MOD 2 / Marshall (created by Mark Howell)
This mod adds diodes to the gain structure to create a "fuzzier" tone. It should be pointed out that this idea gives a somewhat "sterile" sound to the MP-1, very much like adding a solid-state Overdrive pedal in front of your traditional tube amp. It should be also pointed out that while the schematics for this mod "look good on paper" it may or may not be of any real benefit to most MP-1 users, since this mod makes the gain very "buzzy" and "harsh" and could be reminiscent of the guitar sound usually associated with "industrial" genres of music.
Pros:
Great sound for "industrial" players.
Cons:
Loses the "pureness" qualities of a tube preamp.
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