Today in Music History, June 20

June 20, 1974, Van Morrison, The Allman Brothers Band, The Mahavishnu Orchestra, Tim Buckley, The Sensational Alex Harvey Band and The Doobie Brothers all appeared at Knebworth Park, Stevenage, England. A special PA system was used for the event, claiming to be the best ever for an outside show, weighing 12 tons and needing five technicians.

http://www.ukrockfestivals.com/kneb74menu.html