Used Keeley 4 Knob Compressor Effect Pedal

Used Keeley 4 Knob Compressor in good condition, delivering smooth, studio-style compression for guitar and bass. The four controls (Sustain, Level, Attack, and Clipping) make it easy to dial in anything from subtle tightening to punchy, singing sustain. Built in a rugged compact enclosure with standard 1/4" input/output jacks, true-bypass switching, and 9V DC center-negative power, it’s a go-to pedal for clean, consistent tone on any board.