In 1957, Hirsch and Gladden Houck, who also worked on the
Audio League Report, formed Hirsch-Houck Laboratories, where they continued testing audio equipment such as turntables, receivers, and speakers, and sold the data to various publications. In 1960, Ziff-Davis Publishing bought out Gladden Houck and Hirsch began providing test data exclusively for its publications, although the lab continued to be called Hirsch-Houck Laboratories. Hirsch first tested gear for
Popular Electronics, then, in October 1961, for
Hi-Fi/Stereo Review, which was later renamed
Stereo Review. He also began writing the monthly column "Technical Talk." Hirsch estimated that he wrote about 4,000 laboratory test reports for various publications, 2,400 of those at
Stereo Review, by the time he retired in 1998. He remained an editor-at-large for
Stereo Review, which merged with
Video magazine, and in 2000 was renamed
Sound & Vision. ==Legacy==