• Fairfield Circuitry Randy's Revenge Ring Modulator FX Pedal [Pre-Order] - Pedal Jungle
  • Fairfield Circuitry Randy's Revenge Ring Modulator FX Pedal - Pedal Jungle
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Fairfield Circuitry Randy's Revenge Ring Modulator FX Pedal

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*This is a Special Order item that we order quickly and directly from our suppliers after your purchase and ship to you within 4-10 days.*Fairfield Circuitry...

*This is a Special Order item that we order quickly and directly from our suppliers after your purchase and ship to you within 4-10 days.*

Fairfield Circuitry make such cool and unique pedals; all with that signature bare bones enclosure and hand stamped goodness, and Randy's Revenge is no exception!  

Randy's Revenge is a super cool ring modulator, that will turn your creativity up a notch or two!


The Details
  • Special Order Item
  • Expected to ship within 4-10 days
  • Effect: Ring Modulation
  • Made In Canada
  • A pedal like no other
  • Rich trem/vibe type effects
  • All analog
  • Signature stamped bare enclosure
  • Built with top quality components
  • True bypass
  • Current draw 85mA max.
  • 2 years manufacturers warranty
  • 9V DC centre negative
  • Protected against reversed polarity and overvoltage conditions
What Do Fairfield Circuitry Say?

At its finest, in a considerably small package, powered by your typical 9V power supply, all analogue, hand stamped, pure sine wave oscillator, low-pass filtered with a touch of class and apparently musical. These are the requirements of warp speed space travel; a regular occurrence when dealing with Randy's hardware. 

The lower oscillator frequencies create rich trem/vibe effects, excruciatingly slow or chopped up rhythmic flavours. As the frequency goes up, thick bells, tuned intervals, low-fidelity synth-like effects are only the beginning. Experimenting with the low-pass filter cutoff frequency and the dry/wet mix will yield tones as strange or subtle as desired.

Featuring expanded control voltage (CV) capabilities that allow for interactions beyond the simple stacking of effects, Randy can be used to control and be controlled by other CV capable devices. The stereo CV is switch-programmable for use with an expression pedal or as a 2-channel CV port. Both the oscillator and low-pass filter frequency are voltage-controllable. The internal oscillator is also available as an output, turning Randy into a stand-alone voltage-controlled oscillator (VCO).


The VCO generates a low distortion sine wave whose frequency
can be controlled in many ways. The HI/LO switch sets the operating range of the VCO; LO for 0.5Hz - 45Hz, HI for 18Hz - 2.4kHz. The FREQ control sets the oscillator’s rate within the selected range. The shape of the waveform sent to the analogue multiplier is selected with SQ/SI switch; SQ for square, SI for sine.

The effect commonly known as ring modulation is simply the
multiplication of two signals. The result of which is the sum and
difference of all frequencies involved. Ideally, this also means
that none of the original signals should be present in the output.
In reality, all multipliers exhibit some degree of bleedthrough. As is the case with noise in general, bleedthrough will become more audible when higher gain is involved.

Located after the multiplier, the second order low-pass filter
affects only the modulated signal, not the clean one. This proves useful in taming the incoherent mess generated by the multiplication. The LPF control sets the cutoff frequency of the filter.

When engaged, the input is first buffered by a discrete JFET gain stage, providing an ideal interface for instrument level sources and a characteristic tone. The MIX control is quite simple, ranging from fully dry to fully wet. The output level is set with VOLUME control. Unity gain is obtained when the control is set around noon. When disengaged, the signal is true bypassed.

By default, the control voltage (CV) jack is to be used with an expression pedal to control the oscillator’s frequency. Expression pedal must follow the “wiper to tip” standard. It is possible to do much more with the CV jack by understanding the micro-switches located inside the pedal.

Shipping & Returns


  • Free UK RM48 shipping from orders of £100 or more
  • Orders despatched within 1-2 working days
  • Always tracked worldwide shipping
  • Plastic free packaging as standard


30 day peace of mind return policy, but please read our terms and conditions, returns and refunds policy before placing an order. 

Hear Randy's Revenge in action