Used Keeley 4 Knob Compressor Effect Pedal

This used Keeley 4 Knob Compressor pedal in good condition delivers classic, studio-style compression for guitar and bass with smooth sustain and enhanced clarity. The four easy controls—Sustain, Level, Attack, and Clipping—let you dial in everything from subtle leveling to punchy squash, while the true bypass design preserves your tone when off. Built in a rugged compact enclosure and powered by standard 9V DC, it’s a go-to dynamic tool for any pedalboard.