Above: this one caught me by surprise. Neil Young endorses Altec PA kit in 1971. We see the Altec 1210A console and 1205A powered speakers. Apparently Don Ellis and Merle Haggard were also endorsers at the time.
Today: some early ‘seventies adverts for Altec PA gear. Altec equipment was no longer state-of-the-art studio gear by this period, but they seem to have enjoyed continuing success with sound reinforcement. For a full catalog download that discusses much of the equipment featured, click here and visit this earlier post.