The Harvestman
Black Locust Guitar FX Adaptor - 16HP

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Item: N13-4872

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Black Locust Guitar FX Adaptor - 16HP


Black Locust is a 4-channel guitar effects pedal adaptor for your synthesizer. 

This module is a re-release of the old, hand-built “STILTON ADAPTOR” module with a smaller panel size (16HP) and more expansion options. 

Using a compact arrangement of TRS insert sockets (cables not included), Black Locust properly attenuates and amplifies signals to incorporate your guitar effects into the modular system. A return gain control and a wet/dry mix knob condition the effected signal for maximum utility in a modular context. Instruments such as electric guitars and basses can also be patched directly into the module. 

Black Locust is the first of three modules in the FEEDBACK CONSOLE series. With no external input signals, the four pedals can operate in a closed feedback loop, self-generating audio signals that are impossible to directly control - only influence. 

If a Black Locust's channel is to be used as a Send/Return, connect a guitar pedal with a 1/4" insert cable - on one end it must have two mono plugs (TS) and on the other a stereo plug (TRS). The tip (red) is connected to the pedal's output and the ring (white) is plugged the effect input.Now use the 3.5mm input and output sockets to use the pedal with the modular system; set the level with the Gain potentiometer and the effect amount with the dry/wet control.

If you just wanna amplify an electric guitar or bass guitar, to process it by the modular, connect the instrument with an unbalanced 1/4" cable.

Further modules like a matrix mixer and a programmable quad VCA/envelope follower/signal router, each designed to create a "feedback console" with the Black Locust which will render possible controllable feedback paths between the individual channels and effects. 

This module is a gateway to this highly experimental patching technique. Further modules in the FEEDBACK CONSOLE series include a matrix mixer and programmable quad VCA/envelope follower/signal router, each designed to expand the Black Locust for deeper exploration of the feedback technique. 

You will quickly discover sounds that you will never hear again.


  • FX Send style routing for Eurorack modular
  • TRS in and out with one channel
  • Gain staging for external instruments
  • Wet/Dry mix for each channel
  • Gain control for each channel
  • Provides 3.5mm inputs and outputs for units with only 1/4th" jacks

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  • Eurorack Module
  • Width: 16HP
  • Depth: Skiff Friendly
  • Standard Eurorack 12V Power

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