Reverb - Analog* Reverb PedalREVERB is an all analog circuit implementing four separate PT2399 delay lines, each spaced roughly 1. 5x apart in time, insuring minimal overlap. This design targets a generic, natural resonant echo chamber effect, crudely similar to a 4 spring topology. Tonality is clean with minimal distortion, very low noise, and none of that metallic after taste. Specifications True bypass Swell (decay) control 0dB gain 82k ohm input impedance 0. 05% distortion @