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Electro-Harmonix Q-Tron Plus
Elevate your sound to the funkiest of heights. The Q-Tron Plus envelope filter guitar effects pedal from Electro-Harmonix uses an innovative internal envelope follower to analyze your unique playing style and sweep the center of the envelope filter. You get auto-wahs that change dynamically depending on your pick attack. Plus, you can choose whether the sweeps go up or down. The Q-Tron Plus also features an effects loop and a Fast/Slow Attack Response dial.