Used Electro-Harmonix Pico Swello Attack Filter Effect Pedal

This used Electro-Harmonix Pico Swello Attack Filter is in excellent condition and delivers expressive auto-swell and envelope filter tones in a compact pedalboard-friendly footprint. Dial in smooth volume swells, percussive filter pops, or vocal-like wah effects with intuitive controls for Attack, Sensitivity, and Resonance, plus mode options to shape your response. True bypass switching preserves your core tone when off, and standard 9V DC power keeps your rig simple and reliable.