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CLASSIC PHASER
MXR Phase 90
$44 on Reverb
MULTI-MODE
Electro-Harmonix Small Stone
$34 on Reverb
ALL MODULATION
Boss PH-3
$2 on Reverb

The phaser pedal produces one of rock's most recognizable sounds — from Eddie Van Halen's 'Eruption' to '70s funk guitar. It splits the signal, phase-shifts part of it, and recombines the two for a swirling, wooshing effect.

This guide covers the best phaser pedals from $60 analog classics to $370 professional modulation processors. All prices are mid-2026 used market values.

The 7 Best Phaser Pedal

#1

MXR Phase 90

4-stage analog phaser · 4 phase-shift stages, single Rate knob, LED indicator, 9V, Script and Block circuit variants$60–$90 used

Best for: The definitive phaser pedal, Eddie Van Halen tone, simple and classic, all-around analog phaser

The MXR Phase 90 is the phaser pedal — Eddie Van Halen used it for 'Eruption' and countless Van Halen recordings. One Rate knob controls the entire effect, making it the simplest and most immediately musical phaser available. The 4-stage all-analog phase shifting circuit produces the classic whoosh that defined 1970s rock guitar. All subsequent phasers are compared against the Phase 90. Used at $60–$90.

What to check used: The Phase 90 has one control — Rate. This is a feature for players who want immediate results, but a limitation for players who want to dial in specific phase character. The current production Block version has a slightly different character than the vintage Script version (softer, more subtle). For the original Phase 90 character, a Script-logo version or the MXR Script Phase 90 reissue is more authentic.

Available now

#2

Electro-Harmonix Small Stone

4-stage analog phaser · Rate knob, Color switch (adds feedback/resonance), analog BBD circuit, true bypass$70–$100 used

Best for: Alternative to Phase 90, EHX phaser character, Color switch for added resonance

The EHX Small Stone is the other classic analog phaser — used by David Gilmour (Pink Floyd), Carlos Santana, and Billy Corgan. The Color switch adds a second position that increases resonance and feedback, producing a more dramatic, swirling phase shift. The Small Stone character is slightly warmer and less aggressive than the Phase 90. Used at $70–$100.

What to check used: The Small Stone's Color switch positions produce meaningfully different sounds — spend time with both positions. In some configurations, the Color-on setting can produce a slightly more prominent volume drop in the sweep. The current nano version is physically smaller than the classic but circuit-equivalent.

Available now

#3

Boss PH-3

Digital multi-mode phaser · 4/8/10/12-stage selectable, Rise/Fall/Step modes, Rate/Depth/Resonance controls, stereo output$80–$120 used

Best for: Versatile phaser with multiple stages and modes, stereo output, programmable Rise/Fall

The Boss PH-3 provides access to 4, 8, 10, and 12-stage phaser in one unit — different stage counts produce noticeably different phase sounds from subtle to extreme. The Rise and Fall modes produce single-direction phase sweeps (just rising or just falling phase, rather than cycling). Step mode produces discrete stepped phase changes rather than smooth sweeps. Used at $80–$120, the PH-3 is the most versatile single phaser pedal available at this price.

What to check used: The PH-3 is digital, which makes it more versatile and controllable but less 'warm' in character than analog phasers (Phase 90, Small Stone). The stereo output requires two amp inputs to hear the stereo spread.

#4

TC Electronic Helix Phaser

Digital phaser with TonePrint · Multiple phaser modes, TonePrint artist presets, Speed/Depth/Feedback controls, stereo I/O$70–$100 used

Best for: TonePrint artist phaser presets, versatile phaser modes, value-for-money digital phaser

The TC Electronic Helix Phaser includes TonePrint technology — downloadable artist preset configurations from professional guitarists. Multiple phaser modes provide flexibility between 4-stage analog-style and more extreme digital phasing. Used at $70–$100, it's the most feature-rich phaser in its price range.

What to check used: TonePrint loading requires a smartphone and app. Like all TC Electronic TonePrint units, the full range of the pedal's capability is only accessible with TonePrint loaded — the stock controls operate a default mode. The TonePrint library requires internet access.

Available now

#5

Earthquaker Devices Grand Orbiter

Analog-voiced phaser/vibrato · Analog-voiced circuit, Rate/Depth/Sweep/Resonance/Mode (phaser/vibrato) controls, stereo output$150–$200 used

Best for: Boutique analog phaser with vibrato mode, comprehensive controls, stereo, professional quality

The EQD Grand Orbiter is a boutique analog-voiced phaser with controls that go beyond simple Rate — Sweep control sets the center frequency of the phase shift, Resonance adds feedback intensity, and a Mode switch selects between Phaser and Vibrato modes. This level of control produces usable tones from gentle shimmer to extreme psychedelic phase shifting to full vibrato. Used at $150–$200.

What to check used: The Grand Orbiter's additional controls require more learning time than the Phase 90 — players who want a grab-and-go single-knob phaser should start with the Phase 90. The Grand Orbiter is for players who have used a basic phaser and want more control.

#6

Strymon Mobius

Premium modulation processor (12 modulation types) · 12 modulation algorithms (chorus, phaser, tremolo, vibrato, flanger, rotary, etc.), MIDI, tap tempo$280–$370 used

Best for: All modulation effects in one premium unit, recording-grade phaser and chorus and tremolo, MIDI

The Strymon Mobius is not just a phaser — it's a comprehensive modulation unit that includes 12 algorithms: Chorus, Flanger, Rotary, Vibe, Phaser, Vibrato, Tremolo, Pattern Tremolo, Autoswell, Ensemble, and Quadrature (vintage 4-phase). If you want premium quality phaser AND premium chorus AND premium tremolo without three separate boutique pedals, the Mobius is the single-unit solution. Used at $280–$370.

What to check used: The Mobius costs significantly more than a standard phaser pedal — the investment is justified only if you use multiple modulation types. For a player who exclusively uses phaser, the Phase 90 at $60 provides adequate quality. The Mobius's advantage is comprehensive modulation coverage at recording-studio quality.

Available now

#7

MXR EVH Phase 90

4-stage analog phaser (Eddie Van Halen signature) · Script mode switch (vintage script circuit), Block mode (modern circuit), EVH graphics$90–$130 used

Best for: Eddie Van Halen signature, Script and Block mode on one pedal, authentic vintage Phase 90 circuit

The MXR EVH Phase 90 is Eddie Van Halen's signature Phase 90 with one important addition: a Script mode switch that activates the original vintage Script Phase 90 circuit (the exact circuit on Eddie's original pedal). Toggling between Script and Block modes allows comparing the vintage and modern Phase 90 circuits directly. For Van Halen fans or players who want the most authentic Phase 90 experience, the EVH version provides both circuits. Used at $90–$130.

What to check used: The EVH graphics are polarizing — the black/yellow stripes are appropriate for Van Halen fans and slightly loud for players who prefer subtle aesthetics. The circuit quality is identical to the Script Phase 90 in Script mode. Verify the Script/Block toggle switch operates correctly on used units.

Available now

Phaser Pedal Buying Checklist

  • Rate sweep range: Turn the Rate control from minimum to maximum while the pedal is engaged. The sweep should produce audible modulation throughout the range — at minimum, very slow phase sweep; at maximum, fast tremolo-like phasing. A rate pot with dead zones indicates a failing potentiometer.
  • Resonance/feedback: If the phaser has a Resonance or Feedback control, test it at maximum — high resonance produces a self-oscillating 'singing' sound. This should be controllable and musically usable at maximum, not uncontrolled oscillation. If the unit has a Script/Block mode switch (MXR EVH), verify both modes operate distinctly.
  • Volume and bypass: Test the phaser engaged vs bypassed at the same amp volume. Some phasers have a slight volume increase when engaged (especially in Script mode) or volume drop. This is normal behavior for certain circuits but should be consistent and predictable.
  • Analog noise floor: Analog phasers (Phase 90, Small Stone) have a moderate noise floor — slightly more than digital pedals. A hiss level that increases significantly when the phaser is engaged indicates a failing op-amp or power supply issue. Some noise increase is normal; significant noise is not.

Frequently Asked Questions

What does a phaser pedal do?

A phaser splits your guitar signal, applies phase shifting to one copy (delaying it slightly at specific frequencies), then recombines it with the original. Where the phase-shifted and original signals are out of phase, they cancel (creating 'notches' in the frequency response); where they are in phase, they reinforce. A slow-moving LFO sweeps these notches up and down the frequency spectrum, creating the characteristic whooshing, swirling sound. Classic examples: 'Eruption' (Van Halen), 'Bullet with Butterfly Wings' intro (Smashing Pumpkins), virtually every '70s funk guitar.

What is the difference between a 4-stage and 8-stage phaser?

Stage count determines how many phase-shift stages are in the circuit, which determines how many notches are in the frequency spectrum. 4-stage (Phase 90, Small Stone): two notches — produces the classic subtle, musical phase sweep. More single-coil and vintage-appropriate. 8-stage (Boss PH-3 at 8-stage): four notches — deeper, more dramatic phase effect. 10 and 12-stage: extreme and dramatic. Most players start with 4-stage (more subtle and musical) and move to 8-stage for more dramatic effect when desired.

Where does a phaser go in the signal chain?

Phaser traditionally goes before distortion/overdrive (for vintage '70s phaser tones where the phased signal drives the distortion) or after distortion in the effects loop (for cleaner, more defined phase sweep). Most common live usage: guitar → phaser → overdrive → amp. In effects loop: amp send → phaser → reverb/delay → amp return. Experiment both ways — the position before or after overdrive produces meaningfully different sounds.

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