Weave compelling, shifting, musical tapestries and slip into Modulation Madness!
With four independent modulation effects sections synced in time, the Electro-Harmonix Mod Rex offers new ways to add dimension to your sounds!
Whether you play guitar, bass, synthesizer, or another electronic instrument, the Mod Rex packs a ton of creative potential.
True stereo operation allows you to craft expansive panning effects.
Dial in polyrhythmic effects with nine different note-lenghts to choose from.
With its extensive tempo control possibilities, the Electro-Harmonix Mod Red Polyrhytmic Modulator is ready to integrate into any rig!

Seven modulations to choose from.
The Mod Rex pedal packs four individual effects sections, each with their own time settings.
The Mod section offers up classic vibrato, flanger, chorus, or phaser effects.
The Trem section provides tremolo, and the Pan section creates stereo panning effects.
The Filter section features a modulated filter with selectable lowpass, highpass, or bandpass operation.

Limitless polyrhythmic possibilities!
Each section on the Mod Rex pedal has its own LFO with four selectable waveforms.
They affect the way the modulation transitions and interact with each other.
Think modulating each section with a different waveshape is exciting? Well that's just the start!
Each section can be set to one of nine different time subdivisions (from whole notes to 16th notes).
This lets you create polyrhythmic modulation effects simply by selecting different time divisions for each section.

Extensive MIDI capabilities.
The pedal’s robust MIDI implementation enables you to sync devices quickly and easily.
You can also automate functions and changes so they occur precisely when and where you want them whether you are working at home, in a studio or live!

Electro-Harmonix Mod Rex Polyrhythmic Modulator Features:
• Modulation pedal for guitar, bass, and synthesizers.
• Up to four simultaneous modulation sections synced in time.
• Vibrato, flanger, chorus, and phaser effects.
• Trem section delivers classic tremolo effects with depth control.
• Pan section creates animated panning effects: even from a mono input source.
• Filter section lets you modulate a filter with selectable lowpass, highpass, and bandpass filter modes.
• 9 tempo subdivision options for each modulation section.
• 4 LFO shape options for each modulation section (rising sawtooth, triangle, falling sawtooth or square wave).
• Save and recall up to 100 presets.
• Full stereo input and output.
• Control tempo via knob, footswitch, external switch, expression pedal or MIDI clock.
• Any parameter can be controlled by MIDI CC messages.
• External expression pedal input.
• External foot controller input makes banking up and down thru presets quick and easy.
• Power supply included.
• Power: 9V DC.
• Current consumption: 100mA.
• Dimensions: 4.75" x 5.75" x 2.5".

Product Specs

Brand New (New)
Mod Rex
Multi-Effect Unit
Made In
United States


About The Seller

Electric Mojo Guitars
Joined Jul 2013
Blainville, Canada


Accepted Payment Methods

Shipping Policy

Ships from Blainville, Canada to:

United States
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Puerto Rico
Hong Kong
Korea, Republic of
New Zealand
Russian Federation
United Kingdom

We’ve sent thousands of packages all around the globe.
Each order is packed with the buyer’s best interest in mind.

Orders placed before 3pm EST ship on the same business day.
Tracking details will be added to the transaction details shortly after purchase.

Estimated Delivery Time:
Canada : UPS Expedited (1 - 3 business days).
USA : UPS Expedited (2 - 3 business days).
International : UPS Express Saver (3 - 5 business days).

Shipping prices don't include import taxes which vary from country to country.
Customers in Canada and the USA will not be charged import fees.
Customers outside of Canada and the USA are responsible for any import fees that may be charged by their government.

Tax Policies

This shop collects taxes in the following regions:

Location Tax Rate
Prince Edward Island, CA 15.0%
Newfoundland and Labrador, CA 15.0%
New Brunswick, CA 15.0%
Nova Scotia, CA 15.0%
Alberta, CA 5.0%
British Columbia, CA 5.0%
Manitoba, CA 5.0%
Northwest Territories, CA 5.0%
Nunavut, CA 5.0%
Ontario, CA 13.0%
Quebec, CA 14.97%
Saskatchewan, CA 5.0%
Yukon Territory, CA 5.0%
Tax is calculated automatically in checkout for the following U.S. states:
District of Columbia*
New Jersey*
South Carolina*
South Dakota*
*State sales tax is required in this region. Learn More

Return Policy

Return Window

This product can be returned within 30 days of receipt.

General Terms

Items must be returned in original, as-shipped condition with all original packaging and no signs of use. Buyer assumes responsibility for all return shipping costs unless the item was not received as described.


Buyer receives a full refund in their original payment method less any shipping costs.

Special Conditions

If you are not satisfied with your purchase, please return it within 30 days of the original purchase date for a refund minus shipping.

Please pack the item carefully in a box and use a shipping method that includes tracking.

Please note that returned items must be received in brand new condition.
Items must be returned in their original packaging with all included material.
If an item is returned in undesirable condition, a 25% restocking fee will be charged.

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Electric Mojo Guitars

Blainville, Canada
Joined: Jul 2013

Seller Achievements

Electro-Harmonix Mod Rex Modulator Pedal
+ Free Shipping