1.LOUDSPEAKEROUTPUTS
WARNING!Neverusethe amplifierwithouta loadattached!
Therearetwoparallelloudspeakeroutputjacksprovidedfor connectionto
speakerextensioncabinet(s).Pleasealwaysensurethat theamplifier'soutput
impedanceselectorisset correctly(seeitem2) and ALWAYSensureyouuse
goodqualityspeaker(unshielded)cables.NEVERuseguitar(shielded)cables.
Alwaysusea non-screenedMarshallapprovedspeakerleadwhen connectingan
extensioncabinet.
2.OUTPUTIMPEDANCESELECTOR
Matchestheamplifier’soutputtotheload (speaker)impedance.
Your1959RRshouldbecompletelypowereddownbeforethe OutputImpedance
Selectoristurned.
Asis thecase withany Marshallall-valveamplifieritis imperativethat:a)the
amplifieris connectedtoa load whilstinoperationandb) the impedanceselected
onthe amplifiermatchesthetotalimpedanceofthe extensionspeakercabinet(s)
beingused.
1x16Ohmcabinet-Selectoron 16Ohm - Useeitherspeakeroutput
2x16Ohmcabinets-Selectoron 8 Ohm- Use bothoutputs
1x8Ohmcabinet- Selectoron8 Ohm - Use eitheroutput
2x8Ohmcabinets- Selectoron4 Ohm - Useboth outputs
1x4Ohmcabinet- Selectoron4 Ohm - Use eitheroutput
WARNING!Do NOTuse anyother combinationof cabinetsand/or
impedances.Doingso mayresultin damageto theamplifier!An extension
speakercabinetwith animpedanceof lessthan4 Ohms, ortwo extension
cabinetsof4Ohms or lessshouldNOT beused withthis amplifier.
Failuretocomplywithany ofthe pointsraisedin thissectionwillresultin damage
tothe amplifier.
3.MAINSSELECTOR
Matchestheamplifier’smainstransformertothe
incomingmainsvoltage.
Your1959RRshouldalwaysbecompletely
powereddownbeforethemainsselectoris
turned.
WARNING!ALWAYSensurethatthisrotaryselectorisset to thecorrectmains
voltageapplicableforthe countrywherethe 1959RRisbeingused.If you donot
know,consultyourauthorisedMarshalldealer.Adjustingthe selectorfrom
230V/220Vto 120V/110V/100Vor vice-versawillrequirethemainsfuse
(item5)to be changedtothe correctvalueas detailedonthe rearpanel.
4.MAINSINPUT
Yourampis providedwithadetachablemains(power)lead,whichis connected
here.Thespecificmainsinputvoltageratingthatyouramplifierhasbeen builtfor
isindicatedonthe backpanel.Beforeconnectingforthe firsttime,pleaseensure
thatyouramplifieriscompatiblewithyourelectricitysupply.Ifyouhaveany
doubt,pleasegetadvicefroma qualifiedtechnician.YourMarshalldealerwill
helpyouin thisrespect.
5.MAINSFUSE
Thecorrectvalueofmainsfuse is specifiedonthe rearpanelof the amplifier.
NEVERattempttobypassthe fuseor fitone of theincorrectvalue.
6.H.T.FUSE
Thecorrectvalueofthis H.T.fuseis specifiedonthe rearpanel ofthe amplifier.
NEVERattempttobypassthe fuseor fitone of theincorrectvalue.
TechnicalSpecification
PowerOutput-100WRMS
Weight-21.4kg
Size-740mmx 270mmx 210mm
*EUROPEONLY -Note:
Thisequipmenthasbeentestedand
foundtocomplywiththe requirementsoftheEMC Directive
(EnvironmentsE1,E2and E3 EN55103-1/2)andtheLow Voltage
DirectiveintheE.U.
*EUROPEONLY- Note:
ThePeakInrush
currentforthe1959RRis38 amps.
1.POWERSWITCH
Thisisthe On/Offswitchfor mainspowerto theamplifier.Itwill lightup when
youramplifierisreceivingthecorrectmainspowerandis switchedon.It willnot
belitwhen theamplifieris switchedoffand/oris not receivingmainspower.
Note:Pleaseensuretheamplifierisswitchedoffand unpluggedfromthe mains
electricitysupplywheneveritis moved.
2.STANDBYSWITCH
TheStandbySwitchisused inconjunctionwiththe PowerSwitch(item1) to‘warm
up’theamplifierbeforeuseand to prolongthelife ofthe outputvalves.When
poweringup the amplifieralwaysengagethePowerSwitchfirst,leavingthe
Standbyswitchon‘Standby’.Thisallowstheapplicationofthevoltagerequired
toheatthe valvesto theircorrectoperatingtemperature.Afterapproximatelytwo
minutesthevalveswillhavereachedthe correctoperatingtemperatureandthe
StandbySwitchcanbeengaged.In orderto prolongvalvelife,theStandby
Switchaloneshouldalsobeused to turnthe amplifieronand offduringbreaksin
aperformance.Also,whenswitchingoff,alwaysdisengagetheStandbySwitch
priortothe mainPowerSwitch.
Note:Thefollowingfourcontrols-PRESENCE(4),BASS(5), MIDDLE(6)&
TREBLE(7)- areall shared,meaningthattheyall workon bothChannelI and
ChannelII.TheTreble,MiddleandBasscontrolsare highlyinteractiveand
alteringonecontrolcanchangetheway the othertwobehave.For thisreason,
experimentationisrecommended.
Randy’spreferredsettingsareshownon thepanel above.
3.PRESENCECONTROL
Thiscontroloperatesinthe1959RR’spowersectionandaddshigh frequenciesto
yoursoundbyalteringthe poweramplifier’snegativefeedback.Turningthis
controlclockwiseaddsmore edgeand ‘sparkle’toyoursound,makingit crisper
andmorecutting.
4.BASS CONTROL
Thisadjuststhebottomend,turningit clockwiseincreasestheamountoflow
frequenciesinthe sound.
5.MIDDLECONTROL
Thisadjuststhelevelof thoseall-importantmid-rangefrequencies.Turningit
clockwiseincreasesthemidsand fattensyoursound,givingit morepunch.
Turningitanticlockwisereducesthemids.
6.TREBLECONTROL
Thisadjuststhetop-end.Turningitclockwiseincreasestheamountofhigh
frequencies(treble)presentinthesound,makingyour tonebrighter.
Tone/Techtalk- The modifiedValve1stage
UnlikeastandardMarshall1959SuperLeadamplifieryourRandyRhoads
modelcontainsamodificationthatincreasesgainand thereforeextradistortion
withinthecircuit.Thismodification‘hot rods’theamplifiermakingit easiertopush
itintothe saturationlevelsnecessaryfor thesound thatRandyneededfor his
musicalstation.
Thechangeisvery simplebut effectiveandinvolves‘cascading’(feedingthe
outputofthefirst stageintothe inputof the secondstage)thetwo halvesof
valve1.Traditionally,eachhalfwouldserveas inputbuffer/firstgainstagefor the
twochannels,i.e.onehalffor channel1 andthe otherfor channel2, fromthere
theywouldseparatelyfeedtherespectivesignalstothenextstage whichwould
mixthem,furtheramplifythemand feedthem to thetone stack.
Cascadingvalve1 resultsin theguitarsignalbeingincreasedbyaround36dB or
60times,muchlargerthan it wouldnormallybeat thispoint inthe circuit.
Subsequentstagesthentry to amplifythislargersignalby similaramountsand
quicklyrunoutof headroomcausingthewaveformtodistortseverely.Thetwo
channelvolumesstillremainfunctionalafterthe modificationbut adoptdifferent
rolesfortheiraffecton the tone,allowingcontrolofthe extragainand volume.
Pluggingintochannel2routesthe guitarsignalthroughthewholecascadecircuit
whilepluggingintochannel1allowsyouto bypassthe cascadeanduse theamp
initsstandardformatwhere‘Volume1’ willfunctionasit normallywould.
StandardChannel2 formatis sacrificeddueto themodification.
7.VOLUMEI
ThiscontrolstheoveralloutputlevelofChannelI, turningitclockwiseincreasesthe
volume.Thischannelisvoicedfora highertrebleresponse.Infull cascademode,
thiscontrolstheamountofsignalamplifiedby thesecondhalf ofvalve1,thereby
actingasa crudemastervolumefor thewholecascadecircuitandcan alsobe
thoughtofasa furthergain controlforthe boostedsignalto thesubsequent
stagesofthe preamp.Instandardmodei.e.guitarpluggedinto channel1,it
functionsjustlike a normalunmodified1959SuperLeadvolumecontrol.
8.VOLUMEII
Fullcascademode.Thiscontrolstheamountof signalamplifiedbythe firsthalfof
valve1that isfed to the secondhalf,therebyactingasa gain controlforthe
cascadecircuititself.
9.HIGH SENSITIVITYINPUTFOR CHANNELI
Thisisthe ‘highsensitivity’guitarinputforChannelI- the brighterof thetwo
channels-andis the mostcommonlyusedinputon standardunmodifiedmodels.
Alwaysusea highqualityscreenedguitarlead.NOTE- Pluggingintothisinput
bypassesthe cascadeandthe ampfunctionsin standardformat.
10.LOW SENSITIVITYINPUTFOR CHANNELI
Thisisthe ‘lowsensitivity’guitarinputforChannelI. Itis 6dB lower(half)thanthe
‘highsensitivity’inputandresultsinlessgain capabilitywhichmay be requiredfor
guitarswithveryhotoutputpickupsoractivecircuitryonboard.NOTE- Plugging
intothisinputalsobypassesthecascadeandthe ampfunctionsinstandardformat.
11.HIGHSENSITIVITYINPUTFORCHANNELII
Pluggingintothisinputenablesthefull cascade.
12.LOW SENSITIVITYINPUTFOR CHANNELII
Pluggingintothisinputenablesthefull cascade.Itis 6dBlower(half)than the
‘highsensitivity’inputandresultsin lessgain capabilitywhichmaybe requiredfor
guitarswithveryhotoutputpickupsor activecircuitryonboard.
8
1959RR front panel featuresFront panel - Randy’spreferredsettingsshown
Rear panel1959RR rear panel features