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MXR M101 Phase 90 Phaser Pedal

Phase Effects Pedal for Guitar, Bass, and Keyboards

Item ID: Phase90

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M101 Phase 90 Phaser Pedal with EBS Patch Cables

Original price, crossed out: $114 and 99 cents, now $109 and 99 cents

Modulation Pedal Pack

Original price, crossed out: $423 and 95 cents, now $395 and 00 cents

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MXR M101 Phase 90 Phaser Pedal

$99.99

Gator Cableworks Backline Series Instrument Cable - 10 foot

$14.99

EBS Flat Patch Cable - 3.9 Inch (2 Pack)

$15.00

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MXR M101 Phase 90 Phaser Pedal

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Q: What kind of effect does the MXR Phase 90 produce?

The MXR Phase 90 delivers a classic, swirling, and watery modulation effect that has defined countless iconic guitar tones. It creates a rich, psychedelic sweep, adding depth and movement to your sound. From subtle undulations to fast, warbling textures, this analog phaser is a staple for guitarists, bassists, and keyboardists looking to add a distinctive sonic character to their music.

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Q: How do I control the sound of the MXR Phase 90?

The MXR Phase 90 is renowned for its simplicity, featuring just one large "Speed" knob. This single control allows you to adjust the rate of the phasing effect, from a slow, gentle sweep to a rapid, intense wobble. Its straightforward design makes it incredibly easy to dial in your desired sound quickly, letting you focus on playing.

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Q: What are the power requirements for the MXR Phase 90?

The MXR Phase 90 can be powered by a single 9V battery or an optional 9V DC power supply (sold separately). It has a low power consumption of just 5mA, making it efficient for pedalboards. Sweetwater offers a wide selection of compatible power supplies to keep your pedal running smoothly.

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Q: Is the MXR Phase 90 easy to integrate into an existing pedalboard?

Yes, the MXR Phase 90 is designed for easy integration. Its compact size (2.25" W x 4.25" D x 1.25" H) and standard 1/4" input/output jacks make it simple to fit into almost any pedal chain. Its true hardwire bypass ensures your signal remains unaffected when the pedal is disengaged, preserving your tone.

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Our Product Research Team

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The Classic Phaser Found in Rigs of Guitar's Elite

The MXR Phase 90, the wildly popular phase pedal, has found its way into the rigs of guitarists as wide ranging as Eddie Van Halen to Dave Grohl to Josh Homme to Nancy Wilson, as well as countless other discerning guitarists looking to add a touch of shimmer to solos. The Phase 90 also provides smooth, watery effects to chords and muted strumming. Not just confined to guitar, the Phase 90 fares equally well on bass, keyboards, or vocals.

MXR Phase 90 Features:

Simple, single knob operation
Wide range of sounds
Works well with guitar, bass, keyboards, and vocals
Knob varies speed from subtle to fast, watery warble
Battery operation or with optional AC adapter (sold separately)

Resources

Best Guitar Pedals for Beginners

Mar 3, 2026

Steve Vai | What's on Your Pedalboard, Beat Edition

Feb 25, 2025

Play The Guitar Pedal Game & Giveaway

Sep 20, 2024

All MXR Phase 90s Compared

May 3, 2022

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Tech Specs

Pedal Type: Phaser
Analog/Digital: Analog
Inputs: 1 x 1/4" (instrument)
Outputs: 1 x 1/4"
Bypass Switching: True Hardwire
Power Source: 9V DC power supply (sold separately)
Power Usage: 5mA
Batteries: 1 x 9V
Height: 1.25"
Width: 2.25"
Depth: 4.25"
Weight: 0.84 lbs.
Manufacturer Part Number: M101

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Reviews

4.7

Customer Photos & Videos

Shout out to Aaorn Hawley at Sweetwater. This is the exact phase I wanted. Its simple and no frills and easier to dial in than my former Green Boss Phase

there is something that no digital pedal does yet well and that is to emulate modulation effects, use both the Fractal FM3 and the Kemper Stage and both come close but not quite, I thought the sound was going to be too excessive or too light, but the ending is just what your ears ask for. countless recordings recorded that sound in your memory so it is difficult for it to sound bad to you, I only give it 4.5 because I would like them to find a way to add some extra function to this case, I know that the mini P95 exists but I do not like the mini pedals and the P100 is already too big

Not a lot of frills or controls, just a basic awesome sound from a classic pedal with metal construction.

The MXR phase 90 is a perfect no frills no nonsense phazer for me.

Like the original.

See also: Phasers, MXR, MXR Phaser Pedals

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MXR M101 Phase 90 Phaser Pedal

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M101 Phase 90 Phaser Pedal with EBS Patch Cables

Modulation Pedal Pack

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