Used Electro Harmonix (E/H) OCTAVE MULTIPLEXER Filter Pedal

Electro-Harmonix Octave Multiplexer Filter Pedal

“Deep Analog Sub-Octaves with Sculpted Bass Response”

A Monophonic Sub-Octave Generator for Guitar, Bass, and More

The Electro-Harmonix Octave Multiplexer is a unique analog filter pedal designed to produce rich, sub-octave tones one octave below your original signal. Unlike traditional octave pedals, the Multiplexer focuses on bass-heavy textures and harmonic shaping, making it ideal for guitarists, bassists, and experimental musicians seeking deep, murky tones.

Its dual filter controls allow precise shaping of both the fundamental and harmonic content of the sub-octave signal. Whether you're chasing organ-like lows, fuzzy bass growl, or synth-style textures, this pedal delivers with analog warmth and tonal flexibility.

Highlights

• Analog sub-octave generator for deep bass tones

• Monophonic tracking—works best with single notes

• Dual filter controls for shaping harmonic content

• Blend knob for wet/dry signal mix

• Sub switch for toggling sub-octave activation

• Rugged enclosure with classic EHX styling

Specifications

• Type: Analog Octave / Filter

• Controls: Blend, Bass Filter, High Filter, Sub switch

• Power: 9V battery or 9.6VDC-200mA adapter (not included)

• Bypass: True bypass

• Dimensions: Standard EHX XO chassis

• Finish: Silver with black graphics

• Application: Guitar, bass, vocals, horns, studio effects

• Origin: USA