Vintage 1975 Mu-Tron Phasor, Fully Restored, Original Analog Funk Machine

USD320.00

Step back into 1975 with this beautifully restored Mu-Tron Phasor - the legendary analog phaser that defined the sound of funk, fusion, and psychedelic rock. This is the original version (pre-Phasor II), hand-built by Musitronics in the USA, and it delivers that unmistakable warm, liquid sweep that modern pedals still try to replicate.

This unit has been professionally refurbished and restored to factory spec by the expert techs at Mad Slav Amps in Beaverton, Oregon:

All filter capacitors replaced for long-term reliability
Original circuit fully inspected, cleaned, and serviced
Jacks and pots cleaned, no crackle or noise
100% functional, clean bill of health
Cosmetically and electronically, it’s in remarkable condition for its age, very clean inside and out.

The Underdog Story

Every classic has a story, and this one’s no exception.
Back in the 1970s, the original owner added a rear input jack and toggle switch, most likely to alternate between acoustic and electric guitars. A clever mod for its time! Those changes have since been professionally rolled back by Mad Slav Amps. The holes were cleanly filled with sturdy plugs, leaving the enclosure structurally sound and looking tidy while restoring its original signal path and tone.

This Phasor is now back to its true 1975 self, fully original in function and tone, yet carrying the spirit of an era when musicians weren’t afraid to experiment.

Why It’s Special

The Mu-Tron Phasor was one of the first truly musical phasers, lush, smooth, and organic. Its sweep has a warmth and clarity that still sets it apart from anything digital. Plug it in and you’ll instantly understand why these units became studio staples and stage favorites.

Famous Users (Phasor / Phasor II)

Jerry Garcia (Grateful Dead)
Stevie Wonder
Bootsy Collins
Larry Graham (Sly & The Family Stone)
Frank Zappa
The Edge (U2)
Condition

Exceptionally clean and recently serviced. Fully functional, no scratchy pots, no noise, no issues — ready to plug in and play.

This isn’t just a pedal, it’s a piece of history, lovingly restored and ready for another half-century of music-making.

Ships fast, packed carefully, with a clean bill of health from Mad Slav Amps.
Bring home the sound of 1975, this Mu-Tron Phasor is the real deal.

1 of 6