PhaserA phaser effect is created when a signal from the guitar being fed into the pedal get’s split into two different signals. One returns untouched, but the other is processed by an all-passed filter that changes the length of the signal.  Like this, the sound of the guitar starts to come back as the shifted signal falls back into phase with its untouched signal.

A phaser pedal will have one knob that controls the second signal length commonly labelled Rate or Speed.  Turning it makes the two signal move farther out of phase.  Some phaser pedals have a second knob which can control the Depth.  Depth controls how deep the peaks and valleys of the signal will be stretched.

Simpler Definition:  A space-age sound with lasers!


Video Explanations:

Video: Effects 101: Phaser

Video: Phasers: Do I Need One?

Video: That Pedal Show – Modulation Basics: Chorus, Phaser, Flanger, Vibrato, Tremolo & Vibe


Effect Pedal Examples:

EarthQuaker Devices Grand Orbiter V3 Phaser Pedal

JAM Pedals Ripple Phaser Pedal

Maestro PS-1 Phase Shifter Pedal

MXR M101 Phase 90 Phaser Pedal


Common Internal Components:

MXR Phase 90 PCB Board using 6 single 741 op-amps by National or TI (like the current MXR CSP-026 ’74 Handwired version)

A 2N5952 n-channel FET transistor can be used as a Voltage Controlled Resistor where the resistance value between the Drain and Source terminals (rDS) is controlled by the Gate voltage. The 2N5485 part is also a compatible replacement.


Written Articles:

Article: What Is a Phaser Effect?


Fifty Favorite Effect Pedals for Sale:

Categories: Effect Types