The Proton is a dynamic envelope filter designed as a modern homage to the classic Mu-tron III envelope filter. This is version 3 which features a tone control for fine control over the filter sweep, and controls for gain, peak, decay and a sweep mini toggle. It also has increased sensitivity range for better compatibility with low-output instruments and phase-correct output for predictable use in blend pedal signal chains.
This modern classic pedal is lightly used and shows minor signs of love and use, but it works great. It will ship to you the next day with the original box.