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T-Rex Engineering Quint-Machine Guitar Octave Pedal 

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Turn your guitar into so much more, with individually adjustable octave up, octave down and 5th up enhancement. Classic octave doubling is cool, but ...Click To Read More About This Product

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See All T-Rex Engineering Harmonizer & Octave Effects Pedals

Tunable octaves and fifths.

Turn your guitar into so much more, with individually adjustable octave up, octave down and 5th up enhancement. Classic octave doubling is cool, but throwing in a 5th up and giving all 3 modulated sounds their own volume control opens up a whole new world. Sound like a 12-string. Sound like an organ. Get rid of your dry signal and sound like a synth just owning that lonely heart. T-Rex built the Quint Machine to give you more, and it will keep you discovering new sounds for years.

  • Octave up, octave down, 5th up
  • Individual volume controls, plus master mix
  • Ultra-fast polyphonic tracking
  • Replicate organ, synth or 12-string sound

Discover a whole new world of possibilities with tunable octaves and fifths. Order today.


Quint-Machine Guitar Octave Pedal

  • Input Impedance@1KHz: Higher than 1M Ohm
  • Output Impedance@1KHZ: Lower than 1K Ohm
  • Power supply Voltage 9V DC: Minimum 8V DC / Maximum 12,5V DC
  • Current Draw @ 9V DC: 145 mA
  • Maximum Input signal Vp/p: 3Vp/p
  • Battery Type / Battery Life: 9V battery 6F22 / 30-60 min.
  • External connectors: Input Jack, Output Jack, 9V DC jack
  • Controls: ON/OFF switch, Mix, +1 Octave, -1 Octave, +1 fifth
  • Pedal size incl. knobs (W x H x D): 60 x 50 x 117 mm / 2,4 x 2 x 4.6"

Review Snapshot

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T-Rex EngineeringQuint-Machine Guitar Octave Pedal

(based on 1 review)

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Issues on arrival

By Oinkus

from Yorktown VA

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  • Octave up,octave down and a fifth


  • Working properly

Best Uses

    Comments about T-Rex Engineering Quint-Machine Guitar Octave Pedal:

    Something wrong with the switching , poor QA to send something out that does not work properly. Got it to work intermittently after struggling with it for 30 minutes or so. Nice to have the 3 options and be able to blend them together.The sound is pretty digital and synth-like so if you are after a pristine analog octave this might not be the best choice.Returning it and not getting a replacement.My first Trex pedal and it will be my last , you only get one chance to make a first impression.

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