Louder Than Liftoff

Pentode Tube Saturation Colour


  • Fully Assembled

Pentode is the first module to bring true tube saturation to the Colour format. True to the spirit of the Colour format, Pentode employs minimal, carefully selected components to achieve a coveted, vintage tone. A single NOS tube running at its true plate voltage is overdriven to produce the musical saturation that can only be described as "tube color."


  • Employs a Raytheon 6418 subminiature tube
  • Dedicated DC filament power supply
  • Class-A output stage
  • Compatible with the Colour 500 Palette

Pentode is offered fully assembled and tested by Louder Than Liftoff. It and LTL's other Colours will not be available as DIY kits.

Note on Tube Microphonics

There is a real vacuum tube in this thing. One thing that real tubes have that emulations don't is microphonics. Due to the vibration sensitive nature of the 6418 tube, some units may experience a low-level ringing for a couple seconds when the unit is bumped or the bypass/engage switch is pushed. 


See audio tab for more samples.

There something so visceral and satisfying about listening to audio reproduced by a tube circuit. Pentode increases the perceived loudness of your source by saturating the transients (audio sorcery!) and adding musical 2nd and 3rd order harmonic distortion. As the ratio of RMS to peak energy grows by turning up Colour's Saturation knob, sonic density is magnified, volume is increased, and the sound becomes gigantic. That's why we like to call Pentode a Gigantifier!

-Brad McGowan, Designer, Louder Than Liftoff

Real analog plugins.

Colour is a new format for analog audio gear designed for and by the DIY community. We took our favorite sounding analog circuits and put them on modules that are small, affordable, and swappable.

The Colour format consists of Colours and Palettes:

Colours are ultra-compact, pluggable analog circuit blocks that impart various types of analog color. Check out our ever-growing selection of Colours. Colours can be designed and released by anyone.

Palettes provide controls, power, and support circuitry for Colours. We currently offer the Colour 500 Palette and CP5 Mic Preamp with Colour.

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