Used Keeley Neutrino Envelope Filter Effect Pedal

The used Keeley Neutrino Envelope Filter delivers funky, responsive auto-wah effects with precision control. In good condition, it features adjustable peak, filter selector (low-pass, band-pass, high-pass), and a sensitivity knob for dynamic response tailored to your playing style. Powered by a 9V DC supply, this compact pedal is perfect for guitar or bass, offering studio-quality tone shaping with true bypass switching to preserve your signal when disengaged. A must-have for expressive funk and groove tones.