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Average Price: $190
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$75
$201+
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Description
Introducing the Maestro PS-1A Phase Shifter, the unsung hero of vintage phaser effects pedals. This iconic pedal, first produced in 1976, provides musicians with a simplistic yet versatile phasing experience. It is equipped with three set speeds, giving users the power to create a wide range of sonic textures. This pedal is a must-have for those who appreciate a good ol' classic.
Key Features:
- Category: Musical Instruments > Guitar Pedals & Effects > Phaser Effects Pedals
- Simple phase shifter with three set speeds
- Notable for its vintage charm and versatility
- First produced in 1976
- Ideal for creating a wide range of phasing effects
Product specs
| Brand | Maestro |
| Model | Phase Shifter PS-1A |
| Finish | Black |
| Year | 1970s |
| Made In | United States |
| Categories | Phaser Pedals |
FAQs
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What type of power supply does the Maestro PS-1A Phase Shifter require?
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The Maestro PS-1A Phase Shifter is designed to be powered by a standard 9V battery, as it was originally manufactured in the 1970s before modern power supply standards.
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How does the Maestro PS-1A Phase Shifter sound compared to modern phaser pedals?
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The Maestro PS-1A Phase Shifter is renowned for its warm, vintage analog tone, which is often described as lush and organic, differing from some modern digital phasers that may offer more precision but less warmth.
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Is the Maestro PS-1A Phase Shifter suitable for live performances?
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Yes, the Maestro PS-1A Phase Shifter is suitable for live performances, offering a rich, vintage phasing effect that can enhance guitar tones on stage, though its size and battery power requirement should be considered.
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Can the Maestro PS-1A Phase Shifter be used with instruments other than guitar?
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While primarily designed for guitar, the Maestro PS-1A Phase Shifter can also be used with other instruments like keyboards or bass, providing a unique phasing effect across various sound sources.
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What are the control options available on the Maestro PS-1A Phase Shifter?
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The Maestro PS-1A Phase Shifter features three control knobs for adjusting the depth, rate, and intensity of the phasing effect, allowing for a range of modulation from subtle to pronounced.
Videos
Marco Tiraboschi
Maestro Oberheim Phase Shifter PS-1A DEMO
Maestro Oberheim Phase Shifter PS-1A DEMO
Marco Tiraboschi
VIntage Maestro Phase Shifter PS-1A Demo Gravity Music Gear Led Zeppelin
Brad
Maestro PS 1A Phase Shifter Demo (clean and distortion)
Guitar Pedal Demos
Maestro PS1A Phase Shifter
fxdoctormedia
Reviews
Owner Insights
We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Maestro PS-1A Phase Shifter.
Features and functionality
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The smooth transition between speeds when switching off the fast mode while slow mode is on creates a unique braking effect, likened to a jet engine slowing down.
Source
Use cases and applications
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Favored by enthusiasts for its 'early Rush in a box' effect, appealing to fans of classic rock tones.
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It is noted that the phaser sound can sometimes feel separate from the instrument, as experienced with a Wurlitzer, yet still delivers a cool effect.
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Some users have creatively used the pedal to achieve organ-like sounds with instruments like pedal steel, highlighting its versatility beyond traditional guitar use.
Source
Value and pricing
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Purchased for $380 plus shipping, seen as a good deal as it included the original box and manual, with prices on Reverb typically higher.
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User experience
Comparisons
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The Maestro PS-1A is often mistaken for similar-sounding units like the Univibe, but its unique ramping speed feature distinguishes it, enhancing its appeal for Big Star fans.
Source
Mods and upgrades
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The rare PS-1B version includes a variable speed knob, offering additional control, unlike the more common PS-1A, which lacks this feature.
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4.0 out of 5
Based on 0 Reviews and 4 Ratings
Artist usage
Add artist
Interview German Synth Mag Amazona.de: Als wenn das alles nicht bereits eine gewisse Materialschlacht wäre, nein, auch die Abteilung Effektgeräte war reichhaltig bestückt. Eventide Phaser, Flanger und Harmonizer, Binson Echorec 2, Fender Dimention IV, Maestro Phase Shifter, AKG BX10 und BX20 Echo, Roland PH-830 Phaser und RV-800 Reverb, Leslie 147 Rotary Speaker Cabinet, Lexicon Prime Time und 224.
A PS-1A is visible throughout this excerpt of Series 4, Episode 15 of the The Old Grey Whistle Test (aired January 17, 1975), with an explicit closeup at 0:56 at Martyn's prompting.
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Ian Fowles used a Maestro PS-1A Phase Shifter on the record, as noted in his Instagram post.
Michio posted this photo of his pedals to Twitter, November 2021
Ella Feingold uses the Maestro PS-1A Phase Shifter, as evidenced by a photo she posted of her live pedalboard on her Instagram stories, where the pedal is clearly visible at the bottom left.
In the video titled "My Synth Studio Revealed | Studio Tour 2025," Anthony Marinelli is seen discussing the Maestro PS-1A Phase Shifter at 29:50, where it is placed on the top row of the Korg MS Series Wall.
In a July 2018 Instagram post by Empty Country, Joseph D'Agostino is shown using the Maestro PS-1A Phase Shifter.
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In this Guitar Geek page you can see all the Christopher Thorn's Pedalboard.
During Jean-Luc Ponty’s takeover of the Eventide Effects blog, he discusses his early effects use, including the Maestro PS-1A.
The first effect I got was a Maestro phase shifter, with 3 different speeds, switching speeds gave a similar effect to what the Hammond organ did with the Leslie, either speeding up or slowing down the vibrato effect while playing.
This unit can be seen on the left side of John's SG.
In a live performance video posted by Stones Throw on Instagram, John Carroll Kirby uses the Maestro PS-1A Phase Shifter.
Album Usage
The Maestro PS-1A Phase Shifter has been featured on the following albums:
Genre Usage
Based on how artists on Equipboard use this gear, it is most commonly found in the following genres.
Used With
Based on how musicians on Equipboard use Maestro PS-1A Phase Shifter, it is most commonly used with the following gear.
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An updated version of the legendary Maestro PS-1, this piece of gear has been meticulously re-engineered to meet the demands of today's musicians while retaining all the charm of the original. Expect nothing less than an all-analog phaser that delivers a warm and smooth sound.
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According to Heptode;
The Virtuoso Phase Shifter is a boutique recreation of the original Maestro®* PS-1A Phase Shifter, as used in the 1970's by keyboardist John Paul Jones (Led Zeppelin) and guitarists Steve Howe (Yes), Alex Lifeson (Rush), Ernie Isley (Isley Brothers), among many others.
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