MXR MB301 Bass Synth

MXR Bass Synth

Turn your bass into a filthy funk machine with the MXR Bass Synth. It serves up intergalactic grooves and vintage analog-style vibes with a range of monophonic synth tones that call back to hits from Stevie Wonder, Michael Jackson, Parliament Funkadelic, and more.

Designed with low-end professor and tone connoisseur Ian Martin Allison, this powerhouse of a pedal offers thunderous sub-octave, expressive envelope, and lush modulation effects with killer tracking and sustain.

Key Features

• VOICE button: Adds additional oscillators harmonically tuned for more complex tones.
• CUTOFF knob: Sets the 4-pole resonant low-pass filter’s cutoff frequency.
• MIX knob: Sets the mix between dry and synth signals.
• SUB MIX knob: Sets mix between the main synth and sub signals.
• 5 JACKS:
  • Input: Mono
  • Output: TRS jack; allows for stereo output
  • CTR: Expression/tap input or right-channel output
• POWER: Requires 9 VDC, center negative at 330 mA.
• FOOTSWITCH:
  • Engage/bypass effect: Tap the footswitch.
  • Scroll presets: Hold footswitch. Tap to advance through presets. To exit, hold again or wait for timeout.
  • Freeze current note: Hold footswitch and rotate RESONANCE knob to max to configure. To revert, hold and turn RESONANCE to min.
• SHAPE button: Selects oscillator waveform:
  • Triangle: Subtle and smooth
  • Sawtooth: Rich and aggressive
  • Square: Fat, rubbery punch
• ENVELOPE knob: Controls the attack/decay times of the filter envelope. Lower settings give a fast, plucky response, while higher settings create a slow, sweeping effect. When fully counterclockwise, the envelope filter is off.
• MOD knob: Sets the amount of modulation.
• RESONANCE knob: Boosts gain at cutoff frequency, adding a sharper, more expressive effect at higher settings.
• PRESETS button: Selects one of 8 different presets.