MXR's MB301 is a compact bass synth pedal that delivers rich, analogue-style synth tones without the hassle of a keyboard rig. Co-developed with Ian Allison, it captures everything from '70s funk squelch to gritty industrial leads. With eight onboard presets, powerful filter and modulation controls, and deep editing under the hood, it’s equally suited to quick jams or full-on sound design. Tracking is fast and stable—even on 5-string basses—and the layout is clean, pedalboard-ready, and built like a tank. Features & Specs 8 user-adjustable synth presets Mix, Sub Mix, Cutoff, Resonance, Envelope, and Mod controls Switchable oscillator waveforms: triangle, sawtooth, square Secondary voice stacking with pitch detune Preset footswitch with scrolling and freeze function Expression input for filter, mod or preset control TRS stereo output, wet/dry routing 9V DC power (330mA draw, no battery support) 1MΩ input impedance 100Ω output impedance –97dBV noise floor Requires a 9-volt (330 mA) centre negative power supply. Video: https://youtu.be/WWm-AukbEpEProduct Specs Item Number: 38625 Make: MXR Model: MB301 Bass Synth Condition: Brand New Finish: Grey Categories: effects-and-pedals ⇒ guitar-synths ⇒ pedal Function: Bass Chorus Dynamics Digital Dual/Stereo Filter Pitch Shifter Synth Voice Made In: United States MPN: MB301 UPC: 710137141643 Modular Grid: Pedals ⓘ ＋ Dimensions*: 64 mm wide 110 mm high Power*: ? mA / ? V AC/DC * User contributed details
