Recently discovered in the files of Big Muff creator Bob Myer, this lost schematic, more than 50 years old, reveals another attempt to redesign the original transistor Big Muff using op-amps.
Unlike the well-known 1977 Op-Amp Big Muff, this version uses two dual op-amps and has a very different sound. It has a big low end with an almost clean signal underneath the fuzz, plenty of full, rich gain, and more midrange than most Muff circuits. The overall character sits somewhere between fuzz and overdrive while still retaining the fullness of a Big Muff.