectyourwoofers,

werecommendusingaslow-blowfusethatmorecloselyrepresentsthethermal

responseofyourwoofer.UseFigure2-6tofindthecorrectvalueforeithertypeoffuse.

AllDPSeriesamplifiersareshippedwithanappropriatelinecordandplug.When

possible,useapowerreceptacleonadedicatedcircuit;andalways,makesureitwill

providethecorrectvoltageandsufficientcurrent.Wedonotrecommendoperatingyour

amplifierwithvoltagesgreaterthan10%aboveorbelowtheunit'sratedvoltage.For

example,ifyouramplifierisratedfor220VAC,thelinevoltageshouldnotexceed240

VAC.

CAUTION:Connectunitonlytoapropersupply.Useonlythreewirecordwhichis

providedwithunit.

CAUTION:Neverstrapthetworedoutputterminalstogether(inparallel).Never

connecteitherredoutputterminaltochassisground.

IMPORTANT:Thechannel2levelcontrolwillremainilluminatedwhenoperatingin

Parallel/M-onomode.

4.3

4.4

AdditionalLoadProtection

RequiredACMains

Page7

5.operatinginstruction

Althoughyouramplifierisprotectedfromexternalfaults,thefollowingsafetyprecautions

arerecommended:

1.ThereareimportantdifferencesamongtheStereo,Bridge-MonoandParallel-Mono

operatingmodes.PleaserefertoSection2foradditionalinformation.

2.:

3.Usecarewhenmakingconnections,selectingsignalsourcesandcontrollingthe

outputlevel.

5.1Precautions

WARNINGDonotchangethepositionofthestereo/monoswitchunlessthe

amplifierisfirstturnedoff.

CAUTION:Neverstrapthetworedoutputterminalstogether(inparallel).Never

connecteitherredoutputterminaltochassisground.

Also,makesuretheStereo/Monoswitchissettotheproperposition.

4.Donotshortthegroundleadofanoutputcabletotheinputsignalground.Thiswill

formagroundloopandmaycauseoscillations.

5.DonotoperatetheamplifierfromACmainsinexcessof10%variationaboveorbelow

theselectedlinevoltage,andonlyatthespecifiedlinefrequency.

6.Neverconnecttheoutputtoapowersupplyoutput,batteryorpowermain.Such

connectionsmayresultinelectricalshock.

7.Tamperingwithcircuitrybyunqualifiedpersonnelormakingunauthorizedcircuit

changesmaybehazardousandinvalidateswarranty.

Whenilluminated,thegreenpowerindicator(thevolumecontrol)showsthatthe

amplifierhasbeenturnedon.Itisdrivenonlybythelow-voltagepowersupplyand

doesnotindicatethestatusofthehigh-voltagesupply.

DPSeriesamplifiershaveextensiveprotectionsystems,includingTPC,protection,

driveprotection,transformerthermalprotection,andfusesorcircuitbreakersthat

protectthepowersupplies.

RememberDIGISYNTHETICAudioINC.,isnotliableforanydamagethatresultsfrom

overdrivingothersystemcomponents.

5.2PowerIndicator

.3ProtectionSystems5

5TheDriveProtectionSystemtemporarilyremovesoutputdrivetoprotectthe

amplifieranditsloads.DriveProtectionSystemcanbeactivatedintwosituations.

First,ifdangeroussubsonicfrequenciesordirectcurrent(DC)isdetectedinthe

amplifier'soutput,theunitwillactivateitsDC/low-frequencyprotectioncircuitry,which

putstheamplifierinDriveProtectionmode.Thismodeprotectstheloadsand

preventsoscillations.Theunitresumesnormaloperationassoonastheamplifierno

longerdetectsdangerousoutput.AlthoughitisextremelyunlikelythattheDC/low-

frequencyprotecti-onsystemwilleverbeactivated,impropersourcematerialslike

subsonicsquarewavesorinputover-loads,thatexcessivelycliptheinputsignal,can

activatethissystem.

.3.1DriveProtection

Theamplifier'sprotectionsystemwillactivatetheamplifier'sDriveProtectionmode

inraresituationswhereheavycommon-modecurrentisdetectedintheoutput.The

unitshouldneveroutputheavycommon-modecurrentunlessitscircuitryis

damaged.ActivatingDriveProtectionmodehelpspreventfurtherdamage.

5.3.2

AllDPSeriesamplifiershaveTransformersThermalProtection.Thisprotectionis

activatedinunusualsituationswheretheunit'stransformertemperaturerisesto

unsafelevels.Undertheseabnormalconditions,theunitwillremovesoutputdrive

toprotectamplifier..Thefanwillcontinuetoruninallunits.Theamplifierwillreturn

tonormalafteritcoolstoasafetemperature.I

TransformerThermalProtection

tisveryunlikelythatyourDPSeries

amplifierwilleveractivateitsTransformerThermalProtectionaslongasitis

operatedwithinratedconditions.

Page8

5.3.3SignalLimitingCircuit

OutputPower:

Thisinternallimitingcircuitautomaticallyreducegainbecauseofasignificantdeviation

betweeninputandoutputsignalflow,preventingoccurrenceofgrossnon-linearity

conditionsinsidetheamplifiercausedbyoverdrive,overloadordefect,andkeepsthe

signalshapeunalteredunderanyconditions.Thecircuitkeepsignalflowdistortion

under0.5%,andthusguaranteescleansoundandeffectivespeakonprotection.

Allamplifierspecificationsapplytothefollowingsettings:Stereomodewith8-ohmloads

andaninputsensitivityof32dB,unlessotherwisespecified.

Thefollowingspecificationsareguaranteedminimumsforstandard1

kHzpower.Formoreinformation,seethepowermatrixinFigures3.1through3.2

(DIGISYNTHETICimumaveragepower@0.1%THD+N).

6.Specifications

PowerSpecification

LoadImpedance:

RequiredACMains:

ACConnector:

Controls

Power:

Level

Safewithalltypesofloads.Ratedat4to8ohmsinStereo,4to

8ohmsinBridge-Monoand4to8ohmsinParallel-Monomode.

Current,frequencyandvoltagerequirementsareprovidedon

eachunit'sbackpanel.Allmodelsdraw90Wattsorlessatidle.

Drawsupto10ampsofcurrent.

AnappropriateAClinecordandplugareprovided.110/220VAC,

50Hz/60Hzunitshaveastandard3-wire,15-ampgroundedconnector(NEMA5-

15P).

Afrontpanelrockerswitchisusedtoturntheamplifieronandoff.

:Afrontpanelrotarypotentiometerforeachchannelisusedtocontroltheoutput

level.

DP450:(220/50Hz)

Fig.2.2TPC

Fanspeed

DIGISYNTHETIC.fanspeed

TemperatureProtectCircuit(TPC)

Automatic

Min.fanspeed,

TPCnormal

At75C°

Heatsinktemperature

Amplifier:DPSeries

TPCLimiteractive

80 C

90 Mutethesignal

Outputthesignal

Fig.2.1FrontPanelLevelControl

ThefollowingdiagramillustratestheactionstakenbytheThermal

ManagementSystem:

Page9

CHANNEL2

LEVELCONTROL

CHANNEL1

LEVELCONTROL

Stereo/Mono:

Input/OutputData

InputConnector:

InputImpedance

OutputConnector:

OutputImpedance:

DCOutputOffset:

OutputSignalModes

Stereo:

Bridge-Mono:

Parallel-Mono:

Protection

TurnOn:

Construction

Cooling

Athree-positionbackpanelswitchisusedtoselectStereo,Bridge-Mono

orParallel-Monomode.

BalancedXLRconnector.

:Nominally20kohms,balanced;10kohms,unbalanced.

Twosetsofcolor-coded5-waybindingposts(forbananaplugs,

spadelugsorbarewire)andtwosetsofspeakonconnectors.

Lessthan10milliohmsinserieswithlessthan2microhenries.

Lessthan10millivolts.

Balanced,two-channel.

Balanced,single-channel.Channel1inputsareactive;Bothchannel

volumecontrolsareavailable.

balanced,single-channel.Channel1inputsareactive;Bothchannel

volumecontrolsareavailable.

DPSeriesamplifiersareprotectedagainstshortedcircuitsormismatched

loads,overloadedpowersupplies,excessivetemperature,chaindestruction

phenomena,inputoverloadandhighfrequencyblowups.Theyalsoprotect

loudspeakersfrominputandoutputDCandprovideprotectionfromturn-on/turn-off

transients.

Ifoperatingconditionsareunreasonable,thepatentedcircuitryproportionallylimitsthe

driveleveltoprotecttheoutputtransistors,particularlyinthecaseofelevated

temperature.Athermalswitchimbeddedontheheat-sinkprotectstheoutputdevice

fromoverload.Intherareeventthatatransformeroverheats,thethermalswitchturns

thepoweroff,waitsuntiltheunithascooledtoasafetemperatureandthenresetsitself.

Fiveseconddelaywithnodangeroustransients.ContactDIGISYNTHETIC

AudioInc.ifyouneedtochangethedelay.

Durableblackfinishonsteelchassiswithspecial"flow-through"ventilationfromrear

paneltofrontpanels.

:Internalheatsinksandtwo80mmhighspeedlownoisecoolingfanwithauto

speed-controlforced-aircoolingforrapid,uniformheatdissipation.

Page10

Inanefforttoprovideyouwithasmuchinformationaspossibleaboutthehigh

power-producingcapabilitiesofyouramplifier,wehavecreatedthefollowing

powermatrices:

needtochangethedelay.

~220V50/60Hz

FUSE:T10A FUSE:T12A FUSE:T15A

DP450

300W

500W

900W

300W

500W

20Hz-20kHz+/_0.5dB

+/_0.1degreesfrom10Hzto20kHzat1watt

>60dB

+0dB/-0.3dBfrom20Hzto20kHzat1watt

≤Ω

0.01%RatedPower@81kHZ

≤Ω

0.01%RatedPower@8

>98dB

40v/s(Stereo)

>300@1kHz/8ohms

10K/20Kohms,unbalancedorbalanced

56cmx47cmx15cm

Dimensions:(

ApproximateWeight:

Standard56cmrackmountwidthElARS-310-B),15cmheightand47

cmdepthbehindthemountingsurface.

Centerofgravityis10inches(25.42cm)behindfrontmounting

surface.

Page11

5.Service

Topreventelectricshock,donotremovecovers.Nouserserviceableparts

inside.Referservicingtoaqualifiedtechnician.

5.1WorldwideService

Thisunithasverysophisticatedcircuitryandshouldonlybeservicedbyafullytrained

technician.

Thisiswhyeachunitbearsthefollowinglabel:

Servicemaybeobtainedfromyourlocalauthorizedagent.Toobtainservice,simply

presentyoursalesreceiptasproofofpurchasealongwiththedefectiveunittoan

authorizedagent.Theywillhandlethenecessarypaperworkandrepair.Rememberto

transportyourunitintheoriginalfactorypackaging.

1.Toensurethesafetransportationofyourunittotheauthorizedagent,shipitinan

originalfactory-packingcontainer.

2.shiptheunitinanykindofrack.Ignoringthiswarningmayresultinextensive

damagetotheunitandtheequipmentrack.Accessoriesarenotneeded.Donotsend

theinstructionmanual,cablesandanyotherhardware.

Donot

Page12

CAUTION

DIGISYNTHETIC DP Series User manual

Brand: DIGISYNTHETIC

Model: DP Series

Category: Musical Equipment

Type: User manual

This manual is also suitable for

DP45O

DIGISYNTHETIC DP Series is a professional power amplifier designed to meet the demands of even the most critical sound reinforcement professional. It features:

Rugged, road-worthy construction
Patented Output Device Emulation Protection
High damping factor for superior control over low frequency drivers
Safe with any load. Bridge-Mono and Parallel-Mono modes offer optimal load-matching performance.
Complete protection against shorted outputs, mismatched loads, overheating, DC input/output and high frequency overload

With its powerful sound and wide range of features, the DIGISYNTHETIC DP Series is the perfect choice for a variety of applications, including:

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