Mu-Tron Phasor II

^# 35

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$315.00 Price Tier: High-end

4.5 (3)

1 Review

This product is Vintage or Discontinued

Newer option

Mu-Tron Phasor III

$396.00

5.0 (1)

Find out who is using Mu-Tron Phasor II

9 wishlisted

20 saved

Page last updated Jun 27, 2026

Pricing and availability

We compare 600+ stores and found this item at 1 store. Prices updated June 27, 2026.

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Reviews

Price

5.0 (11)

$315.00 10 available Used

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Average Price: $315

High-end/Boutique

$75

$201+

Price Tier

In the Phaser Effects Pedals category, Mu-Tron Phasor II is priced in the High-end/Boutique range. This premium gear is built to very high standards and offers premium features.

Budget

Standard

High-end

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Description

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Unleash your sonic potential with the Mu-Tron Phasor II, a powerful and versatile guitar pedal that's steeped in music history. Birthed from the innovative minds at Mu-tron (Musictronics), this pedal offers an upgraded phasing experience, complete with adjustable feedback, depth, and rate controls. Hailing from an era where sonic exploration was the norm, the Mu-Tron Phasor II is your passport to new tonal landscapes, delivering a rich and immersive phasing effect that truly stands out.

Key Features: - Adjustable feedback, depth, and rate controls - Robust yet straightforward design, perfect for live performances - Produced by Mu-tron (Musictronics), a pioneer in musical effects - Part of a line of innovative products created between 1976 and 1981

Product specs

Brand	Mu-Tron
Model	Phasor II
Finish	White
Year	1977
Made In	United States
Categories	Phaser Pedals

FAQs

What distinguishes the Mu-Tron Phasor II from other phaser pedals?: The Mu-Tron Phasor II features exclusive feedback circuitry that produces a pronounced sweeping effect, even at slow phasing rates. It is known for its extremely low noise and high signal-handling capability, which minimizes distortion.
Is the Mu-Tron Phasor II suitable for live performances?: Yes, the Mu-Tron Phasor II is well-suited for live performances due to its robust build and distinctive phasing effects that stand out in a live mix. Its low noise and high signal handling ensure clarity and reliability on stage.
How does the Mu-Tron Phasor II handle distortion?: The Mu-Tron Phasor II is designed with circuitry that provides freedom from distortion, allowing it to maintain a clean signal even at high input levels. This makes it ideal for use with both clean and distorted tones.
Can the Mu-Tron Phasor II be used with instruments other than guitar?: Yes, the Mu-Tron Phasor II can be used with other instruments, such as keyboards and bass guitars, to achieve its unique phasing effects. Its versatility makes it a popular choice for various musical applications.

Videos

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Perfect Circuit

Vintage Musictronics Mu-tron Phasor II pedal

Perfect Circuit

1974 MXR Phase 90 vs. 1975 Musitronics Mu-Tron Phasor II

Joe Perkins

George Duke - Mu-tron demonstration record 1975.

Adrian Täckman

Musitronics Mu-Tron Phasor II Demo

Joe Perkins

Phaser pedal comparison. Mu tron Phasor II and Maxon PH-350

Riff

Phaser pedal comparison | Mu Tron Phasor II, Warm Audio Mutation Phasor, Luck Duck Nu Tron Phasor II

Riff

Playing Moog Matriarch through Mu-Tron Phasor II, Strymon Volante and Flint

Synthient Sound

Reviews

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PROS

Produces a vintage, 70s phasing effect that's unmatched
Offers a wide range of sounds from subtle to radical
Integrates seamlessly with the original guitar signal for a musical effect
Can be set to sound "chewy", "watery", "fat", and "full"
Versatile functionality with the Phasor II model
Harmonic, full, and spacey sound quality
Adds a unique vintage vibe both in sound and appearance
Every setting between subtle and radical sounds good
Heavy duty construction; durable over decades

CONS

Prone to malfunction or stop working, especially due to its age
Causes tone and volume loss when in bypass mode
Experiences a level drop when put in a true bypass loop
Larger size may require extra space on a pedalboard

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Mu-Tron Phasor II.

Features and functionality

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The Mu-Tron Phasor II is noted for its large size, which can be restrictive for live setups but excels in studio environments.
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The Phasor II employs electro-optical phase control using the "photo-mod" circuit, similar to the Bi-Phase, with rate, depth, and feedback controls.
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Use cases and applications

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The Phasor II pairs exceptionally well with fuzz pedals, delivering modulated crunch tones reminiscent of classic rock sounds.
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The Phasor II is praised for delivering an elegant ripple effect on fast settings, making it suitable for both guitar and synth applications.
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The Phasor II is appreciated for its transparent and glassy sound, reminiscent of the 70s, making it a desirable choice for vintage sound enthusiasts.
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The Phasor II is highlighted as a potential exhibit piece for museums or studios looking to capture the original sound of early analog synthesizers.
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User experience

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Owners describe the tone as "killer" and "funky," elevating it to a level beyond typical phasers.
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It's been reported that the pedal's massive build results in a significant sonic presence, described as "singing" when played.
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One owner experienced a static phase sound instead of a swoosh, indicating potential repair needs for optimal performance.
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Comparisons

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Compared to the Phasor III, the Phasor II is less bright, offering a more vintage, rolled-off high-end sound.
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Owners note that while the Small Stone phaser offers a heavy swirl on slow settings, the Phasor II maintains elegance even at fast speeds.
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Value and pricing

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A user reported purchasing the Phasor II for around $225 in 2017-2018, highlighting its relative affordability compared to its rising vintage value now.
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A vintage original Phasor II in great working condition was recently offered for sale at $300, showcasing its collectible appeal.
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Setup and maintenance

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Owners have encountered issues with non-functioning phasers due to poor connection at the Rate pot, often resolved by replacing with regular wire.
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4.5 out of 5

Based on 1 Review and 3 Ratings

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1 star

jimmarchi1

41029

over 8 years ago

set phasers to stun

great 70s phasing effect... tone/volume sucker in bypass. Effect has a level drop when put in a true bypass loop, not unlike the 70s small stone I used to own. I love mutron's modulation effects. Prior to this I had a Phasor I and it was also sweet in a different way. I used to have their ultra rare flanger with the wah-type treadle on loan from this junky dude but eventually I had to give it back. Its a bummer. That was a nice flanger. Same problem as the phasor II with the tone sucking and level dropping, but still. Nothing sounds like Mutron gear. I use this when I'm recording more then 80 smallstone or mxr phasers. It sounds better for most things I want to do. There's a biphase setting on all the line6 gear and that gets close if you set it right but the biphase is obviously going to be more extreme at most settings, its a crazy effect. But yeah, for recording I ue this real deal guy for a lot of shiznit. I've had it a long time. Got it around 2001 I think? Right after I got my 70s small stone off my buddy in exchange for my vox wah wah.

Roles:

Guitarist Bassist Keyboardist

Genres:

Electronic Orchestra Alternative rock