Guyatone PS3 Phase Shifter


  • Depth
    controls the depth/amplitude of the modulation (the size of the range in which the effect sweeps).
  • Speed
    controls the speed/rate of the LFO wave that controls the effect



Originally designed to filter out noise in radio transmissions, phase shifting came into popularity as an effect for musical instruments in the early 1970s with the introduction of the Maestro PS-1. Since then, Phase Shifters have been used extensively to imitate the swirling, airy effect of a Leslie rotating speaker cabinet and their shimmering, liquid quality helped define the sound of Funk guitar.

The Guyatone PS-3 Phase Shifter reproduces all the drippy, funky, swirling sweeps of the most popular vintage Phasers, and at a fraction of their price tags! The PS-3's amazingly transparent, four-stage phasing circuit is based on the vintage MXR Phase 90, considered by many to be the holy grail of phasers. However, the PS-3's oscillator features a unique asymmetrical sweep pattern that is slow rising up to the peak frequency and faster coming off. This unorthodox sweep pattern adds a more natural, Doppler-like feel to the phasing effect that is strikingly similar to the sound of a Rotary Speaker cabinet (if you've ever had an ambulance drive past you with it's siren on, you'll know what we mean). Variable Rate and Depth controls allow for precise adjustment of the effect and can produce a wide variety of phasing flavors. Low Depth settings with the Rate around 12 o'clock yields classic phase shifting, while higher Rate and Depth settings delve into the fast and furious territory of the vintage Univibe - all this without sacrificing your guitar tone or breaking your bank!

If you're looking for a new twist on an old favorite, the PS-3 is the one!


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  • Input Impedance
    470K ohm
  • Output Impedance
    1k Ohm
  • Speed Frequency
  • Power Voltage
    DC9V (Battery) / DC9 V (AC Adaptor)
  • Current Consumption
    10 mA
  • Dimensions
    2.75" W x 3.875" L x 1.5" H
  • Weight (w/o battery)
    7.6 oz


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