Used Keeley 4 Knob Compressor Effect Pedal

Used Keeley 4 Knob Compressor in Good condition, delivering the classic studio-style squeeze that keeps notes even, punchy, and musical. Simple four-control layout—Sustain, Level, Attack, and Clipping—lets you dial in everything from subtle leveling to country snap or singing lead sustain. Built in a rugged compact stompbox enclosure, it runs on standard 9V DC pedal power and features true-bypass switching for a clean, unaffected tone when off.