Used Electro-Harmonix XO Q-Tron Plus Envelope Filter Effect Pedal

Add funky, touch-sensitive filter sweeps to your rig with this used Electro-Harmonix XO Q-Tron Plus Envelope Filter in good condition. Inspired by classic Mu-Tron-style tones, it delivers rich quacks, vowel-like wahs, and expressive auto-filter effects that react to your picking dynamics. Features include Low Pass, Band Pass, and High Pass modes, selectable sweep direction, adjustable Gain and Q (resonance), and 1/4" input/output for easy pedalboard integration. Great for guitar or bass.