by Jef | Approximate reading time: 2 Minutes
Electro Harmonix Mod Rex

Electro Harmonix Mod Rex  ·  Source: Electro Harmonix


Electro-Harmonix or EHX is always good for a surprise. Apart from the reissues of classics in the newer mini pedal format, like their recent Big Muff reissue, the company still has new product designs to offer the FX world. Mod Rex is a melange of four different effects, with all sorts of extras. Yet it seems easy enough to use without needing the manual.


Mod Rex

Whether this effects pedal is the king of all modulation pedals, I can not say for sure. But it offers all sorts of potential, which is enough to make it a candidate. The Electro Harmonix Mod Rex is divided into four sections, all of which can only be engaged at the same time: Mod, Trem, Pan and Filter.

Each section has an encoder that sets the division at the set tempo. The four numbers in the display clearly show the four values. In addition, each effect has a dedicated Depth control. Mod and Filter each get their own feedback or resonance controls and a filter type selector switch.

Electro Harmonix Mod Rex

Electro Harmonix Mod Rex

Modulation Station

The Mod section has controls for a standard set of modulation effects: vibrato, flanger, chorus and phaser. It can also invert the right side in phase, thus creating a stereo effect from a mono signal. In the Filter section, the right side can also be inverted and the filter type can be set to lowpass, highpass or bandpass.

100 Presets?

The LFO has the following modes: Ramp up, triangle, ramp down and rectangle. Each can be adjusted individually. The tempo is the same for all four modules. You can enter a tempo over the footswitch, finely adjusted on the top right of the controller, via an expression pedal or via MIDI.

With 100 user preset slots, there is lots of scope for storing your own favourite settings, which is great for sound tweakers. In addition, there is an external footswitch control as well, which will be very handy for going up and down that bank of 100 presets!

The pedal has a stereo input and output, too, letting you run everything in stereo if you so choose. It also makes it eminently usable in the studio, too.

RRP – USD 249 


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  • Electro Harmonix Mod Rex: Electro Harmonix
Electro Harmonix Mod Rex

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