Early Model 300 deck plate. Note plywood in middle of sandwich. Early Model 300 seven-terminal barrier strip.
Later ones have nine terminals.
Model 351 rackmounted Model 351 electronics. Note black dot under input transfer switch. Top view of an MM-1200. Studer C-37 from the Ampex Museum Neumann M49 with the cover removed. Wash. Karl Welty, Alex Kostelnick, and Dave Dintenfass in front of Karl's bathtub Model 300.