Electro Harmonix Expression Pedal (single)

A Simple and Effective Expression Solution in the Electro-Harmonix Universe

At Electro-Harmonix, foot expression is not a gimmick: it is a direct way to transform a "static" effect into a full-fledged instrument. The EHX Single Expression Pedal follows this logic with a deliberately simple format (single output), enriched with key adjustments to avoid compatibility issues. It targets musicians who want reliable, immediate, and affordable control over their effect parameters without resorting to complex or costly solutions.

For Whom and For What: From Guitarists to Synth Players, in Studio and on Stage

This expression pedal is suitable for both the beginner who wants to finally utilize the EXP input of their pedal and the experienced musician seeking a lightweight and sturdy controller for their pedalboard. In terms of use, it is ideal for real-time control of settings such as delay mix, feedback, modulation speed, vibrato/chorus depth, reverb level, gain, or any assignable parameter depending on the connected device.

In live situations, it enables smooth transitions (gradual swells, "swell" effects, tremolo speed-ups) while keeping your hands on the instrument. In studio, it becomes a recording tool: you capture a more organic, "human" automation compared to mouse adjustments. And if you use keyboards/synths or effects processors with an expression input, the Single Expression Pedal offers a very direct approach: one foot, one parameter, one gesture.

Controls, Settings, and Connectivity: Designed to Adapt to Your Gear

The strength of the EHX Single Expression Pedal lies in its ability to adjust to very different equipment without modification. The TRS polarity switch changes the internal wiring of the TRS jack to improve compatibility with a wide range of EXP inputs. The Reverse button reverses the pedal travel direction: useful when a device reacts "backwards" (for example, heel = max value instead of min). Finally, the Range knob allows you to narrow or widen the control sweep : you can achieve a very fine travel for micro-adjustments or, conversely, a more pronounced variation depending on the controlled parameter.

The connectivity is intentionally minimalist and efficient: a single 6.35mm TRS Jack output (TRS cable included). Note: this is not an audio effect pedal, so there is no true bypass or guitar signal path through the pedal. Its role is to transmit a control signal to the device, which then processes the sound.

Sound Characteristics

An expression pedal does not "sound" in the traditional sense: it does not color your signal or add gain, modulation, or distortion. However, it directly influences the musicality of your effects by giving you access to nuances impossible with a simple potentiometer. The Single Expression Pedal stands out with a musician-oriented approach: a usable travel range adjustable via Range, and adaptable behavior through Reverse and the TRS polarity. The result: you spend less time fighting an unsuitable control curve and more time playing "into" the effect, expressively and naturally.

Technical specifications

Effects	Volume / Expression	Use	electric guitar
Technology	Analog	Color	Black
Format	Pedal

Category	expression pedal (control via EXP input)	TRS polarity switch	improves compatibility with different devices
Circuit	analog	Output	6.35mm TRS Jack (expression)
Audio	mono	Chassis	advanced polymer (lightweight and roadworthy design)
Design	single output	Dimensions	9.92 x 3.4 x 3.0 inches
Operation	passive, no power required	Power supply	not required
Range knob	adjusts the sweep range to fine-tune response	Required voltage	0 V
Reverse button	reverses the pedal travel direction	Current consumption	0 mA