Here is a quite rare old japanese low to mid gain overdrive that is supposed to sound really good.
A big thanks to Tobias for the trace!
Saturday 22 January 2022
Guyatone MM2 Metal Master w. mods
Schematic is avaiable HERE.
Some mods needed to be done to make it more versitale. First, the 3 position slider switch is replaced by a rotary switch. Second, High and Mid eq sections were hardwired internally. Since they are pretty much the same as in Boss MT-2 High and Mid eq sections, it was pretty easy to add external pots for these.
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