Speculation surrounding this unidentified chugging object has been ongoing since 2017 when it was spotted in Metallica’s studio Read More
“Theory C: it’s a scoop knob… they built James’ parametric EQ into the amp”: Metallica spark a Mesa/Boogie mystery as unidentified amp spotted in 50th Anniversary message to ESP Guitars. Could this be a James Hetfield signature? … from Guitarworld
