MARCUSRETRO01
TheMARCUSRETRO01isdesignedtofitdirectlyintoMarcus4signaturebasseswithout
modification.Itshighqualitycircuitusesthreestackedknobsandincludesanactiveblend
circuitplusa3bandequaliserwithbass,variablefrequencymid,trebleandbrightfunction.
Theactiveblendcircuitpreventsthelossassociatedwithmanypassivebasseswhere,when
bothpickupsareupfull,thesignalfromonepickupfeedsintotheotherandviceversa.
However,aswitchisincludedtoallowapassiveequalmixofbothpickups.Asecondswitch-
basic"get-you-out-of-trouble"passivemodeisincludedincasethebatterydiesincrucial
circumstances,butthismodeallowslotsofusefulsettingstoo.
(Knobstacknearesttheneckpickup)
(Themiddleknobstack)
(Theknobstacknearestthejack)
Note: Theversionwithaplatewillfitthe4stringbassonly.The'electronicsonly'versioncan
befittedtoaMarcusV,butusingtheexistingplate,whichwillrequireanadditionalholeforthe
PickupsToggle.
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VOLUME&BLEND
BASS&TREBLE
MIDLEVEL&FREQUENCY
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VOLUME
BLEND&PICKUPSSWITCH
TREBLE(+12dB@1k5Hz,-12dB@1kHz)
BRIGHT(+8dB@7kHz)
BASS(+15dB@40Hz)
BOOST/CUT(+/-12dB)
FREQUENCY(150Hz-3kHz)
TheupperknobistheVolume.Thisknobhasactivecircuitryafteritsothatthefeedtoyouramplifierisa
lowimpedancedrive.
ThelowerouterknobistheBlendbalanceforthepickups.Turnitfullyclockwisefortheneckpickupalone
andfullyanti-clockwiseforthebridgepickup.Themidwayposition,whichhasanindent,givesanequal
mixofbothpickups.Thebalancebetweenthepickupsiscontinuouslyvariablewithprogressivelevel
compensationtowardsthesinglepickupsettings.
Theswitch(bytheblend)mustbesetpointingtowardsthejackfortheBlendto
function.(See&diagramsfordetailsofhowthisswitchworks)
TheupperknobistheTreblecontrolwithboostandcut.Thecentral'flat'positionisindented.Thecut
settingsworkonlowerfrequenciescomparedtoboosttogiveadeepersoundwhenthetopisrolledoff.
PulltheTrebleknobfortheBrightsetting.
ThelowerouterknobistheboostonlyBasscontrol.Thefrequencybandofboostgetsprogressively
lowerastheboostisincreased.Anindentmidwayisincludedtoaidthesettingofthiscontrol.
TheupperknobcontrolstheamountofMidboostorcutatfrequenciesaccordingtothesettingofthe
Frequencyknob.Themidwayindentisthe'flat'position.
ThelowerouterknobiscontinuouslyvariableandsetstheMidfrequenciesforboostorcut.
Continuedover:
Important:- Pickups
ACTIVEPASSIVE
Active/PassiveRetro-FitforJ-StyleBasses
