MXR MB301 Bass Synth – Funk from Another Galaxy

The MXR MB301 Bass Synth is your ticket to turning the groove dial to interstellar. Co-designed with tone wizard and low-end legend Ian Martin Allison, this pedal transforms your bass into a monophonic synth beast, summoning the cosmic funk energy of icons like Stevie Wonder, Michael Jackson, and Parliament Funkadelic—without needing to lug a vintage synth rig to your next gig.

At its core, the MB301 delivers classic analog-style synth tones with a modern edge. From deep, thunderous sub-octaves to dynamic envelope sweeps and lush, swirly modulation, every note you play becomes a bold, expressive statement. Whether you’re dropping seismic synth-bass in a neo-soul track, laying down greasy funk lines, or weaving textures into an electronic mix, the MB301 keeps your playing responsive and your tone huge.

What truly sets it apart is its incredible tracking and sustain. Fast runs, slow glides, staccato stabs—it’s all there, with synth articulation that feels like an extension of your fingers. And with MXR’s rock-solid construction and intuitive layout, dialing in your favorite tones is quick and fun.

• Classic Analog-Style Synth: Gritty, smooth, and undeniably funky—like plugging your bass straight into a Minimoog.

• Sub-Octave Power: Add massive low-end reinforcement with room-rattling sub tones.

• Envelope Expressiveness: Shape your attack and filter response to create vocal-like dynamics and wah-style sweeps.

• Modulation Magic: Bring shimmer, wobble, or movement to your sound with modulation that adds dimension and space.

Whether you’re laying down a foundation for R&B, exploring modern indie pop textures, or just trying to recreate that Stevie Wonder bass line from “I Wish,” the MB301 delivers synth tone with feel, finesse, and ferocity.

• Input Impedance: 1 MΩ

• Output Impedance: 100 Ω

• Maximum Input Level: +5 dBV

• Noise Floor: -97 dBV

• Current Draw: 330 mA

• Power Requirements: 9V DC (center-negative only) – no battery operation

• Recommended Power Supplies: Dunlop ECB003 adapter, MXR Iso-Brick™, Iso-Brick™ Mini, or Iso-Brick™ Pro

• True bypass switching

• Monophonic synth voice engine with rich analog-style tones

• Designed in collaboration with Ian Martin Allison

• Enclosure: Compact, rugged MXR housing built for serious stage use