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Electro-Harmonix Mod Rex Polyrhythmic Modulator Pedal , $169.00 - Add to Cart Skip to Product Information

Electro-Harmonix Mod Rex Polyrhythmic Modulator Pedal

Modulation Effects Pedal for Guitar, Bass, and Synthesizers, with Tap Tempo and MIDI
Item ID: MODREX
Electro-Harmonix Mod Rex Polyrhythmic Modulator Pedal
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Electro-Harmonix Mod Rex Polyrhythmic Modulator Pedal
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Time-synced Modulation Madness

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With four independent modulation effects sections synced in time, the Electro-Harmonix Mod Rex Polyrhythmic Modulator pedal offers new ways to add dimension and motion to your sounds. Whether you play electric guitar, bass, synthesizer, or another electronic instrument, Mod Rex packs a ton of creative potential. True stereo operation allows you to craft expansive panning effects. Nine different note-length choices allow you to dial in polyrhythmic effects. And with the ability to control its tempo via the Tempo knob, the Tap tempo footswitch, the expression input, or via MIDI clock, the Electro-Harmonix Mod Rex Polyrhythmic Modulator pedal is ready to integrate into any music production environment.

Seven vibrant effects in total

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.

Create complex modulation effects with polyrhythmic LFOs

Each section on the Mod Rex pedal has its own LFO with four selectable waveforms. Modulating different sections with different waveshapes can reward you with exciting sonic textures, and that's just the start. Because each section can be set to one of nine different time subdivisions (from whole notes to 16th notes), you can create polyrhythmic modulation effects simply by selecting different time divisions for each section.

Extensive MIDI capabilities

One reason synthsists at Sweetwater like the Mod Rex Polyrhythmic Modulator pedal is its comprehensive MIDI support. Every parameter on the Mod Rex can be controlled via CC messages, making it a great output effects processor for your DAW setup or live electronic performance rig.

Electro-Harmonix Mod Rex Features:

  • Modulation effects pedal for guitar, bass, and synthesizers
  • Full stereo input and output
  • Mod section features 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 allows you to modulate a filter with selectable lowpass, highpass, and bandpass filter modes
  • Each section can be individually modulated by its own LFO, with 4 LFO waveshapes to choose from
  • 9 different selectable time divisions for each section
  • Save and recall up to 100 presets
  • Control tempo via knob, footswitch, external switch or expression pedal, or MIDI clock
  • Comprehensive MIDI implementation — any parameter can be controlled by MIDI CC messages

Warranty Info

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Offer applies only to single-receipt qualifying purchases. Select manufacturers may require that only the manufacturer’s products qualify towards the minimum purchase amount needed to be eligible for promotional financing. Otherwise, an invoice that meets the minimum purchase amount and contains at least one qualifying manufacturer product is eligible for promotional financing. No interest will be charged on promo purchase balance, and equal monthly payments are required on promo purchase until it is paid in full. The payments equal the amount financed divided by the number of months in the promo period, rounded up to the next whole dollar. These payments may be higher than the payments that would be required if this purchase was a non-promo purchase. During the last month(s) of the promo period the required monthly payment may be reduced due to the prior months’ rounding. Regular account terms apply to non-promo purchases. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

Offer applies only to single-receipt qualifying purchases. No interest will be charged on the promo balance if you pay it off, in full, within the promo period. If you do not, interest will be charged on the promo balance from the purchase date. The required minimum monthly payments may or may not pay off the promo balance before the end of the promo period, depending on purchase amount, promo length and payment allocation. Regular account terms apply to non-promo purchases and, after promo period ends, to the promo balance. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

The estimated required monthly payment shown which excludes taxes and delivery equals the amount financed divided by the number of months in the promo period, rounded up to the next cent. During the last month(s) of the promo period the required monthly payment may be reduced due to this rounding. These payments apply only with the financing offer shown. If you make these payments by the due date each month, you should pay off this amount financed within the promo period, if it is the only balance you are paying off. If you have other balances on your account, this payment will be added to any other minimum monthly payments.

Applies only to select items from this manufacturer. Ask your Sweetwater Sales Engineer for more details.