Pricing and availability

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Average Price: $315

High-end/Boutique

$75

$201+

Price Tier

Budget

Standard

High-end

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Description

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.

Perfect Circuit

Perfect Circuit

Vintage Musictronics Mu-tron Phasor II pedal

Video thumbnail for Vintage Musictronics Mu-tron Phasor II pedal by Perfect Circuit

Vintage Musictronics Mu-tron Phasor II pedal

Perfect Circuit

Perfect Circuit

Video thumbnail for 1974 MXR Phase 90 vs. 1975 Musitronics Mu-Tron Phasor II by Joe Perkins

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

Joe Perkins

Joe Perkins

Video thumbnail for George Duke - Mu-tron demonstration record 1975. by Adrian Täckman

George Duke - Mu-tron demonstration record 1975.

Adrian Täckman

Adrian Täckman

Video thumbnail for Musitronics Mu-Tron Phasor II Demo by Joe Perkins

Musitronics Mu-Tron Phasor II Demo

Joe Perkins

Joe Perkins

Video thumbnail for Phaser pedal comparison. Mu tron Phasor II and Maxon PH-350 by Riff

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

Riff

Riff

Video thumbnail for Phaser pedal comparison | Mu Tron Phasor II, Warm Audio Mutation Phasor, Luck Duck Nu Tron Phasor II by Riff

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

Riff

Riff

Video thumbnail for Playing Moog Matriarch through Mu-Tron Phasor II, Strymon Volante and Flint by Synthient Sound

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

Synthient Sound

Synthient Sound

Reviews

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

  • The Mu-Tron Phasor II is noted for its large size, which can be restrictive for live setups but excels in studio environments.

    Source
  • The Phasor II employs electro-optical phase control using the "photo-mod" circuit, similar to the Bi-Phase, with rate, depth, and feedback controls.

    Source

Use cases and applications

  • The Phasor II pairs exceptionally well with fuzz pedals, delivering modulated crunch tones reminiscent of classic rock sounds.

    Source
  • The Phasor II is praised for delivering an elegant ripple effect on fast settings, making it suitable for both guitar and synth applications.

    Source
  • The Phasor II is appreciated for its transparent and glassy sound, reminiscent of the 70s, making it a desirable choice for vintage sound enthusiasts.

    Source
  • The Phasor II is highlighted as a potential exhibit piece for museums or studios looking to capture the original sound of early analog synthesizers.

    Source

User experience

  • Owners describe the tone as "killer" and "funky," elevating it to a level beyond typical phasers.

    Source
  • It's been reported that the pedal's massive build results in a significant sonic presence, described as "singing" when played.

    Source
  • One owner experienced a static phase sound instead of a swoosh, indicating potential repair needs for optimal performance.

    Source

Comparisons

  • Compared to the Phasor III, the Phasor II is less bright, offering a more vintage, rolled-off high-end sound.

    Source
  • Owners note that while the Small Stone phaser offers a heavy swirl on slow settings, the Phasor II maintains elegance even at fast speeds.

    Source

Value and pricing

  • A user reported purchasing the Phasor II for around $225 in 2017-2018, highlighting its relative affordability compared to its rising vintage value now.

    Source
  • A vintage original Phasor II in great working condition was recently offered for sale at $300, showcasing its collectible appeal.

    Source

Setup and maintenance

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

    Source

4.5 out of 5

Based on 1 Review and 3 Ratings

5 star
4 star
3 star
2 star
1 star
jimmarchi1

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.

Artist usage

Add artist
See how Billy Corgan uses Mu-Tron Phasor II

Billy Corgan

Keyboardist, Guitarist

The Smashing Pumpkins

...
Verified via YouTube

At 0:35 minute mark, Corgan's Mu-Tron Phasor II can be seen.

See how Courtney Barnett uses Mu-Tron Phasor II

Courtney Barnett

Singer, Guitarist

...
Verified via Photo

Courtney Barnett is seen using the Mu-Tron Phasor II in an Instagram post where she discusses her involvement in the soundtrack for "The Buccaneers."

See how James "Munky" Shaffer uses Mu-Tron Phasor II

James "Munky" Shaffer

Guitarist

Korn

...
Verified via Photo

A Mutron can be seen used in the studio

See how Robin Trower uses Mu-Tron Phasor II

Robin Trower

Guitarist

Procol Harum

...
Verified via Archive

Mentioned in the July 1980 issue of Guitar Player, with the details summarized in this March 13, 2009 Gibson article.

Guitar Player, July 1980, "British Rock Guitar Veteran"

From your left to right, how is your pedalboard currently set up?

The first effect is a preamp that Mike built, which is on all the time. The second is another volume booster, a Dan Armstrong Red Ranger, which I use for even greater sustain. Third is my Tycobrahe wah-wah. The fourth is the Fender Blender. The fifth is the Univibe, and the sixth is a Mu-tron II. The seventh and eighth are Mistresses with different settings; the one on the left gives a double-tracking effect, while the one on the right provides more of a flanged sound. But I think I've come to a halt as far as effects go. I mean, I can just barely handle what I've got now. There's so much stuff going on that if you just started mixing them there would be a limitless number of combinations you could get.

From your pedalboard, where does the signal go?

Into a splitter box, then to my amps. I don't use a mixing board or anything when I'm live because I like to be very much in control of what's going on. Especially concerning dynamics, that's so much a part of my music that I wouldn't feel happy if someone else were controlling it. I like to be creating the sound.

Gibson, "How To Get That Robin Trower Sound", March 13, 2009

Trower’s hottest rig blasted his array of Strats through a pair of 100-watt Marshall JMP-100 Mark II heads feeding two 1960-B 4x12 cabs and had an impressive effects chain on the floor: custom preamp and clean booster pedals, a Dan Armstrong Red Ranger treble booster, a Tychobrahe wah-wah, an octave/fuzz Fender Blender, a Uni-Vibe chorus/vibrato, Mutron II phase shifter, and two Electro-Harmonix Electric Mistresses.

See how Bradford Cox uses Mu-Tron Phasor II

Bradford Cox

Singer, Guitarist

Deerhunter

...
Verified via YouTube

In the video titled "Bradford Cox (Deerhunter) in his home studio (2024)," uploaded by Jenny Ondioline on YouTube, Bradford Cox explicitly describes his recording setup and confirms his use of the Mu-Tron Phasor II, as originally captured from the Instagram account of nahoko_otsuka.

See how Eddie Hazel uses Mu-Tron Phasor II

Eddie Hazel

Singer, Guitarist

Funkadelic

...
Verified via Premierguitar

"Eddie started right out learning the pedals—the wah wah, the Big Muff, and phasers and shit. We bought all the gadgets in the world, [especially] once Bootsy got with us." - George Clinton

See how John Dyer Baizley uses Mu-Tron Phasor II

John Dyer Baizley

Singer, Guitarist

Baroness

...
Verified via Premierguitar

According to Premier Guitar, Baizley also has the Mu-Tron Phasor II pedal.

See how Efrim Menuck uses Mu-Tron Phasor II

Efrim Menuck

Guitarist, Keyboardist

Godspeed You! Black Emperor

...
Verified via Memoire Online

Efrim Menuck is documented as using the Mu-Tron Phasor II, as noted in the article "Le post-rock et sa sous-estimation au cinéma" on Memoire Online.

See how Daniel Rossen uses Mu-Tron Phasor II

Daniel Rossen

Singer, Guitarist

Grizzly Bear

...
Verified via YouTube

You can See Daniels pedalboard at 2:29.

See how Tom Bukovac uses Mu-Tron Phasor II

Tom Bukovac

Guitarist

Trip the Witch

...
Verified via YouTube

A lot of people apparently think i am saying “Neutron” in this video...its actually a Mu-tron Phasor II....great pedal...they usually sell in the 400-ish range. A couple other phasers (or phasOrs as some say) that are contenders for the “alltime greatest” category...the original Electro-Harmonix Small Stone...and the 70s Electro-Harmonix Poly Phase (great sound, if you can get past the volume drop when the effect is engaged)<

See how Guy‐Manuel de Homem‐Christo uses Mu-Tron Phasor II

Guy‐Manuel de Homem‐Christo

Keyboardist, Composer

Daft Punk

...
Verified via Photo

In a photo of Le Knight Club/Draft Punk's studio, where Guy‐Manuel de Homem‐Christo is a member, a Mu-Tron Phasor II is visible, highlighted by a yellow square and arrow.

See how Steve von Till uses Mu-Tron Phasor II

Steve von Till

Guitarist

Neurosis

...
Verified via MusicRadar

"After the delay is the Mu-Tron Phasor II. That’s the mother of all phasers - all the others seem one-dimensional to me. It’s the better half of the Mu-Tron Bi-Phase, which is a must for home-studio filter nerds! I’ve got one of those, too. You can hear it all over every record since [2004’s] The Eye Of Every Storm. There are entire parts where I play one note over two minutes using this phaser at a slow speed because I can disappear in it; it’s the perfect sweep. It’s hard to find and really expensive - I’ve got three and only one sounds right. That’s the one that goes out!"

Album Usage

The Mu-Tron Phasor II has been featured on the following albums:

Used With

Based on how musicians on Equipboard use Mu-Tron Phasor II, it is most commonly used with the following gear.

Mu-Tron Phasor
Mu-Tron Phasor Phaser Effects Pedals
2
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2
Moog Moogerfooger MF-102 Ring Modulator
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2
Boss OC-2 Octaver
Boss OC-2 Octaver Harmonizer & Octave Effects Pedals
2
Strymon TimeLine
Strymon TimeLine Delay Effects Pedals
2
Fender  '65 Twin Reverb
Fender '65 Twin Reverb Combo Guitar Amplifiers
2
Mu-Tron C-200 Volume-Wah
Mu-Tron C-200 Volume-Wah Multi Effects Pedals
2
Electro-Harmonix Big Muff Pi
Electro-Harmonix Big Muff Pi Fuzz Effects Pedals
2
Roland AP-5 Phase Five
Roland AP-5 Phase Five Phaser Effects Pedals
2

7 alternative and related items for Mu-Tron Phasor II, curated by the Equipboard community.

Mu-Tron Phasor II (Reissue)

 

newer similar sound cheaper alternative

Mu-Tron's current, ultra compact reissue of the original Phasor II.

Mu-Tron Phasor III

$279.00

newer similar sound cheaper alternative

The current reissue version, sold by the new Mu-Tron company.

Mu-Tron Phasor

$298.00

Vintage or Discontinued similar sound

The original, less well known version of the Mu-Tron Phasor, featuring simply a rate and depth knob.

Mu-Tron Mu-FX Phasor 2X

 

Vintage or Discontinued newer similar sound

A modded version of the classic Phasor II, created as part of the brand's revival.

Warm Audio Mutation Phasor II

$125.00 - $149.00

similar sound cheaper alternative

A more affordable, faithful recreation of the Mu-Tron Phasor II.

Chase Bliss Audio Wombtone

$336.00

Vintage or Discontinued similar sound mod

An analog phaser with digital controls, based around the Mu-Tron Phasor II.

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Gear Guides

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    kkolar
    kkolar

    Gear IQ 120646