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  • Fairfield Circuitry Randy's Revenge Ring Modulator FX Pedal

    *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: Modulation
    • Made In Canada
    • A pedal like no other
    • Chorus, phaser, vibrato and flanger type effects
    • Great for guitar, bass, synths, keys and drums
    • LoFi capabilities
    • Signature stamped bare enclosure
    • Built with top quality components
    • True bypass
    • Current draw 40 mA max.
    • 2 years manufacturers warranty
    • 9V DC centre negative
    • Protected against reversed polarity and overvoltage conditions


    • Free UK shipping from orders of £200 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. 

    What Do Fairfield Circuitry Say?

    Shallow Water’s essence could be characterized as uncertain, subtle and nostalgic. Practically, this describes an effect built around your typical analogue chorus/vibrato circuit wherein the signal is delayed by a few dozen milliseconds using a bucket brigade device. Another signal then modulates this delay
    time to create changes in pitch, called vibrato. Chorus is achieved by mixing the original signal with the delayed signal, creating the moving comb filters that tickle our ears and feather our bangs. Still, major differences can be noticed when studying the k-field modulator’s architecture. The most striking are how the delay time is modulated in a random fashion and how the recovery filter moves in relation to the input signal.

    Both these differences place Shallow Water in a category of its own, appropriately called k-field modulators.

    As the present gets lost, the future becomes the past.


    The random quality of the modulation begins in a simple program residing on a microcontroller. Its output resembles steps of random voltages, seperated by random time intervals. The RATE control effectively sets the overall range of these time

    These random stepped voltages are processed through a filter/
    integrator, giving control over the slope at which the steps
    will reach their new values. As DAMP is increased, the random
    steps become slow and sluggish, instead of sharp and abrubt.
    DEPTH defines the amount of modulation that will be used to
    modulate the time delay of our input signal. There is a strong
    interaction between all three controls affecting modulation; that
    is, RATE, DAMP and DEPTH.

    Once the input signal has passed through the delay line, a
    recovery filter and some kind of gate is necessary to remove
    unwanted noise generated by the bucket brigade device. To
    achieve this, the input’s envelope is followed and used to modulate the frequency of a low pass filter. The amount of envelope is set by the LPG control, yielding bouncy, lo-fi responses to quick and snappy gate-like behaviours.

    K-Field Modulator Playlist