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T-Rex Engineering Octavius Octave Guitar Effects Pedal Pink 

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The T-Rex Octavius is a tri-tone generator with a perfect set of controls and a brilliant BOOST function. Octavius gives you everything you could wan...Read More

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See All T-Rex Engineering Harmonizer, Pitch Shifter, Octave & Ring Modulator Effects Pedals

Triple your impact.

The T-Rex Octavius is a tri-tone generator with a perfect set of controls and a brilliant BOOST function. Octavius gives you everything you could want in octave generation—plus incredible T-Rex tone.

Octavius lets you get that classic octave-down effect you'll recognise from Hendrix' "Machine Gun" and other recordings. But it also lets you add in a high octave so you can hit your audiences with a sonic wall of 3-octave lead lines.

You can mix the octaves however you want to create your own signature sound. And the pedal features a controllable boost button to help you lift your solos up above the mix.

An octave divider or any other pedal is only as good as it sounds, and you can count on Octavius to deliver all the warm, vintage-sounding tone you'd expect from T-Rex.


Octavius tri-tone generator has 4 controls: LO OCT, HIGH OCT, MASTER MIX and BOOST.

The LO OCT knob lets you set the volume of the lower octave signal produced by the pedal.

The HIGH OCT knob controls the volume of the higher octave signal produced by the pedal.

The balance between the levels of these 2 knobs is what creates your particular octave-divided sound.

The MASTER MIX knob lets you set the overall volume of your low and high octaves compared to your direct signal.

Use the BOOST knob to control the output of your octave-divided sound. The boost function lets you dial in a solo level, whether the overdrive circuit is activated or not.

  • Low and High octave circuits
  • Master mix and Boost controls
  • Battery or DC powered

Get an octave above and below. Order today.


Octavius Octave Guitar Effects Pedal

  • Input Impedance@1KHz: Higher than 1M ohm
  • Output Impedance@1KHZ: Lower than 1K ohm
  • Power supply: 12V DC, 800 mA external power supply. Runs on 100/115/230V AC/50–60Hz, dependent on country
  • Minimum Power supply Voltage: 8,5V DC
  • Maximum Power supply Voltage: 12,5V DC
  • Current Draw @ 9V DC: 155 mA
  • Maximum Input signal Vp/p: 2,7 Vp/p
  • External connectors: Input Jack, Output Jack, 9-12V DC Jack
  • Size Box: Box 100x120x35mm + switches and knobs
  • Weight: 660 grams packed in box

Review Snapshot®

by PowerReviews
T-Rex EngineeringOctavius Octave Guitar Effects Pedal

(based on 1 review)

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Reviewed by 1 customer

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(5 of 5 customers found this review helpful)


Awesome array of sounds

By curtisb

from Ottawa, ON

About Me Experienced


  • Durable
  • Excellent Sound Quality
  • Good Selection Of Effects
  • Intuitive


    Best Uses

    • Guitar and Bass
    • Home Studio
    • Professional Recording
    • Stage

    Comments about T-Rex Engineering Octavius Octave Guitar Effects Pedal:

    Very cool pedal. Adds a lot of depth. Use it mainly for the lower octave to fatten up my lead tone, but with upper-octave engaged you can get some very sweet 12-string sounds, and even synthy sounds if dialed up full. The octave spearation is very clear... you can hear distinct notes, even with 3 octaves engaged (hi, low, and clean tone). Very warm sounding. The boost works great on its own, and I cleared room on my board by gettign rid of an LPB-1 booster. I just use the Octavius boost as my boost pedal.

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