Used Keeley 4 Knob Compressor Effect Pedal

The used Keeley 4 Knob Compressor delivers studio-grade compression in a compact, pedalboard-ready format. In great condition, it features four controls—Level, Sustain, Attack, and Clipping—for precise tonal shaping. This true bypass pedal runs on standard 9V power and is ideal for guitarists seeking enhanced sustain and dynamic control without coloration. Built in the USA, it’s perfect for adding clarity and punch to clean tones or tightening up high-gain settings.