Version 2 of Catalinbread's Ampeg amp circuit. Pedal offers a nice clean boost with an EQ that scales up to mild overdrive, plus there is a button to kick it up to a fuzz.
Pedal is in great condition, but there is either a chip or error in the print job where there is blemish above the ea in Catalinbread.
For EQ this uses a “Baxandall” Treble and Bass shelving circuit. The cool thing about this Treble and Bass circuit is that it can cut and boost and also be relatively flat when the controls are set to noon.
The SFT uses JFETs for its gain stages.
More details in their manual:
https://catalinbread.com/products/sft2?srsltid=AfmBOorLwPqReGupckrYU9BinSSduKI7wyuuqNB_zCwb7PVz6rBa33-k