If you're in the market for bottomless sub-octave possibilities in a compact package, the Electro-Harmonix Octave Multiplexer is knocking at your door. The pedal's ability to drop any monophonic signal an octave makes this pedal ideal for solo artists looking for a fuller sound, experimental music, and wild bass sounds from virtually any instrument. This pedal bas been produced in both an older box larger format, as well as a smaller more recent enclosure which is sometimes referred to as the XO version.

Product Specs

  • Octave Multiplexer Analog Sub-Octave Generator (XO)
  • Silver / Black
  • 2010s

From the Price Guide

Reviews for the Electro-Harmonix Octave Multiplexer XO Analog Sub-Octave Generator
Help another musician by sharing your experience!
  • The sweetest pedal

    Verified Purchase

    Easy to use, a lot more fun with the Sub on. Does a great bass on wound strings and has the nicest overtones on the treble strings, at the same time. I think I could almost leave this on all the time.

  • Some PWR Adapters may produce 60 cycle hum

    Verified Purchase

    Induced noise from using inferior wall PWR adapters can be a downer. 60 cycle hum is so common with cheap PWR adapters. But found a low cost PWR adapter that did not induce 60 cycle hum with the Electro-Harmonix Octave Multiplexer. Also, a perfect clean sounds can be possible using a rechargeable …

  • noisy pedal. it takes a while but you can find a good sound

    Verified Purchase

    This pedal goes from ok sounding to outright horrible noises. you have to take the time to dial it in just right but then when you switch instruments its not really usable. i also found that it makes a horrible whistling noise when played through gain setting on amp or behind a pedal. i give it a 3 b/c it works if you work at it.

  • Ehh

    Verified Purchase

    It's not a piece of garbage, but the only useful part is the high filter where as the low filter is kind of awful

  • Some good and bad

    Verified Purchase

    I am using this pedal with bass, and If you're outside the sweet spot range-wise, tracking is not great. On the plus side, the sub switch and high and low filter controls give you a lot of tonal options, including the ability to get some very synth-like sounds. So, whether it will work for you or n…