Cusack Music Project 34 Pre/DriveThe Project 34 just happens to be the atomic number of selenium, and at the heart of this pedal is a selenium rectifier. Selenium rectifiers are an old technology that goes back to pre germanium times, and were first introduced in the early 1930's. They were last used in the guitar world as rectifiers in older amps such as the 1950's tweeds. Later on in the 1960's they were phased out as the industry turned to modern solid state silicon instead of