Hello,
I'm the owner of that Activator setup on Reverb
I purchased that set for an upgrade of a Steinberger GR from a seller who described it as all Alembic
the volume and filter controls display the Alembic marking on their respective circuit boards, but the preamp does appear to be of different design, on a blue breadboard with no Alembic marking
I will revise the Reverb ad description and welcome and other info anyone may have about the preamp origins - home-brew from a Stratoblaster kit?
Ken