74. Stereos and Stereo Reproduction, , 1939-1983

Summary: Documents the evolution of sound reproduction through CR's research and testing of the reliability of stereo record players, stereo components, tape recorders. Includes correspondence, catalogs, project files, newsclippings, advertisements, Hi-Fi Show literature, notes, test results, purchase forms, and testing procedures. Subjects include stereo sound reproduction including phonographs/record players, quadraphonic systems, stereo receivers, amplifiers, phonograph pick-up arms, record changers, turntables, needle, phonograph records, record care and cleaning, technical purpose records, loudspeakers, stereo headphone, tape recorders including portable cassette players, radio communications and sound reproduction apparatus, and stereo and radio combination products. See Radio series for related components.