Marshalls plc MIDI JMP-1 Manuale Utente

Left and right jack sockets for connection from the 
outputs of an external effects processor.  If using a 
mono effects processor the left hand return socket only 
should be used.  In this instance both the left and right
master outputs and speaker emulated outputs will now 
be working in mono. 

Provides level selection of  +4dB or -10dB to match the 
level of external effects processors.

Output for connection to the input of the external effects
processor.

Connection point for optional Marshall four way 
footswitch to give 4 patch selection.

Sends outgoing MIDI messages from the JMP-1.

Sends out MIDI messages identical to those coming in 
through the MIDI IN terminal.

Terminal to receive incoming MIDI messages from 
external MIDI device.

Your JMP-1 is provided with a detachable mains (power) 
lead which is connected here. Before connecting for the 
first time, please ensure that your JMP-1 is compatible with
your electricity supply. If you have any doubt, please get 
advice from a qualified person. Your Marshall dealer will 
help in this respect.

When switching on the JMP-1, the unit will run through an
initialising process and will then default to the patch number that
was selected when the JMP-1 was last switched off (Fig1).  Your
JMP-1 is now ready for action.

Your JMP-1 is capable of producing a vast array of  different tones, stored in the 100 available
patches.  The simplicity of creating and storing these sounds is a major advantage and feature of the
pre-amp.  A “Patch” is a combination of all the programmable elements that you put in, therefore if all
tone and volume selections are at 0, no sound will be produced.  Each patch is made up of:

(A) The channel selection i.e. OD1, OD2, Clean 1, Clean 2 & Bass Shift

(B) The individual volume, gain, tone and effects levels that you have selected.  

The first step is to select a patch by pressing the patch key (5) using the rotary data control (7) to reach
the desired patch number.  The next stage is to “build” your required sound, firstly by selecting the
channel OD1, OD2, Clean 1 or Clean 2 with or without bass shift, then by selecting the volume, gain,
tone and effects levels.  These controls work in exactly the same way as a normal Marshall amplifier,
where increasing the gain brings in more overdrive and the tone selections interact to “shape” the
sound. 

The JMP-1’s controls are there to be used to the full and by experimenting with all the extremes you will
quickly understand it’s capabilities and build your own library of sounds.

Fig 1 Patch

5