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Professor’s Notes
Big Muff energy with bass player priorities. The Deluxe gives you the chaos and the control — fuzz that can snarl, sing, or sit right where it belongs in the mix. Professor’s Tip: Use the crossover to dial in a vintage top grind over clean bottom thunder.

Description
The Electro-Harmonix Deluxe Bass Big Muff Pi expands the iconic Bass Big Muff with features tailored to the modern bassist. It delivers thick, sustaining fuzz and distortion while preserving your low end and definition — finally, a Muff that knows its role in the rhythm section.

The Blend control mixes dry and fuzzed signals for clarity and body, while the Crossover section lets you sculpt highs and lows independently with High-Pass and Low-Pass filters. The Noise Gate tightens the signal under heavy fuzz, and an Input Pad switch optimizes the pedal for both passive and active pickups.

With multiple output options, including a dedicated dry out and balanced XLR DI, the Deluxe Bass Big Muff Pi is equally at home on stage or in the studio — from gritty overdrive to full fuzz annihilation.

Specifications
Type: Analog fuzz/distortion/sustainer pedal
Controls: Volume, Blend, Tone, Sustain, Gate, HPF (High-Pass) and LPF (Low-Pass)
Switches: Input Pad (0 dB / -10 dB), Crossover footswitch, True Bypass footswitch
Outputs: ¼″ Effect Out, ¼″ Dry Out, XLR DI Out
Power: 9V battery included or optional 9VDC adapter (not included)
Current Draw: ~22 mA
Enclosure: Die-cast aluminum
Dimensions: 6.75" x 5.25" x 2.75"

What’s Included
Electro-Harmonix Deluxe Bass Big Muff Pi pedal
9V battery (installed)
Original packaging and documentation