The Warm Audio Mutation Phasor II is a 100% analog electro‑optical phase‑shifting pedal that faithfully recreates the lush, “swirly,” and psychedelic tone of the original 1970s circuit. Built with premium RC4558P op‑amps, carbon resistors, film capacitors, and vintage‑style diodes, it delivers rich modulation and instant funk. Housed in a sturdy steel enclosure, its visual design oozes vintage vibe while offering modern reliability—perfect for guitar, keys, bass, or wherever you want to add depth and movement to your tone.

• True‑to‑original analog circuit: Faithful re‑creation of the 1970s electro‑optical phase‑shifting design for vintage authenticity.
• Premium RC4558P op‑amps: Delivers warm, smooth phasing—just like the classics.
• Vintage‑style diodes, carbon resistors & film caps: Hand‑picked components for genuine analog tone and reliability.
• Heavy‑duty steel enclosure: Rugged stepped metal housing with vintage aesthetic and roadworthy durability.
• Intuitive 3‑knob layout: Rate, Depth, and Feedback controls arranged vertically for easy, familiar tweaking.
• Feedback control: Adds intensity and swirl for rich, immersive effects—from subtle motion to full-on psychedelic swirl.
• Buffered bypass: Preserves your signal strength when the pedal is off.
• 150 mA, 9 V DC operation: Standard power supply compatibility (battery operation also supported).

Whether dialing in silky Pink Floyd‑style phasing or deep, experimental swirls with rich undertones, the Mutation Phasor II stands out with its authentic vintage circuitry and robust build. It’s a tone‑shaping tool that offers both sonic heritage and modern versatility. 

Ernie Williamson Music is a full‑line music store offering sales, service, rentals and the best lesson programs in the area. We are a "Best of the Ozarks" award winner, ranked in the top 100 music stores in the US, the number one Taylor Guitar dealer in Missouri, and a top 20 Taylor Guitar dealer in the US. We're a locally owned store with friendly, knowledgeable staff—but we make sure our prices compete with the big box stores. Whether you shop online or come by one of our four regional locations, you'll get excellent service, quality gear, and low prices.