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From
Jim Marshall
I
wouldliketotakethisopportunitytopersonallycongratulateyouon
choosingthisJMD:1amplifierfromMarshall.
Weprideourselvesonourabilitytoinvent,innovateandcreatenew
waysforguitariststofindtheirownsound,whetherthatbethrough
all-valve,solid-stateorhybridtechnologies.
Firstreleasedin1992,theJMP-1pre-ampofferedguitaristsunrivalled
flexibility,withtrueMarshalltoneatitsheart.Itprovedtobeagreat
success!EversincetheJMP-1striumph,wehavebeeneagertosee
how technologycouldbepushedevenfurtherand,asaresult,weare
pleasedtointroduceitssuccessor,theJMD:1Series.
TheMarshallR&Dteamhavealwayskeptakeeneye(andofcourse
theirears)onnewtechnologies,andhaveimplementedthemwhenthey
wererightfortheproduct.Ournumberonerule-neversacrificetonefor
technology’ssake.Onlynowhaveallthecomponents,state-of-the-art
technologyandnearly50yearsofexperiencecometogethertocreate
thisexcitingamplifierrange.TheJMD:1istheresultofaunique
collaborationwithourfriendsatSoftube
T
M
,leadingtoatruedigital
pre-amp,integratedintoaproductthatIamproudtoseetheMarshall
nameon.PartneredwithatraditionalMarshallvalvepoweramp,it
becomesthemostflexibleandfirst,totallyprogrammablevalvedigital
hybridamplifierserieswehaveevermade.Neverbeforehassucha
varietyofgreatqualitytonebeenavailableinoneproduct.
IwouldliketowishyoueverysuccesswithyournewMarshall.Welcome
tothefamily.
YoursSincerely,
DrJimMarshallOBE
1
PresentingtheJMD:1Series.
JMD100 100Watthead
J
MD50 50Watthead
JMD102 100Watt2x12"combo
JMD501 50Watt1 x 12"combo
I
mmenseversatility,extensivetonalcontrolandthat
unmistakableMarshallsoundisnowyours.TheJMD:1is
quitesimplyoneofthemostcomprehensiveand
s
ophisticatedamplifiersMarshallhascreatedtodate,
combiningstate-of-the-artdigitalpre-amptechnologywith
studioqualityeffectsandsheerEL34valvepower.Working
i
nclosepartnershipwithSwedishsoftwarehouse
Softube
TM
,theMarshallteamhavecraftedthelatest
evolutionarybenchmarkinhybridamplifiersthatpicksup
wheretherenownedJMP-1leftoff.
AttheveryheartoftheJMD:1SeriesisMarshall's
proprietaryEL34powerampsection.Afundamental
elementinmanyofMarshall'sprofessionalall-valve
amplifiers,thissteadfastpowerstagedesignhasbeen
drivingtheMarshallsoundfordecades.Whenitcameto
creatingtheall-newdigitalpre-amp,theMarshallengineers
knewithadtoleadratherthanfollowwhathadcome
before- thatistobethefirsttooffertrulygreatvalvetone.
EnterSoftube
TM
andtheirpatentedNaturalHarmonic
Technology
TM
,usedfortheveryfirsttimeinaguitar
amplifier.Thisgroundbreakingtechnologyactuallymatches
thedynamicreactionsofthevalveamplifierandthewayit
behavestothevariousintensitiesofplaying,justliketheir
analoguecounterparts,andensuresthateverynotefeels
right.
SwitchingbetweentheJMD:1's16pre-ampoptionsalso
affectsthewayinwhichthefrontpanelcontrolsrespondto
userinput,suchastheEQsectionwhichautomatically
reconfigurestomatchtheoriginaltopologyofthechosen
pre-amp.Thevalvepower-ampsanaloguecircuitryisalso
a
lteredtocomplementthedifferentpre-amps,with
optimumresonancevaluesautomaticallyselectedto
maximisetheJMD:1'sresponse.Theselectablepre-amps
a
redividedinto4sections‘Clean’,‘Crunch’,‘Overdrive
a
ndLead’.Eachpre-amphasbeenchosenforits
individualcharacteranditsabilitytocomplement,yetatthe
sametime,differentiateitselffromtheothers.
Thedigitalnatureofthepre-ampenablestheJMD:1to
housebothmodernandclassictonesfromavarietyof
M
arshallamplifiers,suchasthe1959,JCM800,JCM2000,
JVMandofcoursetheJMP-1.Theseandmanyothers
haveprovidedtheJMD:1withacomprehensivecollection
oftones,transcendingtheentirehistoryofMarshall’s
heritage,particularlytheEL34years,duetotheon-board
valvepoweramp.Newsoundshavealsobeencreatedby
combiningamplifiertopologies,resultingintotallyunique
Marshalltones,exclusivetothisSeries!
TheJMD:1alsohastheabilitytostorecompletepre-amp,
EQandFXsettings.Thesepresetscanthenbeinstantly
recalledatanytimefromeitherthefrontpanel,the
suppliedStompware
TM
footcontrollerorMIDIsystemfor
maximumversatility. FurthertotheJMD:1'svastarrayof
featuresisaserial/parallelFXLoop,balancedXLR
EmulatedLineOut,Pre-AmpOut,LineInandHeadphones
socket.
TheJMD:1isthetotalstandalonesolutiontoanyguitarist's
requirements,fromliveperformanceandbandrehearsalto
bedroompracticeandsilentrecording.It’sallhereinthis
extremelypowerfulpackage;arealcuttingedgeMarshall
ampforthosenotboundbytraditionandreadytoembrace
aneweraofguitaramplification!
ENGLISH
Overview
NEVER useyourampwithouta(speaker)loadattached
whentheStandbySwitch(9)isintheOnposition.
1.Makesurethatthespeakercabinetsareconnectedto
thecorrectimpedanceLoudspeakerjacksontherear
panel(9).
RefertotheSpeakerOutputguideinthishandbookfor
specificsregardingimpedancematching.Whenusingan
extensioncabinetmakesurethatyou’reusingan
unshieldedspeakercableofgoodquality. Neverusea
screened(shielded)guitarcableforthispurpose.
2.EnsurethattheMasterVolumecontrol(6)onthefront
panelisinitiallysettozero.
3.Connectthesuppliedmains(power)leadintotheMains
Input(1)ontherearpanelfirstandthenintoanelectrical
outlet.
WARNING: Beforegoinganyfurther,makesureyour
amplifieriscompatiblewithyourelectricalsupply. Ifyou
haveanydoubt,pleasegethelpfromaqualified
technician,yourMarshalldealercanhelpyouinthis
respect.
4.PlugyourguitarintotheInputjacksocket(1)onthefront
panel.
5.TurnthefrontpanelPowerswitch(10)on.Thefront
panelpowerLEDwillilluminate(8).
Standby Switch & Silent recording (9)
TheStandbyswitchisusedinconjunctionwiththePower
switch(10)towarmup’theamplifierbeforeuse,andto
prolongthelifeoftheoutputvalvesandtomutethe
amplifierwhenrequired,suchaswhenyouarechanging
guitarsorforshortbreaksinperformance.
Whentheamplifierisinstandbymodethewholepre-
amplifiersectionisstillfunctionalwhilstthepoweramplifier
remainsinastandbystatus.Thisallowstheamplifiertobe
usedforsilentrecordingorpre-amplificationpurposes.
OnlywhentheStandbyswitch(9)issetto‘OFFcanthe
amplifierbeusedwithoutaload.Alwaysensurea loadis
connectedwhenswitchingtheStandbyswitchon.
Whenpoweringuptheamplifierwesuggestengagingthe
Powerswitch(10)first,leavingtheStandbyswitch(9)in
the‘Off’positionfortwominutestoallowthevalvestoheat
up.
6.Afterwaiting,engagetheStandbyswitch(9).
7.AdjusttheMasterVolume(6)toyourrequiredlevel-
yourampisreadytoplay.
Whenswitchingtheamplifieroff,alwaysdisengagethe
Standbyswitch(9)acoupleofsecondspriortothemain
Powerswitch(10).
Getting started and powering up
Follow all instructions and heed all warnings
KEEP THESE INSTRUCTIONS !
* EUROPE ONLY - Note:
This equipment has been tested and found to comply with the requirements of the EMC Directive
(Environments E1, E2 and E3 EN 55103-1/2) and the Low Voltage Directive in the E.U.
* EUROPE ONLY - Note:
The Peak Inrush current for the 50 Watt is 25 amps.
The Peak Inrush current for the 100 Watt is 25 amps.
Note:
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC rules.
These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates,
uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference
to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause
harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try
to correct the interference by one or more of the following measures:
*
Reorient or relocate the receiving antenna.
*
Increase the separation between the equipment and the receiver.
*
Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
*
Consult the dealer or an experienced radio/TV technician for help.
2


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