Mutation Phasor II – Electro-Optical Phaser WA-MPH

This listing is for a brand new pedal. Professor Nigel's is an authorized Warm Audio dealer.

Warm Audio Mutation Phasor II

Electro-Optical Phase-Shifting Pedal With Feedback Circuit

Professor’s Notes

The Mutation Phasor II is for players who want more than subtle shimmer — they want movement that’s alive. From syrupy psychedelic swirl to funky wobble, this phaser brings dimension to your tone. Clean chords shimmer, dirty leads breathe, and the whole mix feels bigger.

Description

The Warm Audio Mutation Phasor II is an authentic recreation of a swirly phaser made famous in the experimental era of the 1970s. With its electro-optical design and feedback circuit, the Mutation Phasor II delivers lush modulation textures that became a hallmark of recordings by innovators like Billy Corgan, Tom Bukovac, and Robin Trowerwarmaudio.com.

• A 70s Legend for Experimenting: Add depth, wobble, swirl, or “instant funk” to guitar, keys, bass, or any source. The Mutation Phasor II captures the iconic psychedelic tones of the original ’70s design.
• Maximum Depth: The Depth control expands the sweep range, producing the wide, immersive modulation expected from vintage all-analog phasers. Turn it up for soaring highs and deep lows.
• Rate Switch: Adjust the speed of the phase effect from ultra-slow (1/10 sweeps per second) to fast wobble (up to 18 sweeps per second).
• Feedback: Increase the Feedback control to intensify the phase-shifted signal, emphasizing the sweeps and creating dramatic textures—especially at slower rates.
• Lush Studio Sound, Road-Worthy Build: Built with premium components like RC4558P op-amps, vintage-style diodes, carbon resistors, and film caps, housed in a tough steel chassis with vintage styling.
• Hand-Tested in Austin, TX: Each pedal is meticulously tested by musicians and technicians at Warm Audio’s Austin headquarters for quality and consistency.

From “chewy,” under-water textures to rich, psychedelic phasing, the Mutation Phasor II is more than just a pedal—it’s a tone-shaping instrument in its own right.

Specifications

• Electro-optical phase-shifting pedal with feedback circuit
• Controls: Rate, Depth, Feedback
• Sweep range: 0.1 Hz – 18 Hz
• Premium components: RC4558P op-amps, diodes, carbon resistors, film caps
• Through-hole analog circuit construction
• Durable steel enclosure with vintage vibe finish
• True to original ’70s design
• 1/4" input (instrument) and output (amp) jacks
• Power: 9V battery or standard 9V DC pedal adapter
• Hand-tested in Austin, TX

What’s Included

• Warm Audio Mutation Phasor II pedal
• Original packaging
• Printed user guide