“The California Jam”, 54,000 watts of audio power

[Did J]

I'm often viewing with delectation one of the most exciting Deep Purple performance, The California Jam, and its full glory. But I had a complete misunderstanding about the people behind it all. But those persons in attendance did witness one of the planet’s most massive outdoor concert sound systems ever pieced together.
Here is the link : http://www.prosoundweb.com/article/hist ... ia_jam/P1/" onclick="window.open(this.href);return false;

And another story about the 1983 US Festival, featuring Judas Priest and others as you know.
The link: http://www.prosoundweb.com/article/us_festival/" onclick="window.open(this.href);return false;

So, take a look at these great articles, a must to read!