

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.
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.
The Long Story
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.
FUNK IT UP
Dig into your groove with a full, player-friendly suite of controls to shape every detail of your bass synth tone. The Sub Mix knob sets how much of the sub octave is blended with the main synth signal so that you can go as fat and low as you want. The Mod knob brings shimmering liquid tones, from subtle, musical motion to bold, mind-bending pulses—while the Envelope knob sets the filter response from rubber band bounce to slow, syrupy sweeps. Mix, Cutoff, and Resonance knobs help you dial in the perfect tone and feel for your setup—blend dry and wet signals, set filter cutoff frequency, and boost that frequency for extra punch.
Finally, the Voice button adds additional harmonically tuned oscillators for more complex tones while the Shape button selects your preferred waveform: smooth and subtle triangle, rich and aggressive sawtooth, or fat and punchy square.
PRE-FUNK
If you want to skip the set up and get right down to it, then we have eight different presets designed by Ian Martin Allison to plug you straight into the groove. Each is inspired by classic synth tones, from those heard on Michael Jackson’s “Thriller” and Herbie Hancock’s “Chameleon” to Peter Gabriel’s “Sledgehammer” and Nine Inch Nails’ “Head Like a Hole.” Cycling through them is as simple as pressing the Preset button.
DIG DEEPER
For the true bottomologists out there, the MXR Bass Synth features a number of additional parameters, from oscillator and modulation mix to compression and tracking style. You can also run the pedal in stereo output mode, use an off-board switch such as the MXR Split + Tap or Tap Tempo Switch to cycle presets, use a Volume(X)™ Series Pedal to blend setting configurations, and more.
GO FORTH AND GET NASTY
Whether you’re replicating pop hits in a cover band, holding down the low end at church, or touring the world, this pedal gives you instant synth bass magic. Get down on the one with the MXR Bass Synth.
1 – All claims require a purchase receipt. It is the customer's responsibility to present it when making a claim.
2 – Except as stated below, in-store sales are final and items purchased may not be returned. By completing their transaction, the customer acknowledges that they have taken the item(s) in optimal condition.
3 – Guitars, basses, pedals, amplifiers, accessories, and tubes are not returnable. By paying for the item, the customer acknowledges that: (i) they inspected it and found it to be in optimal aesthetic condition without defects; and (ii) they tested it and it was functioning properly.
4 – All claims due to defects are subject to the manufacturer’s terms and conditions.
5 – Guitars, basses, pedals, and amplifiers will have a 30-day warranty. The electronics of guitars and basses will have a 90-day warranty. Guitars Boutique, at its sole discretion, will decide whether to repair, replace parts or components (with identical ones), and/or replace the item with an identical one.
6 – At the store's discretion, defective items may be exchanged for an identical item SUBJECT to the defective item being in the same condition as when it was acquired, including its original packaging with all its accessories. This will be done as store credit only. The credit does not apply to special orders or lay-away.
7 – All merchandise leaving the store will be considered as used in the future.
8 – No refunds will be given, regardless of the person.
9 – Special, clearance, or discounted items are not returnable.
Puerto Rico only.
In case of a return, the shipping cost will be deducted from the refund.
Guitars Boutique ships to PR via federal mail USPS, UVA, and iWide.
Estimated delivery time once the order has been shipped:
- Lightweight items, less than 14 pounds are shipped via USPS.
- Heavier items are shipped via iWide and UVA.
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- The buyer is responsible for the care of their instrument/equipment against changes in temperature, humidity, and unstable current.
All guitars, basses, pedals, and amplifiers will have a 30-day warranty. - The electronics of guitars and basses will have an extended warranty of 90 days.
- Suppliers, who generally reserve the right to decide whether to repair, replace parts or components (with identical ones), and/or substitute the item with an identical one, at their sole discretion.
- Exchanges, if warranted (at the store's discretion) and if the product is in optimal condition (including its packaging), are for store credit only.
- Credits do not apply to special orders or lay-away.