Used Keeley C4 4 Knob Compressor Effect Pedal

Punch up your tone with this used Keeley C4 4-Knob Compressor in good condition, delivering smooth, studio-style compression for guitar or bass. Simple controls for Sustain, Level, Attack, and Clipping let you dial in everything from subtle leveling to snappy country pop and singing sustain. Built in a rugged compact stompbox format with standard 1/4" input/output and 9V DC power for easy pedalboard integration, it’s a reliable way to add clarity, sustain, and dynamic control.