This very cool poster was used for a Soundproof Production show at the Avalon Ballroom in February 1969. Steve Miller, Allmen Joy, and Linn County provided the music and Jerry Abrams provided the light show. Soundproof Productions moved onto the scene in 1969 after Chet Helms’ Family Dog lost it’s lease at the Avalon Ballroom in November 1968. Notably, Soundproof produced the late January 1969 shows by the Grateful Dead, some of which became part of the “Live Dead” album, and the poster they paid for to advertise those shows was the famous Aoxomoxoa poster by Rick Griffin.
In March 1968, while in England, the Steve Miller Band recorded their debut album, Children of the Future, at Olympic studios with Glyn Johns as engineer/producer and their second album, “Sailor” appeared in October 1968 and climbed the Billboard chart to No. 24. Successes included the single "Living in the USA." Brave New World (No. 22, 1969) and "Space Cowboy.”
Linn County was an American blues-based band based in Iowa, and later in San Francisco, California. Linn County released three albums from 1968 to 1970 which didn’t have much impact.
Allmen Joy was a San Francisco-based garage band not to be confused with the Allman Joys, featuring Gregg and Duane Allman. Their existence, however, was enough to encourage the Allman Brothers to change their name to the Hour Glass. Not a bad claim to fame!