Guitar overdrive pedal effect Dirty Little Secret MKIII from Catalinbread. It is characterized by its dynamism and versatility. This new version offers 2 different voicings: Super Lead (from Plexi to JCM800) and Super Bass (from JTM45 to JTM50/100), selectable via an internal switch. It has five potentiometers to control treble, middle, bass, master and pre-amp functions.