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Electro-Harmonix XO Stereo Polyphase Guitar Effects Pedal

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The Electro-Harmonix Stereo Polyphase Effects Pedal resurrects the popular Polyphase pedal as part of the Electro-Harmonix XO
die-cast series.

Now in stereo and an improved housing, t... Read More

Available 11-08-2015 You will not be charged until order ships. Email me when this is in stock.

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The Electro-Harmonix Stereo Polyphase Effects Pedal resurrects the popular Polyphase pedal as part of the Electro-Harmonix XO
die-cast series.

Now in stereo and an improved housing, the Stereo Polyphase Effects Pedal features the same features and controls that so many
guitarists loved and relied on to crank out lush, otherworldly tones from the original.

Featuring envelope/sweep switch, feedback level, rate, envelope sensitivity, envelope modulation, and modulation rate.

  • stereo polyphase XO demo music
  • Controls
  • Env./Sweep: Switches the effect between a phaser with an adjustable speed automatic sweep, and a phaser with an envelope-driven sweep mode.
  • Feedback: Controls the phaser
  • feedback/resonance
  • Rate
  • Env. Sens.: Controls the sensitivity of the effect to the input signal.
  • Env. Mod.: Controls the depth of the envelope controlled sweeps
  • Comes equipped with a 24 Volt/100mA AC external power adapter. Use only the power adapter supplied.
One year warranty on pedals. 90 day warranty on all other products.

Pro Coverage gives you added warranty protection for your new gear. Stepping in where the manufacturer's "normal wear and tear" coverage ends, our Pro Coverage program offers you upgraded coverage if your product ever fails Read More.

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  • Repair costs covered for up to three years from date of purchase
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  • Customer Reviews

Review Snapshot®

by PowerReviews
Electro-HarmonixXO Stereo Polyphase Guitar Effects Pedal

(based on 1 review)

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Reviewed by 1 customer

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(3 of 3 customers found this review helpful)


Great effect


from San Diego, CA

Comments about Electro-Harmonix XO Stereo Polyphase Guitar Effects Pedal:

This is a great stompbox! I use it to convert my mono microphone into a great stereo track and record with Logic Pro. I also like to throw either the Voice Box or V256 before it, and use a good condenser mic (Audio Technica AT2020). I love the wide range of sounds possible. The only downside of the Polyphase that I notice is that the Start and Stop need to be tuned well for best effect, and my voice going up an octave changes the sound. I'm sure, with more practice, I'll learn how to make better use of its' features. All of these Electro-Harmonix boxes are outstanding, well built, and worth what they cost.

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