Pre-Order Deposit MXR MB301 Bass Synth

Designed with low-end professor and tone connoisseur Ian Martin Allison, the MXR Bass Synth is a powerhouse of a pedal offers thunderous sub-octave, expressive envelope, and lush modulation effects with killer tracking and sustain—plus all the features you need to shape every detail of your tone.

Key Features:

• Sub Mix, Mod & Envelope Controls: Shape your tone from smooth sweeps to bold pulses.

• Voice & Shape Buttons: Add harmonics and choose triangle, sawtooth, or square waveforms.

• Mix, Cutoff & Resonance: Dial in the perfect filter and dry/wet blend.

• 8 Classic Presets: Instantly access tones inspired by hits like Thriller and Chameleon.

• Advanced Options: Stereo mode, preset cycling, external control, and more.

From church gigs to big stages, the MXR Bass Synth delivers vintage vibes and futuristic funk.

This pedal requires a 9-volt (330 mA) center-negative power supply and can be powered by the Dunlop ECB003 9-volt adapter or the MXR Iso-Brick, the Iso-Brick Pro, and the Iso-Brick Mini Power Supplies. This pedal cannot be powered by a battery.

 Controls:

• VOICE ButtonAdds harmonically tuned oscillators for more complex tones

• CUTOFF KnobSets the 4-pole resonant low-pass filter’s cutoff frequency

• MIX KnobSets the mix between dry and synth signals

• SUB MIX KnobBlends between the main synth signal and sub-octave

• JACKS
  Input: Mono
  Output: TRS jack for stereo output
  CTR: Expression/tap input or right-channel output

• Power: 9VDC center-negative, 330mA

• FOOTSWITCH
  Tap: Engage/bypass effect
  Hold: Scroll through presets (tap to cycle, hold again or wait to exit)
  Freeze NoteHold footswitch + turn RESONANCE knob fully clockwise to activate Hold footswitch to freeze the current synth noteTo disable, hold footswitch + turn RESONANCE fully counterclockwise

• SHAPE Button – Selects oscillator waveform: 
  Triangle: Subtle and smooth 
  Sawtooth: Rich and aggressive
  Square: Fat, rubbery punch

• ENVELOPE KnobControls filter envelope attack/decay
  Fully counterclockwise = envelope off

  Lower = fast, plucky response
  Higher = slow, sweeping effect

   

• MOD KnobSets modulation depth

• RESONANCE KnobBoosts gain at the cutoff frequency for sharper, more expressive tone

• PRESETS ButtonSelects from 8 built-in presets