MMSR 3-Knob 3-Band Preamp - Bass Pickups | Preamps

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MID SWEEP 01 TheMIDSWEEP01isastand-alonemidcontrolwhichcanbeusedonitsownorcascadedin conjunctionwithothermodules,includingadditionalMIDSWEEP01s.Thesweepfrequency bandisswitchable,viaDILswitchesonthecircuitboard,betweentwooverlappingranges. ! MIDLEVEL&FREQUENCY ! BOOST/CUT(+/-12dB) ! ! The upper knob sets the amount of Mid boost or cut at frequencies according to the setting of the Frequencyknob.Themidwayindentisthe'flat'setting. FREQUENCY(100Hz-1kHz or 200Hz-2kHz) The lower outer ring sets the continuously variable Mid frequencies for boost or cut. DIL switches on the circuit board allow low or high ranges to be set. Both switch sections should be set to ON for the Low RangeandbothsettoOFFfortheHighRange. POWER Thisunitcanbepoweredfrom9-18VoltsDC. HIGH LOW DIL SWITCH Set Both MID FREQUENCY RANGE LINKED ON PCB 9-18V +VE OUTPUT GND INPUT Hot Cold
! ! POWER Thisunitcanbepoweredfrom9-18VoltsDC. INSTALLATION ! ! ! ! ! ! ! ! ! Ifnecessary,removetheoldelectronicsleavingthepickupwires,andanyothers,suchasgroundand batterywires,withplentyoflength. The single pot is the Volume and its thread is 7.0mm size. Fit into its hole leaving the rubber spacer ringsinplaceiftheholesaretheoriginallargersize.Tightenonceinplace. Mountthe bass/treble circuitboard inthe next hole,which isthepositionfor the treble in theoriginal3 knob plate. (See BTB-MM diagram in order to recognise the bass/treble circuit board, which has two barepinsatoneend,forthepickupinput) Mountthemidsweepstackintheholeusedforthebasscontrolintheoriginal3knobplate. Mountthepre-wiredjackintothesameholeastheoriginaljack. Connectthepickupswirestothebass/treblecircuitboard,accordingthetheBTB-MMdiagram. Abatteryclipisprovidedwiththepreampallowingittobepowereddirectly.Butmostbasseswillhave aseparatebatterycompartment.Inwhichcase,cutofthebatteryclipandjointheredandblackwires from the the preamp tothose in the bass. Before joiningthe wires, slip the heatshrinksleevesover the wires.Afterthejointshavebeenmade,thesleevingshouldbeslidoverthejointsandheatedwithahot soldering iron, or other localised heat source, held in close proximity.(The heatshrink sleeves can be foundthreadedontheblackgroundwire) Connect the black ground wire from the jack to any ground wires in the bass, such as the one to the bridge. Onceallisproventobeworkingcorrectly,fittheknobstotheirappropriateshafts,andrefitplate.
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MMSR 3-Knob 3-Band Preamp - Bass Pickups | Preamps

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