Heuristic Industries

Fulcrum

Boost and EQ Pedal

A high-headroom clean preamp designed with simplicity and durability in mind.

$150
Quantity:
1

Features

Fulcrum is a versatile and unopinionated gain staging and frequency sculpting tool.

  • Gain control capable of ±20dB boost/cut
  • Tilt EQ for broad tonal adjustments
  • Internal 30V power supply
  • Capable of line-level inputs and outputs
  • Knobs "snap in" at their unity positions
  • "Hold for momentary" bypass switching
  • High quality buffers preserve signal integrity
  • Over-voltage protection

Usage

Fulcrum's utility lends itself to a wide variety of situations:

  • Push amps and other pedals to the point of breakup (or further!)
  • Combine gain and EQ to cut through the mix during solos
  • Add a master volume and/or tone control to pedals that lack them
  • Bring lower level signals up to line level
  • Bring line level signals to instrument level
  • In amp and pedal effects loops for easy EQ adjustments
  • Make sweeping EQ changes to synthesizers, drum machines, and samplers to better fit in the mix

Demos

Specs

  • Power: 9V center-negative 2.1mm connector
  • Bypass: buffered
  • Current draw: max 75mA (depending on LED brightness)
  • Input impedance: 1MΩ @ 1kHz
  • Output impedance: 100Ω @ 1kHz
  • Size: 4.8 x 2.6 x 1.56 inches

Revision History

Rev 1: initial version

Rev 2 (12/2025):

  • Lowered power consumption
  • Fully solid state switching system
  • Improved SNR and noise rejection
Fulcrum guitar pedal, from above
Fulcrum guitar pedal from the top; input, output, and 9V DC input jacks
Fulcrum guitar pedal from the front