The Lumen is a State Variable FET-Based Overdrive.  It marks a return to the overdrive world for Hungry Robot Pedals.  

Under the hood, it contains an active State Variable Filter, a type of filter that is common place in the synth world.  State Variable Filters offer more clarity and presence than standard passive tonestacks.  A typical passive tonestack works by removing tonal content, a State Variable Filter works by actively amplifying frequencies that are already present in your signal.  The filter is actually made up of 3 individual filters (low pass, band pass, high pass) that split the incoming signal into 3 frequency ranges and amplifies those ranges without tone loss.    

While designing The Lumen, I challenged myself to create an overdrive that used no diode clipping.  The most common approach for an overdrive is to send an amplified signal into a clipping section where diodes chop up the waveform and distortion is create.  I opted for a more natural approach of cascading FET gain stages.  The distortion is created by soaking the transistors with gain.  To me, this method provides a more organic, tube-like saturation than a clipping section.  

And to top it all off, The Lumen also has a clean blend, allowing you to mix back in some of your clean tone.  At 12 o'clock, the clean signal is near unity gain.  Past 12 o'clock, it amplifies your clean signal.  

The Lumen

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  • RETURN POLICY: If the pedal is not to your liking, it may be returned within 5 days.  You will be charged a 20% restocking fee.

    REPAIR POLICY: All repairs within 30 days are done at no cost to you.  After 30 days, I charge a $10 bench fee to cover parts, labor, and return shipping.  To initiate a repair, email me at

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