1972 Marshall JMP Model 1986 50-Watt Head

This 1972 Marshall JMP Model 1986 50-Watt head sounds super rich and powerful delivering that classic mid punch that only these circuits can deliver.   This head was modified at some point to the 1987 "Lead" circuit, using as many of the original components as possible.  Several caps have been changed out for the corresponding components in the 1987 circuit, and a "Lead" tag was affixed to the back of the chassis, presumably by whoever did the modification.  This is a killer vintage Marshall head! Includes slip cover.