the rangemaster was introduced in 1965, this circuit quickly found its way onto countless records and contemporarily became a staple sound for many guitarists. famous users of the rangemaster include Tony Iommi (Black Sabbath), Eric Clapton, Rory Gallagher, Brian May (Queen), Marc Bolan (T Rex), Ritchie Blackmore (Deep Purple), and many more. to this day the rangemaster is celebrated for its treble frequency boost, distortion/fuzz characteristics, and the rich overtones that can be achieved when using this effect, especially at high volume.

at the heart of the yesterday effects rangemaster is a vintage nos soviet germanium transistor which has been biased to match spec on original rangemaster units. yesterday's rangemaster includes a 3-way toggle switch that allows the user to switch between the famous original circuit and two additional points of EQ (low and mid).