![StompBoXed - The Guitar Pedal Builders Repository: EH Octave Multiplexer | Guitar pedals, Diy guitar pedal, Diy guitar amp StompBoXed - The Guitar Pedal Builders Repository: EH Octave Multiplexer | Guitar pedals, Diy guitar pedal, Diy guitar amp](https://i.pinimg.com/originals/c2/39/9b/c2399be999c14577eeee5599f562781c.gif)
StompBoXed - The Guitar Pedal Builders Repository: EH Octave Multiplexer | Guitar pedals, Diy guitar pedal, Diy guitar amp
![File:X² prototype - four-quadrant-multiplier-based squarer, similar to other octave-up effects, but better (2007-02-12 23.53.08 by germanium).gif - Wikimedia Commons File:X² prototype - four-quadrant-multiplier-based squarer, similar to other octave-up effects, but better (2007-02-12 23.53.08 by germanium).gif - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/2/23/X%C2%B2_prototype_-_four-quadrant-multiplier-based_squarer%2C_similar_to_other_octave-up_effects%2C_but_better_%282007-02-12_23.53.08_by_germanium%29.gif)
File:X² prototype - four-quadrant-multiplier-based squarer, similar to other octave-up effects, but better (2007-02-12 23.53.08 by germanium).gif - Wikimedia Commons
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