Black Sabbath California Jam Video

California Jam, also known as Cal Jam, was a rock music festival concert held at the Ontario Motor Speedway in Ontario, California on April 6, 1974. It was produced by ABC Entertainment, Sandy Feldman, and Leonard Stogel. Pacific Presentations, a Los Angeles-based concert company headed by Sepp Donahower and Gary Perkins. Don Branker worked for Leonard Stogel and was responsible for concert site facilitation, toilets, fencing and medical. It attracted 250,000 fans that paid, which at the time, set the record for the loudest amplification system ever installed, the highest paid attendance, and highest gross in history. It was the last of the original wave of rock festivals, as well as one of the most well-executed and financially successful, and presaged the era of media consolidation and the corporatization of the rock music industry.