The Warm Audio Mutation Phasor II is a Warm Audio phaser pedal, currently around $139.99. Close alternatives include the MXR Phase 95 and the MXR Phase 100. It pairs well with the Mesa Boogie Mark IIC+ Combo and the Friedman BE-Mini Head.
Warm Audio Mutation Phasor II
Warm Audio · pedal
The Warm Audio Mutation Phasor II is a faithful clone of the Mu-Tron Phasor II from Warm Audio (Austin, Texas), capturing the vintage electro-optical phaser character of the original Mu-Tron Phasor II at the accessible $149 price point. Described as one of the cleanest, most subtle phasers available, it adds a tasteful phase modulation rather than the extreme jet-plane swoosh of many phasers, with interactive controls that reward nuanced adjustment.
- subtle
- modulation
- optical
- phaser
- enhances tone
- overdrive
- drive
- unique modulation textures
Price updated Aug 26, 2026
Genres the Warm Audio Mutation Phasor II is commonly used in
- Funk
cited
Inferred from shared tonal signals, not a stated genre tag.
Amps that pair well with the Warm Audio Mutation Phasor II
Mesa Boogie Mark IIC+ Combo
Mesa Boogie
18% matchThe low gain tone has headroom to spare — Mesa Boogie Mark IIC+ Combo gives it high gain to fill it with
Friedman BE-Mini Head
Friedman
tonal matchRun Friedman BE-Mini Head into that low gain platform and it finally gets some high gain
Hughes & Kettner Warp 7
Hughes & Kettner
tonal matchRun Hughes & Kettner Warp 7 into that low gain platform and it finally gets some high gain
Synergy SL2 Module
Synergy
tonal matchRun Synergy SL2 Module into that low gain platform and it finally gets some high gain
Hiwatt Hi-Gain 100W Head
Hiwatt
tonal matchHiwatt Hi-Gain 100W Head's high gain fills in what this low gain tone doesn't make on its own
Hughes & Kettner Coreblade
Hughes & Kettner
tonal matchInto a low gain tone, Hughes & Kettner Coreblade brings the high gain it's missing
Friedman Phil X Signature
Friedman
tonal matchThe low gain tone has headroom to spare — Friedman Phil X Signature gives it high gain to fill it with
EVH 000
Evh
tonal matchInto a low gain tone, EVH 000 brings the high gain it's missing
Pedals that stack with the Warm Audio Mutation Phasor II
Wren and Cuff Box of War Small Foot Fuzz
Wren And Cuff
20% matchRun Wren and Cuff Box of War Small Foot Fuzz into that low gain platform and it finally gets some high gain
Greer Black Mountain
Greer
20% matchGreer Black Mountain's fuzzy fills in what this low gain tone doesn't make on its own
Red Witch Titan
Red Witch
7% matchPut Red Witch Titan after Warm Audio Mutation Phasor II in the signal chain, clear of Warm Audio Mutation Phasor II's own gain stage — goes in the amp's FX loop (or last, into a clean amp)
Boss DD-2 Digital Delay
Boss
7% matchBoss DD-2 Digital Delay's transparent voice goes after Warm Audio Mutation Phasor II in the signal chain — it's not there to compete with Warm Audio Mutation Phasor II's own low gain character — goes in the amp's FX loop (or last, into a clean amp)
Cusack Music Carolina Reaper Overdrive Fuzz
Cusack Music
tonal matchRun Cusack Music Carolina Reaper Overdrive Fuzz into that low gain platform and it finally gets some high gain
Dr. Scientist Frazz Dazzler V2
Dr Scientist
tonal matchDr. Scientist Frazz Dazzler V2's fuzzy fills in what this low gain tone doesn't make on its own
Crowther Prunes
Crowther
tonal matchInto a low gain tone, Crowther Prunes brings the fuzzy it's missing
EarthQuaker Devices Dirt Transmitter
EarthQuaker Devices
tonal matchEarthQuaker Devices Dirt Transmitter's fuzzy fills in what this low gain tone doesn't make on its own
Cheaper alternatives
Teisco Mini Analog Phaser
Teisco
90% similaritysimilar tone character
Behringer Dual-Phase
Behringer
89% similaritysimilar tone character
Valco Black Hole Vintage Phaser
Valco
89% similaritysimilar tone character
Walrus Audio FS Phaser
Walrus Audio
89% similaritysimilar tone character
Ibanez PH Mini Phaser Mini
Ibanez
89% similaritysimilar tone character
Boutique & premium upgrades
Electro-Harmonix Small Stone
Electro-Harmonix
70% similarity“Its more subtle, tasteful phasing compared to pedals like the EHX Small Stone suits players seeking phase that enhances tone rather than dominates it”
Citadel Planetary Phase
Citadel
64% similarityShared character: phaser, modulation
EarthQuaker Devices Grand Orbiter
EarthQuaker Devices
92% similaritysimilar tone character
EarthQuaker Devices Grand Orbiter Phase Machine V2
EarthQuaker Devices
90% similaritysimilar tone character
Dawner Prince Starla Tap Tempo Tremolo
Dawner Prince
89% similaritysimilar tone character
Similar charactersee all similar tone character →
MXR Phase 95
MXR
70% similarityShared character: phaser, subtle, modulation
MXR Phase 100
MXR
69% similarityShared character: phaser, subtle, modulation
T-Rex Sweeper 2
T Rex
66% similarityShared character: phaser, subtle, modulation
Mooer Trelicopter
Mooer
66% similarityShared character: subtle, modulation
Heavy Metal FX HMFX Phase Riot Factory Second
Heavy Metal Fx
65% similarityShared character: phaser, modulation
Spaceman Explorer 6-Stage Phaser
Spaceman
65% similarityShared character: phaser, subtle, modulation
See all alternatives to the Warm Audio Mutation Phasor II (cheaper + boutique) →
Questions people ask
What are good alternatives to the Warm Audio Mutation Phasor II?+
The closest matches in character are the MXR Phase 95, the MXR Phase 100, the T-Rex Sweeper 2. Budget picks: Teisco Mini Analog Phaser, Behringer Dual-Phase, Valco Black Hole Vintage Phaser. Boutique upgrades: Electro-Harmonix Small Stone, Citadel Planetary Phase, EarthQuaker Devices Grand Orbiter.
What pairs well with the Warm Audio Mutation Phasor II?+
Strong matches from rig and tone-complementarity evidence: Mesa Boogie Mark IIC+ Combo, Friedman BE-Mini Head, Hughes & Kettner Warp 7 — The low gain tone has headroom to spare — Mesa Boogie Mark IIC+ Combo gives it high gain to fill it with.
How much does the Warm Audio Mutation Phasor II cost?+
Around $139.99 (live listing price, updated Aug 26, 2026).
Compare
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