Used Electro-Harmonix Doctor Q Nano Envelope Filter Effect Pedal

The Electro-Harmonix Doctor Q Nano Envelope Filter is a compact, expressive effect pedal that delivers classic auto-wah style funk tones in a space-saving design. This analog pedal dynamically responds to your playing, creating a sweep effect that’s perfect for funk, rock, and experimental sounds. Housed in a rugged, die-cast chassis, it features a simple control layout with a Q switch to adjust the filter’s response and a gain knob to tailor sensitivity to your input signal. This used unit is in Good condition, showing minor cosmetic wear but fully functional with solid tone and reliable performance. Powered by a standard 9V battery or optional 9V power supply (not included), the Doctor Q Nano is pedalboard-friendly and built to last. Whether you're looking to spice up your solos or add rhythm texture, this envelope filter brings vintage-style quack and character to your signal chain with ease.