Description
Some fuzz pedals just add grit. The MXR Sub Octave Bass Fuzz adds mass. Built around the Growl circuit lifted straight from MXR’s Bass Octave Deluxe and paired with a punishing fuzz stage, this pedal is engineered specifically for players who need their low end to hit like a wall rather than a whisper.
The core of its power lies in the three-way blend: dry, fuzz, and octave signals can each be dialed in independently, so you’re never forced into an all-or-nothing fuzz tone. Want your low B to stay articulate under a thin layer of grit? Blend in more dry signal. Need a sub-octave layer that rattles the room without turning to mud? Bring the octave up and back off the fuzz. This kind of control is rare in a bass fuzz, and it’s what separates the Sub Octave Bass Fuzz from pedals that just slap distortion over your signal.
Once you’ve got your blend, the onboard 3-band EQ lets you shape the result with real precision — tighten things up for a punchy, defined attack, or push everything toward dominating, wall-shaking territory. It’s flexible enough to sit as your primary dirt pedal on the board, whether you’re chasing vintage growl, modern sludge, or something entirely your own.
- Blends dry, fuzz, and sub-octave signals independently
- Growl circuit derived from MXR’s Bass Octave Deluxe
- 3-band EQ for detailed tone shaping
- Designed specifically for bass — built to stay tight even at extreme low end
If your board is missing a dirt pedal that can go from subtle grind to full-on low-end assault, the MXR Sub Octave Bass Fuzz deserves the spot.









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