primare pre35 prismaPrimare Pre35 Prisma. " CONTROL FREAK". A control preamps most important task must be to handle and convey the sensitive and delicate signals from the connected sources as gently and untouched as at all possible.. Only in this way are the subtle nuances and details that characterize true high end sound preserved not an easy task at all. Many manufacturers will readily acknowledge just how difficult and complex it really is to produce a good control