Electro-Harmonix - Bass Big Muff PI Distortion/Sustainer
Reviews coming soon
About this product
The EHX Bass Big Muff lets you rip and rumble with a full fuzz tone and no low-end loss. Inspired by the mythical bass response of the Black Russian Big Muffs of the 90's, the distortion of the Bass Big Muff hits like a ton of bricks, sludgy mortor and all. The classic three-knob design of Volume, Tone, and Sustain make for familiar control over the fuzz circuit. A Dry/Bass Boost switch either mixes your dry signal with the fuzz tone or reintroduces more low frequencies into the fuzz circuit, which is useful when the Tone knob is set high. A separate Dry output allows for two amps sets for increased setup versatility. Features: · Tailor your drive/distortion sound with sustain, tone and volume knobs · A dry switch that mixes your dry bass with the Bass Big Muff PI's distortion · A bass boost EQ switch that reintroduces your low frequencies when tone is set for high frequencies · Based on the Russian Big Muff · True bypass · Tough and compact die-cast chassis · 9V battery included
Legendary Sound Innovation
Electro-Harmonix (EHX) is a pioneering music brand celebrated for its groundbreaking guitar and bass effects pedals that have shaped the sound of modern music for decades. Known for their creativity, durability, and unmistakable tone, EHX pedals—like the Big Muff, Memory Man, and POG—are trusted by musicians worldwide for delivering bold, expressive sound across every genre.
- BrandElectro-HarmonixModel NumberBASS BMProduct NameBass Big Muff PI Distortion/SustainerProduct Width5.5 inchesProduct Height3.25 inchesProduct Length6.5 inches
Reviews
This product doesn't have any reviews yet.
Compare similar products

The EHX Bass Big Muff lets you rip and rumble with a full fuzz tone and no low-end loss. Inspired by the mythical bass response of the Black Russian Big Muffs of the 90's, the distortion of the Bass Big Muff hits like a ton of bricks, sludgy mortor and all. The classic three-knob design of Volume, Tone, and Sustain make for familiar control over the fuzz circuit. A Dry/Bass Boost switch either mixes your dry signal with the fuzz tone or reintroduces more low frequencies into the fuzz circuit, which is useful when the Tone knob is set high. A separate Dry output allows for two amps sets for increased setup versatility. Features: · Tailor your drive/distortion sound with sustain, tone and volume knobs · A dry switch that mixes your dry bass with the Bass Big Muff PI's distortion · A bass boost EQ switch that reintroduces your low frequencies when tone is set for high frequencies · Based on the Russian Big Muff · True bypass · Tough and compact die-cast chassis · 9V battery included

Vintage-inspired fuzz pedal with FAT mode, bias control for sag effects, and tone tilt for sound shaping.

Electro-Harmonix Battalion Bass Preamp & DI Pedal. Flexible bass preamp and DI delivers powerful tone-shaping capabilities in a rugged pedalboard-friendly package! The EHX Battalion Bass Preamp and DI features a four-band equalizer, fully-featured MOSFET distortion section with three signal path options, a compressor, a noise gate, and comprehensive I/O, making it an all-in-one tone tank for bass guitar. Product Highlights: Four-band EQ tailored for bass with Bass (below 200Hz), Lo Mid (280Hz), Hi Mid (750Hz), and Treble (above 2kHz). Distortion section with Level, Blend, Drive, and Tone controls plus footswitch. Three signal flow modes—Pre EQ, Post EQ, and Dry EQ—for tonal flexibility. Compressor with pushbutton, amount control, and LED for added thump and sustain. Noise Gate with adjustable threshold to eliminate hum while preserving attack and tone. Flexible I/O with switchable 10dB pad for active basses, XLR balanced output with ground lift, and separate dry output. Product Features: Gate Knob: Sets noise gate threshold. VOL Knob: Master output level. Bass/LO MID/HI MID/Treble Knobs: EQ controls. Compressor Knob & Button: Adjust and engage compression. Level Knob: Distortion output level. Blend Knob: Mix dry and distorted signals. Drive Knob: Distortion intensity. Tone Knob: High-frequency cut for distortion. Distortion Pre/Post/Dry EQ Switch: Sets distortion position in signal chain. -10dB Pad Button: Reduces input for high-output basses. Ground Lift Button: Disconnects XLR ground if needed. XLR Bypass Button: Sets XLR output to follow bypass state. XLR VOL Knob & XLR Jack: Balanced DI output level and connection. Output Jack: Main 1/4" output. Dry Output Jack: Unaffected signal output. Input Jack: Instrument input. Drive Footswitch & LED: Toggles distortion. Bypass Footswitch & LED: Toggles overall effect. Product Specifications: Circuit: Analog. Bypass: Buffered Bypass. Audio: Mono. Power Supply: 9.6VDC-200mA power adapter included. Dimensions (in): 5.75 x 4.75 x 2.5. Current Draw: 100mA. Year Released: 2017. UPC: 683274011943.

Electro-Harmonix Deluxe Bass Big Muff Pi Fuzz / Distortion / Sustainer Pedal. Thunderous bass fuzz with crossover control and expanded I/O in the most versatile Bass Big Muff ever! The EHX Deluxe Bass Big Muff is the flagship of EHX bass fuzz and delivers enhancements to the classic Bass Big Muff Pi that are specifically tailored to the needs of the modern bass player. The sturdy foundation of the Deluxe Bass Big Muff is the thunderous tone inspired by the classic Black Russian Big Muff of the ’90s. Added to that is a Blend knob to mix back in your original tone and add definition to your low end. A Gate quiets unwanted hiss for a smooth performance. The ultimate tone-sculptor of the pedal is the Crossover section. Here the Fuzz and Dry signals are separated and run through a High Pass Filter and Low Pass Filter respectively. This creates a tone with fiery top end and a huge, thumping bottom. This is the most versatile Bass Big Muff ever! Product Highlights: Pad on the input that’s switchable between 0dB and -10dB ensures the pedal is optimized for use with both passive and active pickups. Blend allows a player to mix to taste the direct and distorted signals. Three outputs: a 1/4" effect out, 1/4" direct (buffered dry) out and XLR DI out give complete control of your output signal and sound. Foot-switchable crossover section with a variable low pass filter on the dry signal and a variable high pass filter on the distorted signal give bassists the ability to sculpt their sound. Crossover circuit, in conjunction with the Blend control, lets you keep the low-end clear and focused and the high-end bright and cutting. Built-in noise gate with an adjust threshold eliminates unwanted noise at any level. Tough and compact die-cast chassis. 9V battery included. Product Features: Volume: Works as a master volume for the entire pedal. Blend: This mixes between the dry and distorted signals. Tone: Provides a range of sounds from high treble to deep bass on the distorted effect only. Sustain: Adjusts the amount of sustain and distortion. Gate: Controls the input amplitude needed to open the noise gate. HPF: When CROSSOVER is engaged the signal just prior to entering the distortion circuit is sent through a second-order high pass filter. LPF: When CROSSOVER is engaged the dry signal is sent through a second-order low pass filter. Input: This toggle switch engages 10dB of attenuation on the input to make the Deluxe Bass Big Muff friendlier to basses with active pickups. DI Output: Low impedance output so that you can plug directly into a mixing console and recording equipment. Direct Out: This is a buffered output of the original bass signal. You can connect this jack to an amplifier or different effects chain. Output: This is the main output of the Deluxe Bass Big Muff Pi. Connect it to the input of your amp or another effects pedal. Input: Musical instrument input. Plug your instrument into here. Crossover Footswitch: Turns the crossover circuit on and off. When the green status LED is lit, the crossover circuit is active and the HPF and LPF knobs can be used to produce a multitude of different tones. Bypass Footswitch: Toggles between effect mode and a high quality buffered bypass. When the red status LED is lit, the effect is active. Product Specifications: Circuit: Analog. Bypass: Buffered Bypass. Audio: Mono. Power Supply: 9V battery included (optional 9.6VDC-200mA power adapter not included). Dimensions (in): 5.75 x 4.75 x 2.5. Current Draw: 15mA. Year Released: 2012. UPC: 683274011318.
Specs
Be the first to ask a question.
We’ll try to get your question answered within 24 hours by a Best Buy customer or brand representative.














































