Boss PH-3 Phase Shifter Settings Guide
The Boss PH-3 Phase Shifter expands on the classic PH-1 and PH-2 with multiple stage settings (4, 8, 10, 12 stage phase shift), Rate and Depth controls, a Resonance parameter, and additional modes including Rise, Fall, and Step for non-standard phase effects. It is the most versatile Boss phaser and covers everything from subtle vintage phase to dramatic multi-stage phase sweeps.
The best Boss PH-3 Phase Shifter settings start with: Rate at 4/10, Depth at 5/10, Resonance at 5/10, Stage at 5/10. Adjust from there based on your amp, guitar, and room volume. For Classic Rock: Rate 3/10, Depth 5/10, Resonance 5/10, Stage 3/10.
⚡ Start Here — Recommended Settings
| Control | Starting Position | Range |
|---|---|---|
| Rate | 4/10 | Slow → Fast |
| Depth | 5/10 | Mild → Deep |
| Resonance | 5/10 | None → High |
| Stage | 5/10 | 4-Stage → 12-Stage |
These are universal starting points. Adjust based on your amp, guitar, and room. Scroll down for genre-specific settings and artist-documented positions.
What Each Control Does
Recommended Starting Settings
Safe starting positions for any style. Adjust from here based on your amp and room.
All values on a 0–10 scale. These are starting points — fine-tune by ear.
Settings by Genre
4-stage phase at slow Rate — the classic Van Halen / Eruption phaser setting. The PH-3 in 4-stage mode at Rate 3 approximates the MXR Phase 90 character. Resonance 5 adds the characteristic intensity of the Phase 90 without the harshness of maximum Resonance.
8-stage phase at moderate Rate — funk phaser character. 8-stage phase produces a denser, richer sweep than 4-stage. Rate 6 produces the moderately fast sweep of classic funk phaser (Larry Coryell, Brothers Johnson era). Resonance 6 adds the characteristic funky intensity.
12-stage phase at slow Rate with high Depth and Resonance — maximum psychedelic phase sweep. At 12 stages the PH-3 produces the densest, most complex phase sound. Slow Rate and high Depth creates a dramatic, slow-moving sweep. High Resonance adds the filter-like quality of self-resonance.
The Rise and Fall modes sweep the phase in one direction only rather than back and forth, producing a one-way filter sweep useful for building or releasing tension across a sustained passage.
4-stage phase at low Depth and Resonance keeps the effect as gentle background movement rather than an obvious sweep, adding dimension to clean arpeggios without drawing attention to itself.
Tips & Common Mistakes
- The Step mode produces a stair-step phase sweep rather than a smooth LFO — the phase jumps between fixed positions rather than sweeping continuously. Combined with a sync source (or tap tempo with a MIDI master), Step mode can create rhythmic phase patterns that lock to the tempo of a performance.
- Stage count is the single biggest tonal decision on this pedal — 4-stage gives the classic, subtle vintage phaser character; 8 through 12-stage produce increasingly dense, complex sweeps that read as a more dramatic, modern effect.
- Resonance interacts with Stage count — a given Resonance setting sounds more intense at higher stage counts, so revisit Resonance after changing Stage rather than assuming a fixed value translates across settings.
- This pedal is genuinely more versatile than a fixed 4-stage phaser, but that versatility means more time is needed to find a specific target sound — worth starting from a stage count matched to the genre being chased rather than the default.
- Placed before distortion or overdrive rather than after, this pedal phase sweep interacts with the following gain stage to create a more complex, swirling saturation than placing it after gain stages would.
FAQ
Boss PH-3 Phase Shifter — Common Questions
Best starting settings for Boss PH-3 Phase Shifter: Rate at 4/10, Depth at 5/10, Resonance at 5/10, Stage at 5/10. Adjust from there based on your guitar, room, and playing style.
For Classic Rock: Rate 3/10, Depth 5/10, Resonance 5/10, Stage 3/10. 4-stage phase at slow Rate — the classic Van Halen / Eruption phaser setting. The PH-3 in 4-stage mode at Rate 3 approximates the MXR Phase 90 character. Resonance 5 adds the characteristic intensity of the Phase 90 without the harshness of maximum Resonance.
For Funk: Rate 6/10, Depth 6/10, Resonance 6/10, Stage 5/10. 8-stage phase at moderate Rate — funk phaser character. 8-stage phase produces a denser, richer sweep than 4-stage. Rate 6 produces the moderately fast sweep of classic funk phaser (Larry Coryell, Brothers Johnson era). Resonance 6 adds the characteristic funky intensity.
Rate: LFO rate — speed of phase sweep. (Slow to Fast). Depth: Depth of phase modulation effect. (Mild to Deep). Resonance: Feedback amount — adds character and intensity to the phase effect. (None to High). Stage: Number of phase stages — more stages produces a denser, more complex sweep. (4-Stage to 12-Stage)
The Step mode produces a stair-step phase sweep rather than a smooth LFO — the phase jumps between fixed positions rather than sweeping continuously. Combined with a sync source (or tap tempo with a MIDI master), Step mode can create rhythmic phase patterns that lock to the tempo of a performance. Stage count is the single biggest tonal decision on this pedal — 4-stage gives the classic, subtle vintage phaser character; 8 through 12-stage produce increasingly dense, complex sweeps that read as a more dramatic, modern effect. Resonance interacts with Stage count — a given Resonance setting sounds more intense at higher stage counts, so revisit Resonance after changing Stage rather than assuming a fixed value translates across settings. This pedal is genuinely more versatile than a fixed 4-stage phaser, but that versatility means more time is needed to find a specific target sound — worth starting from a stage count matched to the genre being chased rather than the default. Placed before distortion or overdrive rather than after, this pedal phase sweep interacts with the following gain stage to create a more complex, swirling saturation than placing it after gain stages would.
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