Used Keeley 4 Knob Compressor Effect Pedal

Used Keeley 4 Knob Compressor in good condition, delivering smooth, studio-style compression for guitar or bass. Simple 4-control layout (Sustain, Level, Attack, Clipping) makes it easy to add punch, sparkle, and longer sustain without sacrificing dynamics. Built in a rugged stompbox enclosure with true-bypass switching and standard 1/4" input/output, it runs on a 9V battery or optional 9V DC power supply for easy pedalboard integration.