New Strymon Zelzah Multidimensional Phaser - IN STOCK - *Free Shipping in the USA*

  • $349.00
    Unit price per 


From Strymon:

Our goal was to capture the rich phasing sounds that were introduced in the 1970s that work so beautifully with electric guitar and electric piano.

In addition to providing the best possible version of the vintage phaser sounds we grew up with, we also wanted to expand the sonic possibilities in a way that was unique and unexpected for a phaser.

To do that, we developed an architecture that contains a modified all-pass filter as the basis for the 6-stage phaser.

A phaser is a filtering effect made up of cascading all-pass filters. There are no delay lines. But with our modified all-pass structure, we are able to expand the time response of the all-pass seamlessly and continuously.

On the four stage side, we wanted to provide the classic sounds you expect from a premium four stage phaser, while adding barber sweep and envelope controlled sweep, and a Depth control that is tuned to deliver great phasing sounds even at very shallow settings.


Zelzah gives you two fully independent, versatile phasers at the touch of a button.

Use one at a time, or use both in one of several possible routing configurations.

With each phaser having a wide range of control over its tonal characteristics, the possibilities are near infinite with Zelzah.


Our team spent months working to perfect each aspect of Zelzah’s sound design, making it so that any combination of settings would yield musically useful tones.

Experiment to your heart’s content knowing that organic, lush modulation awaits at every setting.



Zelzah contains modulation multitudes waiting to be discovered.

Our groundbreaking 6-Stage phaser algorithm can take you from vibey vintage phasing to full-on flanging with the turn of a knob. Go even further and achieve iconic chorus tones, all with just one pedal.

Zelzah’s 4-Stage side is just as versatile, with everything from classic phasing to warbly vibrato available, and even tones that border harmonic tremolo territory.




Zelzah features full stereo in and out capabilities.

It can also receive mono input and still give you stereo output if you’d like to use it as the stereo origin point of your signal path.

When using stereo outs, use the Stereo Spread live edit function to increase the stereo spread between your outputs to create a dimensional stereo image with life and movement.

Being true stereo, Zelzah processes incoming stereo signals independently, with the left input being treated to its own 4-Stage and 6-Stage phasers, and the right input also having its own respective phasers.

Pair that with the ability to also process incoming stereo signals in split mode, where the 4-Stage phaser processes the left input only and the right input is processed by the 6-Stage phaser, and Zelzah just may be the most flexible modulation pedal on your board.



Want even more control over Zelzah? Connect an expression pedal and enjoy a whole new level of instantaneous, continuous control. Set as many knobs as you like for the heel position and toe position of your expression pedal, and all settings will simultaneously morph throughout the full range of the expression pedal.

If you need more presets, connect a MultiSwitch Plus for three presets available at the press of a footswitch.

With full MIDI implementation, you can also control just about every switch, knob, and setting remotely with by sending MIDI commands from your controller or DAW via Zelzah’s EXP/MIDI jack or USB-C connection.