The MXR MB301 Bass Synth is a feature-rich synthesizer effects pedal designed specifically for bass guitar. It blends thunderous sub-octave tones with expressive envelope filtering, lush modulation, and a suite of intuitive controls that let you explore classic synth bass textures and modern sound design. Inspired by vintage analog synths and crafted in collaboration with low-end expert Ian Martin Allison, this pedal also includes eight onboard presets and selectable waveforms for versatile performance and creative expression. 

• Brand: MXR (Jim Dunlop)
• Model: MB301 Bass Synth Pedal
• Type: Bass synthesizer effects pedal
• Controls: Mix, Sub Mix, Cutoff, Resonance, Envelope, Mod
• Buttons: Voice (additional oscillators), Shape (waveform selection)
• Presets: 8 onboard factory presets
• Waveforms: Triangle, Sawtooth, Square (selectable)
• Outputs: 1/4″ output (mono or TRS stereo capable)
• Expression/Tap input: Yes (via TRS jack, optional external control)
• Power: 9 V DC, 330 mA, center-negative (no battery power)
• Bypass: Buffered bypass (true bypass in select modes)
• Designed for: Bass guitar with synth-like sounds and extended tonal control