Building a simple mixer around Neumann psvd f summing card

Hi all! I have come into ownership of an old Neumann psvd f summing card and originally was considering just making a passive summing mixer but now am considering a slightly more fully featured design The idea right now is a 12 to 2 mixer with 4 mono and 4 stereo channels mainly to be used as an active stem/summing mixer with some capabilities for tracking and monitoring. The inputs will be transformer balanced and since it will be receiving the outputs from the daw mostly, I’ll... Read more