The Crescent Distortion is inspired by the MI Audio Crunch Box, itself a heavily tweaked variant of the Marshall Bluesbreaker with some inspiration from the Fulltone OCD. It’s solidly in the family of Marshall-like pedals and is lauded for its high-gain “stack of amps” tone. It was originally released in 2006 and has seen four major versions since that time, with the most recent being named the Super Crunch Box.
The Crescent is not a direct clone or copy of any of these versions. It is most similar to version 4, but with an added option for 18V operation using a charge pump as well as an external “Presence” control.
The Crunch Box was the inspiration for another well-known high gain pedal, the Suhr Riot. An Aion FX adaptation of the Riot is available called the Fusion Distortion.