JMP-1 HANDBOOK ENGLISH From The Chairman I would like to thank you personally for selecting the JMP-1 MIDI Pre-amp. As our first venture into MIDI controlled guitar equipment, many hours of development have been spent ensuring that it fulfils the functions that you really need to cope with todays widely varied playing environments. We have always worked very closely with guitarists from many different fields and their valuable input has been an essential ingredient in the creation of the JMP-1. My design team is made up of guitar players who fully understand the needs and realities of guitar performance. They have had a free hand in making this pre-amp sound quite simply the best. My confidence in their ability is absolute and it gives me great pride to see and hear the traditions of Marshall improved through progress, whilst retaining the classic tonal authority that is the Marshall hallmark. Please read this handbook carefully before operating your JMP-1 so that you can fully enjoy the advantages of our research and technology. 1 ! A. B. C. D. E. WARNING! - Important safety instructions WARNING: This apparatus must be earthed! PLEASE read this instruction manual carefully before switching on. ALWAYS use the supplied mains lead, if a replacement is required please contact your authorised Marshall Dealer. NEVER attempt to by-pass the fuses or fit ones of the incorrect value. DO NOT attempt to open the apparatus, there are no user serviceable parts. Refer all servicing to qualified service personnel including replacement of fuses and valves. The internal battery is not user changable. Servicing is required when the apparatus has been damaged in any way, such as when the power supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally or has been dropped. F. NEVER use an amplifier in damp or wet conditions. No objects filled with liquids should be placed on the apparatus. G. ALWAYS unplug this apparatus during lightning storms or if unused for long periods of time. H. PROTECT the power cord from being walked on or pinched particularly at plugs, convenience receptacles and at the point where they exit from the apparatus. ENGLISH Note: This equipment has been tested and found to comply with the requirements of the EMC directive (Environments E1, E2 and E3 EN 55103-1/2) and the Low Voltage directive in the E.U. EUROPE ONLY - Note: The Peak Inrush current for the JMP-1 is 800mA. Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: Reorient or relocate the receiving antenna. Increase the separation between the equipment and the receiver. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. Consult the dealer or an experienced radio/TV technician for help. CAUTION: Any changes or modifications not expressly approved by the party responsible for compliance may void the users authority to operate the equipment. Note: It is recommended that all audio and Midi cables used to connect to the JMP-1 are of a high quality screened type. These should not exceed 10 metres in length. WARNING: Always ensure free movement of air around the apparatus! Particular care should be taken if installing the apparatus in a rack, so that the flow of air is not impeded. USA ONLY - DO NOT defeat the purpose of the polarised or grounding type plug. A polarised plug has two blades with one wider than the other. A grounding type plug has two blades and a third grounding prong. The wide blade or the third prong are provided for your safety. When the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet. Follow all instructions and heed all warnings KEEP THESE INSTRUCTIONS ! Contents Description Introduction JMP-1 Front Panel Features Rear Panel Features When You Switch On Creating Your Sounds Storing Your Sounds Sound Selections Factory Sounds Some Notes on MIDI MIDI Channel MIDI Mapping Four Way Footswitch To Re-initialise The JMP-1 System Exclusive MIDI Implementation Chart Connection Diagram Front and Rear Panel Layout Personal Sound Setting Table Page number 3 3 4-5 5 5 6 6 7-8 9 9 10 11 11 11-12 12 A B C 2 Introduction ENGLISH The relationship between the guitarist and amplifier has been our prime concern since the earliest Marshall's were produced. We always aim to give that extra edge, which can help to inspire the player, fuelling creativity and the ability to express. Advances in technology have allowed us to modify and enhance this basic principle for the benefit of the musician. However, we have never lost sight of that extra emotional drive that only valves are capable of producing. The whole character of our unique sound emanates from the breathing full bodied pure tone of the valve. Your JMP-1 MIDI pre-amp is a carefully designed coalescence between modern MIDI technology and classic Marshall valve circuitry. It's many tones are all valve generated and presented in a way that is both comfortable and familiar to guitar players. The digital control capabilities add a new degree of flexibility to the way in which the tones can be switched and processed. The advantages provided by this level of control are truly astounding. After studying the manual and with a little practical exploration, you will find an unbelievable range of sounds and will very soon wonder how you managed without MIDI. The only limit is your own imagination. JMP-1 Front Panel Features 1. Input Socket 2. Headphone Socket Connect the guitar to this socket. For the connection of stereo headphones. Headphones with an impedance of 600 Ohms will give the best performance. Connecting headphones does not disable the outputs of the pre-amp. Controls the volume level from the master left and right outputs (Item 25). The display is split into two sections and shows patch and data information. Push this key to enter patch selection mode (0-99). The patch key LED will illuminate to indicate patch mode. Use this key to store a patch in the memory. 3. Output Level Control 4. Display 5. Patch Key 6. Store Key Operational Note: Push once and the store key LED will flash. The data entry control (7) can now be used to change the storage location. Pushing patch or a parameter key will abandon the store. Push the store key again to complete the store. (Also see section Creating Your Sounds). 7. Data Entry Control 8. Volume Key This rotary control is used to increment/decrement data information, or to select a patch in patch mode. Push this key to adjust the patch volume level between 0 and 20. The volume key LED will illuminate to indicate that the volume parameter has been selected. The data display will show the current value. The value can then be adjusted using the rotary data entry control (7). Push this key to adjust the level of gain between 0 - 20. These keys should be combined to shape the Bass, Middle, Treble, and Presence tone parameters. They can all be adjusted between -6 and +6. 9. Gain Key 10-13. Tone Control Keys 3 14. Effect Key This key varies the mix of the stereo effects loop between 0 and 12. At 0 only the direct signal is heard and at 12 only the effected signal is heard. When at 12 the loop is effectively running in series i.e. no direct signal. This is ideal for use with a graphic equalizer or compressor limiter. As the effect parameter level is reduced, more direct signal is introduced as with a parallel loop. This is best suited to Chorus, Delay, Reverb etc. This key selects overdrive 1, a warm vintage drive reminiscent of Marshall Super Lead amps through to modern day Master Volumes. Selects overdrive 2. This a tightly focused high gain drive which can be smooth or aggressive depending on the E.Q. and gain settings. This is a subtle low frequency character control which can be switched in or out of any sound selection. Selects Clean 1, which has a full warm character and pure vintage tone. Selects Clean 2. This has a bright sparkling tone ideal for clean picking and ringing chords. The mapping function enables the mapping of incoming MIDI patch messages to internal patches and outgoing MIDI patch numbers to external devices. (See MIDI mapping). This key selects the MIDI Channel on which the JMP-1 transmits and receives MIDI information. On/Off switch for mains power. Please ensure the apparatus is switched off and unplugged from the mains electricity supply before being moved. ENGLISH 15. OD1 Key 16. OD2 Key 17. Bass Shift 18. Clean 1 Key 19. Clean 2 Key 20. MIDI-Mapping Key 21. MIDI Channel Key 22. Power Switch Rear Panel Features 23. Emulated Outputs Left and right outputs featuring Marshall speaker emulation. The volume level from these outputs is controlled by the volume level parameter key (8) not by the output level control (3). Operational Note: Stereo Speaker Emulation. The Marshall speaker emulation circuit is a special filter which gives a signal virtually identical in sound to a speaker cabinet. This allows you to link directly to the PA and obtain a stunning direct sound in a live situation. In the studio it will give a true guitar tone direct to tape. 24. Emulated Level Selection Switch Selection switch providing +4dB or -10dB output levels on the speaker emulated outputs. 25. Master Outputs 26. Master Level Selection Switch Left and right outputs for connection to a power amplifier. Gives +4dB or -10dB Master output level options. 4 27. Effects Return Jacks ENGLISH 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. 28. Effects Level Selection Switch 29. Effects Send Jack 30. Footswitch Socket 31. MIDI OUT 32. MIDI THRU 33. MIDI IN 34. MAINS INPUT When you switch on 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. Fig 1 Patch Patch Data Patch Store Creating Your Sounds 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 ...