Harman Kardon SR-600

Not much is documented about the Harman Kardon SR-600. The record shows an all-transistor FM stereo receiver from the mid-1960s, part of Harman Kardon's Stratophonic Series. An advertisement in HiFI/Stereo (November 1964, p.113) introduced the Stratophonic line as "new all-transistor" and claimed it delivered "the best-performing FM stereo receivers ever made - at any price." A product preview in Audio (August 1965, p.50) listed the SR-600 among current receivers, next to models from Grommes, Knight, and Fisher.

A later variant, the SR-600B, appeared in 1966. Audio (March 1966, p.33) described the "B" Series as offering "increased power, extraordinary power bandwidth, unequalled frequency response and reliability." It listed the SR-600B at 80 watts IHF music power and a price of $361.90. The printed figure reads $3619, almost certainly a typographical error, the kind common to OCR captures of period ads. Past these period mentions, the available sources hold no detailed specifications, production years, or design notes.