Experience thunderous low end with the Dunlop MXR Sub Octave Bass Fuzz Pedal. Combining the Growl section of the Bass Octave Deluxe with a classic fuzz circuit, this sonic behemoth lets you craft your own recipe of subterranean tones without sacrificing any of your instrument's natural sound. Two switchable voices, tone controls, and a Mid Level control offer even more tonal versatility.