Used Keeley 4 Knob Compressor Effect Pedal

Used Keeley 4 Knob Compressor in Excellent condition—classic studio-style compression in a rugged stompbox. Dial in the perfect feel with four easy controls: Sustain, Level, Attack, and Clipping, delivering everything from subtle leveling to snappy country squeeze. Designed for standard 9V DC center-negative power and built for reliable, low-noise performance, it adds smooth sustain, tighter dynamics, and enhanced note clarity for guitar or bass on any pedalboard.