Keeley C4 4-Knob Compressor – Serial #40081 – w/ Original BoxUp for sale is a legendary Keeley C4 4-Knob Compressor, hand-made in the USA. This unit is part of the final production run of the original classic circuit, featuring a high serial number (#40081).This is the expanded 4-knob version, giving you external control over Sustain, Level, Attack, and Clipping. It is widely considered one of the best "Ross-style" compressors ever made, offering studio-grade transparency and incredible sustain.Condition & Notes:

  • Electronics: 100% functional. The pots turn smoothly, and the compression is as thick and lush as the day it was made.
  • Cosmetics: The pedal is in good overall shape but is missing two of the original knobs. The potentiometer shafts are fully intact and can be easily turned by hand or replaced with standard 6mm knobs (available for a few dollars online).
  • Includes: The original boutique Keeley box,

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Listeda month ago
ConditionGood (Used)
Good condition items function properly but may exhibit some wear and tear.Learn more
Brand
Model
  • C4 4-Knob Compressor
Finish
  • Silver
Categories
Year
  • 2010s
Made In
  • United States

Product safety information may be available here.

BART’s Gear Haberdashery

Staten Island, NY, United States
Joined Reverb:2026

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