This is a modded Benson Preamp by Dylan159 on Freestompboxes.  Dylan has taken the original and simplified it but has retained the overall character.  Quite a detailed explanation via the link above, including a schematic, LTSPICE model traces, audio and his vero layout.   What a solid effort.

For me, this is useful, as it has a standard pot value for the bass control, rather than a hard to find B2M pot.

BENSON PREAMP – MODDED – VERO LAYOUT

note: pin 1 volume to ground