MarkBass MoMark AMP FRAME 250 Owner'S Manual Download Page 3

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2.MOMARK MODULES ASSEMBLY INSTRUCTION

Prior to installing and/or removing modules, be sure to turn 

the unit off AND unplug it from the power source.

Do not connect the unit to a power source unless all three 

modules are installed in the amp frame.

Insert the tool (1) supplied with the modules into the two 

holes on the front panel of the module.

 

 

Slide each module right-side-up into the  

 

 

amp frame. Be careful to insert each  

 

 

 

module into the proper slot!  

 

 

 

The PRE module goes in the  

 

 

left slot (2); the EQ module goes in the  

 

 

center slot (3); and the MASTER module  

 

 

in the the right slot (4).

 

For each module fasten the two  corresponding 

upper screws and two lower screws (5).

To disassemble a MoMark and remove the modules, repeat  

the operations above in inverse order. 

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3. MOMARK REAR PANEL

SPEAKER OUT

The MOMARK AMP FRAME can be connected to one or two speaker cabinets. The high-quality Neutrik SPEAKON COMBO jacks (2) accepts either a 
SPEAKON or a 1⁄4” speaker cable. Do not use instrument cables. The minimum load is 4 ohms. If you connect two cabinets, the impedance of each 
cab must be 8 ohms or higher. If you connect a 4 ohm cabinet, you cannot connect a second cabinet. 

LINE OUT

This balanced XLR (8) output sends a balanced signal to the mixing console or snake in live and studio situations.

GROUND LIFT

Occasionally when you’re playing live and using the LINE OUT (8), the soundman will detect a hum from your amp’s signal. This is almost always due 
to a grounding problem related to your power source; you will likely eliminate this hum simply by pressing the GROUND LIFT (7) button.

PRE/POST EQ

This button (6) determines whether the signal that leaves the XLR LINE OUT (8) is affected by your amplifier’s EQ settings or not. In most cases, you 
will find that sound engineers prefer to receive a pre-EQ signal. Note that the line out signal includes whatever effects you’ve connected through 
the effects loop.

TUNER OUT

The TUNER OUT (3) is an unbalanced signal that can be sent to a tuner, allowing you to tune as you play without passing your signal through pedals, 
which can degrade the quality of your signal. You can also use this output to send your signal on to another amp, or any kind of recording unit that 
doesn’t require a balanced signal.

EFFECT SEND AND RETURN

If you use effect pedals or rack gear, you can route them through the SEND EFFECT (5) and RETURN EFFECT (4) on the rear panel of the amp. The 
effects loop is wired in parallel—this means that if something happens to your effects chain (a battery dies or a cable gives out, for example) while 
you’re playing, you will not lose your main signal. If desired, however, the effects loop can be easily modified by authorized service personnel to 
operate in series.

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