JHS Legends of Fuzz Mary-K Pedal

JHS Legends of Fuzz Mary-K Pedal

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Kay Musical Instruments was founded by Henry "Kay" Kuhrmeyer on July 1, 1931. Although Henry quickly shifted production focus to all types of stringed instruments (including basses, violas and guitars), they didn’t enter the guitar pedal market until the late 1960s with a series of knobless, treadle-based, delightfully odd plastic pedals. Each of these four units (the Fuzz Tone F1, Tremolo T1, Wah Wah W1 and Bass Boost B1) were housed in treadle-based enclosures allowing one parameter of each effect to be adjusted by foot.

The Kay Fuzz Tone was most likely released in late 1968/early 1969. Initially designed as a low-cost-version of the Shin-ei/Univox Superfuzz, this fuzz is one of The Edge's (U2) go-to pedals. 54 years later, JHS is releasing their own spin on the Kay Fuzz Tone: the Mary-K. They've even added knobs and an expression pedal output for those who want to use it as it was originally intended.

Rather than using a treadle chassis, JHS allow Mary-K users the option to control the Frequency knob with an expression pedal. They recommend the Nektar NX-P and Roland EV-5 expression pedals, but many other options should also work. Be advised: some expression pedals may introduce a hum/noise into the signal chain in high electromagnetic interference environments. Therefore, JHS recommend using plastic chassis expression pedals with short cables to avoid unwanted noise in a high EMI environment.


  • Volume: Controls overall output volume. Left is less, right is more.
  • Frequency: Controls the frequency response. Left is darker, right is brighter.
  • JHS Mode: Increases the fuzz level with more pronounced mids.


  • Connectors: 1/4" input, 1/4" output, expression jack (plug in an external expression pedal with a TRS cable to control the frequency response while playing)
  • Power Requirements: 9V battery or 9V DC negative centre power supply (PSU not included)
  • Current Draw: 4mA
  • Dimensions: 5.68" x 3.62" x 2"
  • Weight: 0.85 lbs.