Used El Nano Doctor Q Envelope Follower Effect Pedal

Used and in good condition, the Electro-Harmonix El Nano Doctor Q Envelope Follower is a compact and expressive auto-wah pedal that delivers dynamic tone shaping for guitar or bass. This analog effect responds to your playing intensity, offering a distinctive, funk-inspired touch-controlled filter sweep. Housed in a rugged, pedalboard-friendly nano chassis, it features simple controls including a Gain knob and switchable Bass Boost for added low-end presence. Powered by a 9V battery or optional power supply (not included), the Doctor Q is perfect for players seeking vintage envelope filter tones with minimal fuss.