Used 2020s Keeley 4 Knob Compressor Effect Pedal

Used 2020s Keeley 4 Knob Compressor in Excellent condition—classic studio-style compression in a compact stompbox. Dial in smooth sustain or punchy dynamics with Level, Sustain, Attack, and Clipping controls, plus a handy internal trim for fine-tuning. Designed for low-noise operation and consistent feel, it runs on standard 9V DC pedal power (center-negative) and features true-bypass switching for a pure signal when off.