The 1.919.100-14 audiophile RIAA phono card was designed in 1974 for use in the Bozak home 909, 919, and commercial CMA 10-2DL mixers. It is a stereophonic design of the monophonic A603D card used in the last produced CMA 10-2D mixers. Specifications for the 1.919.10-14 card remained identical until production end. Card material changed along with component availability and beginning in 1982 most 

The 1984 DLA/DLS manual with typed ADDENDUM note tucked in the folded schematic partition.

Original 1.919.100-14 component print from Bozak shows the only component variation being the 150/330 ohm resistor depending on the model mixer the card was installed in. These prints are from Sheldon Glick who was the last company owner.

Later produced cards installed in the commercial CMA 10-2DL mixer had C7 and C27 updated. The 35 volt 3.3 Matsuo tantalum became a 63 volt 10ufd Fracko electrolytic. The update was made to accommodate DJs experiencing an issue. The change was hand written on company schematics and installed on all cards till production end.