SubDecay Prometheus



  • Depth
  • Up/Down (toggle)
  • Waveform (toggle)
  • HP/BP/LP (toggle)
  • Freq
  • Step
  • Rate
  • Intensity



The Prometheus is a voltage controlled 12dB filter which can be manipulated by playing dynamics or an internally generated signal.

What's it do?

The Prometheus is everything you've ever wanted in a filter pedal.

  • Loads of headroom
  • Reasonable size (measures about 3.7x4.7 inches)
  • Highpass, Bandpass, and Lowpass filtering with adjustable intensity (resonance)
  • Forward and reverse envelope following
  • Sample/Hold step filtering based on 3 different wave forms.
  • No special power supplies required. Operates with a single 9 volt battery or standard 9 volt adapter.

All that and it has some "hidden features" as well:

  • The LFO rate can be adjusted to run much faster than the the step rate. This can be used to create very interesting arpeggiation.
  • The Depth knob can push the filter cutoff frequency outside of the audio range. This can be useful to create a slow attack effect.
  • The step rate can be turned up high enough for smooth modulation. This can be used to create and autofilter effect, that can sound similar to a phaser or tremolo.
  • A fixed filter effect is possible by turning the depth knob down all the way, and using the Frequency knob to set the filter cutoff.

Other features:

  • The Prometheus is hand made in Newberg Oregon with high quality components.
  • Die cast aluminum enclosures for durability.
  • 3PDT switches for true bypass switching.
  • Runs for many hours on a single 9 volt battery, or can be powered by a 9VDC adapter.
  • Blue LED indicator.



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