Keeley 4 Knob Compressor Pedal (Discontinued)

89 out of 100. Incorporating 150+ ratings and reviews.


Company founder Robert Keeley was once known for modifying mass produced pedals to make them sound good, first of which was a Ross compressor. Fast forward to today, Keeley electronics has grown into a manufacturer of original design pedals, which include their popular 4 Knob Compressor.

Staying true to their reputation, this compressor pedal features premium components, which include hand-matched transistors, metal film resistors and capacitors, all of which work together to provide quiet and clean compression as attested to by many users. As the label implies, this compressor pedal has four knobs that let you better fine tune your compression, including Sustain, Level, Attack and Clipping.

Most of the reviews describe the Keeley 4 Knob Compressor as very clean and great sounding, even those who complained about cosmetic/exterior flaws still gave their thumbs up to its overall sound. Many experienced users appreciate the pedal’s compatibility with different guitar and pickup types, although some cautioned that the learning curve for tweaking can be a bit longer than expected.

With its high ratings, the Keeley 4 Knob Compressor is easy to recommend, especially if you are looking for something that can work with different guitar types.

If you can’t find one available to buy then check out our guide to The Best Compressor Pedals.


  • Metal Film Resistors and Capacitors
  • Hand-matched Transistors
  • Parameters: Sustain (Compression), Level (Volume), Attack and Clipping (Input Sensitivity).
  • True Bypass


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