IE: When you adjust the "Level" control you are simultaneously adjusting (2) control pots. Explanation - The "Level" control on the front panel of the JMP-1 controls how much output is sent to the Output Jacks. This control is what is known as a "Dual Ganged" control pot.Stereo Output Question - I have a stereo power amp that I am using with the JMP-1 to drive (2) speaker cabinets. One output jack of the JMP-1 is going to the left side of the power amp and the other output goes to the right side. Both Level controls on the power amp are full up / on "10" but one speaker cabinet is louder than the other. Note - for best results all instrument and speaker cables should be high quality.For the best results we recommend the following Go out of your JMP-1 Main Output -> Into your effects -> Into your power amp. In our honest opinion The effect loop on the Marshall JMP-1 is less than ideal.Is this possible, and if so are there any negatives to doing this? How much would the mod cost? The settings numbers are 92 - 99įX Loop QuestionI’m interested in changing the FX-Loop on my Marshall JMP-1 from parallel to series. Yes we program (8) new patches for you free-of-charge.New Patch Question Do you program any new program patches? If so, where are they stored? Note - For all other settings please refer to Marshall JMP-1 User Manual.Clean 2 - Engaging "Clean 2" will give you a Mid Boost with added breakup.Clean 1 - Only engage "Clean 1" and set to 12.Clean Patches - For maximum clean headroom and improved clean tones we recommend setting the "Volume" to 20 and keeping the front "Level" control set lower.Setting OD1 & OD2 to 20 will give you maximum gain. Gain Patches - In order to keep noise to a minimum the "Volume" should not exceed 12.You must also adjust the internal volumes on each patch/channel.The setting varies depending on the wattage of your power amp. This should be set to approximately 9:00 to 10:00 for stage volume. Preamp - We recommend using the "Level" control on the front panel as the over all System Master Volume.Power Amp - We recommend setting the volume controls wide open / full up.QuestionWhat do you recommend running the levels at in order to keep noise to a minimum? Our business model is not set up to support this. QuestionDo you sell parts to the pubic? Answer: No we do not.
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