Used Keeley Neutrino Effect Pedal

The used Keeley Neutrino Envelope Filter pedal offers dynamic, touch-sensitive filter effects perfect for funk, rock, and experimental tones. In good condition with minor cosmetic wear, this pedal delivers vintage-inspired auto-wah sounds through its opto-coupler design. It features controls for Peak, Filter, and Gain, along with a selectable sweep direction switch (up or down) and three filter range positions—Hi, Mid, and Low—allowing for a wide tonal range. Powered by a standard 9V DC power supply (not included), the Neutrino is compact, reliable, and great for players looking to add a responsive, expressive filter effect to their pedalboard without breaking the bank.