Warm Audio Mutation Phasor Ii

A 1970s Classic Revisited by Warm Audio

The Warm Audio Mutation Phasor II follows the tradition of phasers that defined the 1970s, an era when modulated textures redefined electric guitar, keyboards, and studio productions. Its electro-optical circuit and decidedly analog character aim to recapture those vintage vibes while remaining versatile enough for modern sounds. In the spirit of the Mutation line, the goal is clear: to offer a faithful recreation of a cult effect, with careful craftsmanship and handpicked components to preserve the character and musicality of the original design.

Who Is the Mutation Phasor II For?

This pedal is designed for musicians who want to enrich their sound without altering its essence: guitarists seeking percussive funk, textured rock, expressive leads, or psychedelic atmospheres, as well as keyboardists and bassists looking to add movement and depth to a simple line. It suits both beginners (thanks to its straightforward controls) and experienced players who want to precisely sculpt the speed and intensity of the sweep.

In the studio, the Mutation Phasor II is perfect for "animating" a rhythm track, thickening an arpeggio, or creating a sense of rotation on pads and organs. Live, it becomes a characterful pedal, easy to adjust between songs, and stable enough to remain clear in a mix.

Controls, Circuit, and Behavior: Essentials Underfoot

The pedal offers three main controls, designed to get straight to the sound. The Rate control adjusts the modulation speed, allowing you to go from a slow, wide movement to a fast, nervous whirl. The Depth sets the amount of phase shift: low for a subtle halo, high for a more pronounced effect. Finally, the Feedback adds resonance and personality to the sweep, with a more "vocal" and pronounced character when increased.

The Buffered Bypass is a real asset for many pedalboards: it helps maintain signal clarity and presence when the chain becomes long or loaded with effects. Regarding power, it can run on a 9-volt battery or via a 9-volt DC adapter (center negative), making it easy to integrate with most pedalboard power supplies.

Sound Character

The Warm Audio Mutation Phasor II emphasizes a warm, dense, and organic phasing sound, with a very "alive" sense of movement. At moderate settings, it adds an extra dimension to clean tones, a slight shimmer that remains musical without taking over. Increasing depth and feedback yields more psychedelic textures, with a wide, harmonically rich sweep ideal for floating intros, highly articulated funky parts, or leads that need to stand out without additional distortion.

Its character is particularly suited to creative production approaches and sounds inspired by artists known for their modulated textures, such as Billy Corgan, Tom Bukovac, or Robin Trower. Whether you're looking for a "classy" modulation to thicken a sound or a more demonstrative effect to transform an entire part, the Mutation Phasor II maintains a dynamic response and real interaction with your playing.

Technical specifications

Effects	Effects, Phaser	Type	Mains or battery
Technology	Analog	Use	electric guitar
Format	Pedal	Color	Multicolor

Circuit	electro-optical with feedback	Max Feedback	2 V RMS, 5.6 V peak-to-peak
Components	RC4558P op amp, vintage diodes, hand-selected film capacitors and carbon resistors	Signal-to-Noise Ratio	86 dB under 2 V input
Bypass	Buffered Bypass	Documentation	included
Controls	rate, depth, feedback	9-volt Battery	not included
Phasing Rate	0.1 Hz to 18 Hz	9-volt DC Adapter	not included
Frequency Response	20 Hz to 20 kHz	Current Draw	15 mA
Min Feedback	4 V RMS, 11.2 V peak-to-peak	Power Supply	9-volt battery (not included) or 9-volt DC adapter (center-negative, optional)