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The MARCUS RETRO 01 is designed to fit directly into Marcus 4 signature basses without
modification. Its high quality circuit uses three stacked knobs and includes an active blend
circuit plus a 3 band equaliser with bass, variable frequency mid, treble and bright function.
The active blend circuit prevents the loss associated with many passive basses where, when
both pickups are up full, the signal from one pickup feeds into the other and vice versa.
However, a switch is included to allow a passive equal mix of both pickups. A second switch -
basic "get-you-out-of-trouble" passive mode is included in case the battery dies in crucial
circumstances, but thismodeallows lots of useful settings too.
Note: The version with a plate will fit the 4 string bass only. The 'electronics only' version can
be fitted to a Marcus V, but using the existing plate, which will require an additional hole for the
Pickups Toggle.
VOLUME & BLEND
!
VOLUME
!
The upper knob is the Volume. This knob has active circuitry after it so that the feed to your amplifier is a
low impedance drive.
BLEND & PICKUPS SWITCH
!
The lower outer knob is the Blend balance for the pickups. Turn it fully clockwise for the neck pickup alone
and fully anti-clockwise for the bridge pickup. The midway position, which has an indent, gives an equal
mix of both pickups. The balance between the pickups is continuously variable with progressive level
compensation towards the single pickup settings.
Important:-
The
function. ( See
ACTIVE PASSIVE
BASS & TREBLE
!
TREBLE (+12dB @ 1k5Hz, -12dB @ 1kHz)
!
The upper knob is the Treble control with boost and cut. The central 'flat' position is indented. The cut
settings work on lower frequencies compared to boost to give a deeper sound when the top is rolled off.
BRIGHT (+8dB @ 7kHz)
!
Pull the Treble knob for the Bright setting.
BASS (+15dB @ 40Hz)
!
The lower outer knob is the boost only Bass control. The frequency band of boost gets progressively
lower as the boost is increased. An indent midway is included to aid the setting of this control.
MID LEVEL & FREQUENCY
!
BOOST/CUT (+/- 12dB)
!
The upper knob controls the amount of Mid boost or cut at frequencies according to the setting of the
Frequency knob. Themidway indent is the 'flat' position.
FREQUENCY (150Hz - 3kHz)
!
The lower outer knob is continuously variable and sets the Mid frequencies for boost or cut.
Continued over:
MARCUS RETRO 01
Active/Passive Retro-Fit for J-Style Basses
(Knob stack nearest the neck pickup)
Pickups
switch (by the blend) must be set pointing towards the jack for the Blend to
&
diagrams for details of how this switch works )
(Themiddle knob stack)
(The knob stack nearest the jack)
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Related Manuals for East MARCUS RETRO 01
Summary of Contents for East MARCUS RETRO 01
- Page 1 MARCUS RETRO 01 Active/Passive Retro-Fit for J-Style Basses The MARCUS RETRO 01 is designed to fit directly into Marcus 4 signature basses without modification. Its high quality circuit uses three stacked knobs and includes an active blend circuit plus a 3 band equaliser with bass, variable frequency mid, treble and bright function.
-
Page 2: Active Passive Switch
ACTIVE PASSIVE SWITCH (By the jack) Towards the jack for active, the opposite for passive PASSIVE TONE (Single Knob) ! PASSIVE TONE Conventional passive tone which acts directly on the output of each individual pickup. Since pickup signals are separated until they reach the electronic blend stage, a dual pot is required in order that there is an individual passive tone section for each pickup. -
Page 3: Current Version
ACTIVE TREBLE VOLUME Boost & Cut Boost & Cut BLEND BOTH BASS BLEND PU's Frequency Boost Only Pick-Ups Knob Passive Setting Equal Mix PASSIVE TONE Operates in Active PUSH FOR ACTIVE BRIGHT Pull Knob CURRENT VERSION PASSIVE VOLUME BRIDGE BOTH PU's Passive Equal Mix... -
Page 6: Screw Terminals
SCREW TERMINALS Note: WIRE COLOURS MAY VARY. Make sure the MIDDLE WIRE is connected (Pickup Wires & Passive Tone) to the correct terminal. The outside wires can be connected either way around. - Page 7 GUARANTEE Your East product is guaranteed to be free from defects in materials and workmanship for a period of one year from the date of original purchase. If during the guarantee period your product becomes faulty due to defective materials or workmanship then the unit will be repaired or replaced without charge for parts or labour at the discretion of E-Pro according to the conditions below.