Stomp Under Foot Tri-Dirty Booster - Vintage MiniMaker: Stomp Under Foot Model: Tri Dirty Booster Condition: New Description: In the mid 1970s, Hohner released what I believe is the best version of the Muff circuit ever made, the Tri Dirty Booster. There is still a lot of mystery surrounding this pedal. No one seems to know who actually built it for Hohner, what exact circuit it was based on, or why certain changes were made. Whatever was done to the circuit resulted in something special. The low